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DISTRIBUTED POWER GENERATION FROM RICE HUSK GASIFICATION IN RURAL MYANMAR

MIN LWIN SWE

MASTER OF ENGINEERING IN MECHANICAL ENGINEERING

THE GRADUATE SCHOOL CHIANG MAI UNIVERSITY

MAY 2009

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DISTRIBUTED POWER GENERATION FROM RICE HUSK GASIFICATION IN RURAL MYANMAR

MIN LWIN SWE

A THESIS SUBMITTED TO THE GRADUATE SCHOOL IN PARTIAL FULFILLMENT OF THE REQUIREMENTS

FOR THE DEGREE OF MASTER OF ENGINEERING

IN MECHANICAL ENGINEERING

THE GRADUATE SCHOOL CHIANG MAI UNIVERSITY

MAY 2009

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DISTRIBUTED POWER GENERATION FROM RICE HUSK GASIFICATION IN RURAL MYANMAR

MIN LWIN SWE

THIS THESIS HAS BEEN APPROVED TO BE A PARTIAL FULFILLMENT OF THE REQUIREMENTS

FOR THE DEGREE OF MASTER OF ENGINEERING IN MECHANICAL ENGINEERING

EXAMINING COMMITTEE

............................................................................................................CHAIRPERSON Asst. Prof. Dr. Chatchawan Chaichana

……………………………………………………………………………...MEMBER Asst. Prof. Dr. Nakorn Tippayawong

…………………………………………………………………………...…MEMBER Dr. Yucho Sadamichi

……………………………………………………………………………...MEMBER Asst. Prof. Dr. Kriengkrai Assawamartbunlue

28 May 2009 © Copyright by Chiang Mai University

iii �

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ACKNOWLEDGEMENTS

First and foremost, I would like to express my profound gratitude and respect

to my advisor Assistant Professor Dr. Nakorn Tippayawong, Department of

Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Thailand

for his invaluable supervision, helpful suggestion and necessary assistance through

out the preparation of my thesis.

My deep gratitude also goes to my co-advisor Assistant Professor Dr.

Chatchawan Chaichana for his peer review, priceless comments, suggestion and

encouragement. I am also equally grateful to other member of academic advisory

committee Dr. Yucho Sadamichi and Dr. Kriengkrai Assawamartbunlue for their

suggestions and advice on my thesis.

Special thanks are also extended to Department of Alternative Energy

Development and Efficiency, Ministry of Energy, Thailand for financial support and

the Energy Planning Department of Myanmar, the Myanmar Engineering Society, the

Energy Research and Development Institute in Chiang Mai University and the

villagers of Dagoon Daing Village, Twantay Township, Yangon, Myanmar for their

support and helpful.

Many thanks are extended to Ministry of Science and Technology, Union of

Myanmar for providing me the opportunity to pursue this master’s degree. I am very

much delighted to pay thanks for the warm and cordial friendship provided by all

Mechanical students-juniors, mates as well as seniors from Chiang Mai University,

Thailand. Moreover, my sincere thanks are to all academic and administrative staffs

of Chiang Mai University for their helps. Many thanks also go to all oversea

Myanmar students for sharing joyful moments in Chiang Mai.

Finally, I wish to thanks everyone whose names could not be mentioned

individually.

Min Lwin Swe

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Thesis Title Distributed Power Generation from Rice Husk

Gasification in Rural Myanmar

Author Mr. Min Lwin Swe

Degree Master of Engineering (Mechanical Engineering)

Thesis Advisor Asst. Prof. Dr. Nakorn Tippayawong

ABSTRACT

Myanmar is known for her natural diversity and abundance in agricultural and

forestry products. Major biomass residues available include rice husk, wood and

bamboo. These renewable energy sources have great potential to be utilized for power

generation, considering the fact that the country experiences shortage in electricity

supply, especially in rural areas. In this thesis, a rice husk gasifier-engine-generator

system and electrification system had been constructed and operated successfully for

4 hours per day. This engine was modified so that can use both diesel and producer

gas produced by the gasifier. The maximum generator capacity of the unit is 50 kW.

Lamp posts and electricity line were also installed along main roads, and connected to

local school, temple and 304 households in Dagoon Daing village, Twantay

Township, 50 km away from Yangon. Almost 400 light bulbs were fitted, serving

nearly 1500 villagers. From the test results, it was found that at 31.28 kW, rice husk

consumption rate was 32.64 kg/h, representing a diesel replacement rate of about 65%

with overall energy efficiency of 13.5%. The electricity cost has been estimated to be

in the range between $0.12-0.23/kWh (150-300 kyat/kWh) in compression to

$0.60/kWh (800 kyat/kWh) from an existing diesel system. The utilization of rice

husk as an energy source for this kind of gasifier could save the annual oil

expenditure.

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TABLE OF CONTENTS

Page

Acknowledgements iii

Abstract (Thai) iv

Abstract (English) vi

Table of Contents vii

List of Tables xi

List of Figures xii

Chapter 1 Introduction 1

1.1 Rural electrification 1

1.2 Literature reviews 3

1.2.1 Small distributed generation 3

1.2.2 Biomass gasification 4

1.2.3 Impacts on people 7

1.3 Objectives 7

1.4 Scope of the thesis 8

Chapter 2 Background Theory 9

2.1 Distributed generation 9

2.2 Gasification 10

2.2.1 Drying zone 11

2.2.2 Pyrolysis zone 11

2.2.3 Combustion zone 12

2.2.4 Reduction zone 12

2.3 Biomass resources 18

2.3.1 Rice husk 18

2.3.2 Wood 19

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2.3.3 Bamboo 20

2.4 Economic analysis 21

2.4.1 Net present value 21

2.4.2 Internal rate of return 22

2.4.3 Payback period 22

Chapter 3 Methodology 24

3.1 Energy Efficiency 24

3.1.1 System efficiency 24

3.1.2 Engine efficiency 25

3.2 Social and economic impacts from field survey 25

3.3 Measuring equipment for gasification project 26

3.3.1 Multifunction power meter 26

3.3.2 AC power clamp meter 27

3.3.3 Digital tachometer 27

3.3.4 Measured fuel consumption 28

Chapter 4 Distributed Generation System 29

4.1 Site selection and survey 29

4.1.1 Twantay Township 29

4.1.2 Site visit 30

4.1.3 Data collection 31

4.1.4 Data interpretation 31

4.1.5 Site selection 31

4.2 Biomass analysis 35

4.2.1 Potential biomass as fuels in Myanmar 35

4.2.2 Fuel analysis methods 35

4.3 Biomass gasification system 38

4.3.1 Downdraft gasifier system 39

4.3.2 Cyclone separator 39

4.3.3 Venturi scrubber 40

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4.3.4 Gas cooler 41

4.3.5 Carbon fiber filter 41

4.3.6 Fine filter unit 42

4.3.7 Gas damper 42

4.3.8 Water pump 43

4.4 Electrification system 44

4.4.1 Engine 44

4.4.2 Generator 45

4.4.3 Electric control panel 46

4.5 Building 46

4.6 System installation, wiring, and testing 47

4.6.1 System installation 47

4.6.2 Electricity wiring and network 47

4.6.3 System operation 50

4.6.3.1 Preparation 50

4.6.3.2 System operating procedures 51

4.6.3.3 Maintenance 53

4.6.3.4 The treatments and recycling program

to Waste products 54

4.7 Test runs 55

Chapter 5 Results and discussions 56

5.1 Technical results 56

5.1.1 Biomass fuel analysis 56

5.1.2 System testing 57

5.2 Socio-economic impacts 66

5.3 Other impacts 68

Chapter 6 Conclusions and recommendations for future works 69

6.1 Conclusions 69

6.2 Recommendations 70

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References 71

Appendices Appendix A Nomination of Potential Sites 74

Appendix B Selection of Dagoon Daing Village 76

Appendix C Biomass Fuel Analysis Results 78

Appendix D Questionnaires 115

Appendix E Publication 124

Curriculum Vitae 137

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LIST OF TABLES

Table Page

2.1 Annual production of paddy 19

2.2 Forest area by types of forests 20

3.1 Detail of electricity loads use pattern 26

4.1 Detail data of the four purposed sites 32

4.2 Weighting and decision making table 34

5.1 Ultimate Analysis 56

5.2 Proximate analysis, heating value and density 56

5.3 Ash analysis 57

5.4 Properties of rice husk at different loads 60

5.5 Electricity consumption in the villages at different loads 60

5.6 Comparison of electricity cost between diesel and dual fuel operation 65

5.7 Waste water analysis 65

xii

LIST OF FIGURES

Figure Page

1.1 Hydropower Potentials of Myanmar (State and Division Wise) 2

1.2 Gasification Processes and products 4

2.1 Small Distributed Generation for villagers 9

2.2 Updraft gasifier 13

2.3 Downdraft gasifier 15

2.4 Crossdraft gasifier 16

2.5 Fluidized bed gasifier 17

2.6 Rice Husk 18

2.7 Wood 20

2.8 Bamboo 21

3.1 Field survey in the study area 25

3.2 Multifunctional power meter 27

3.3 AC power clamp meter 27

3.4 Digital tachometer 28

3.5� Platform scale 28

4.1 Twantay Township and road transport to Yangon 30

4.2 Location of the four purposed sites 30

4.3 Potential biomass resources 35

4.4 Rice Huck Gasification System 38

4.5 Downdraft Gasifier 39

4.6 Cyclone 40

4.7 Venturi scrubber 40

4.8 Gas cooler 41

4.9 Carbon fiber filter 41

4.10 Fine filter unit 42

4.11 Gas damper 43

4.12 Water pump 43

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Figure Page

4.13 Engine 44

4.14 Automatic governor 44

4.15 Generator 45

4.16 Generator nameplate 45

4.17 Electric control panel 46

4.18 Picture of the building 46

4.19 Installation of the gasification system inside the building 47

4.20 Electricity distribution lines and power plant location in the village 48

4.21 Three-phase electricity lines from the system building 49

4.22 Electricity poles along the main road 49

4.23 Lamp posts along the main road 49

4.24 Rice husk storage 50

4.25 Rice husk level 50

4.26 Water level in the circulating pond and the dust cooler 51

4.27 Radiator, diesel and lubricant oil tanks 51

4.28 Air control valve 52

4.29 The key of starting engine 52

4.30 Ash removal system 53

4.31 Ash at the pond and the tray 54

4.32 Filters 54

5.1 Electrical current and power 57

5.2 Electrical voltage and power 58

5.3 Power factor and power 58

5.4 Relationship between power generated and rice husk Consumption 59

5.5 Relationship between power generated and diesel consumption 59

5.6 Operators in action 67

5.7 Lighting for extra reading at night 67

5.8 Snooker game at night 68

5.9 Evening entertainment 68�

Chapter 1

Introduction

1.1 Rural Electrification

Increasing demand of energy and negative impacts of fossil fuels on the

environment has emphasized the need of harnessing energy from renewable sources.

These sources can create a significant impact in the generation of grid electricity.

55.4 million of people live in Union of Myanmar, but 70 percent of people live

in rural areas and earn a living based on agriculture. There are plenty of biomass and

agricultural by-products in the country. In order to reinforce the present national grid

system and to facilitate power transmission from new generating stations, Ministry of

Electric Power (MEP) carried out 21 transmission line projects at present and planned

more transmission line projects to be implemented in the near future.

The information below, currently found on the website of the Myanmar

Ministry of Energy, has not been updated since the Ministry of Electric Power was

reconstituted as two separate ministries in May 2006. However, the data provides a

useful picture of the Ministry and its resource as they existed in 2000 and is useful for

historical purposes. It also includes map, Figure 1.1 is the locations of 29 hydro-

electric projects then on the drawing boards.

The generation of electricity from hydropower plants during 1999-2000 has

been approximately 959.46 million kWh constituting about 21 percent of the total

power generation. MEP has developed hydropower projects mostly in remote border

areas. The electricity generation in Myanmar increases two folds during the last 10

years. As a statistical statement, the figures are not updated and according to the

estimation in year 1999-2000, 80 percentage of the total power generation are still in

progress with many projects of government.

However, electrical power cannot be distributed to many rural areas in

Myanmar. In rural areas, various forms of energy are used. These areas do not have

access to electricity; people use wood, charcoal, bamboo, and rice hull for cooking

and candles, kerosene lamps for lighting at night. They also use engines and

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generators to produce electricity for lighting. Therefore, a rice husk gasifier was

constructing operated and studied in 2007.

Figure 1.1 Hydropower Potentials of Myanmar (State and Division Wise)

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Biomass gasification is basically a conversion of solid biomass into a

combustible gas mixture normally called “Producer Gas” (or low Btu gas). The

process involves partial combustion of biomass. Partial combustion produces carbon

monoxide (CO) as well as hydrogen (H2) which are both combustible gas. Solid

biomass fuels, which are usually inconvenient and have low efficiency of utilization

can thus, be converted in to a high quality gaseous fuel.

From cooperation project in energy related projects between Thailand and

Myanmar under Ayeyarwaddy - Chaophaya - Mekong Economic Cooperation

Strategy (ACMECS), the Government of Thailand has approved financial assistance

on study and demonstration of biomass gasification for electricity project. The project

aims to provide electricity to a local community in Myanmar in order to improve their

living standards. A community in Twantay Township, Dagoon Daing Village, was

selected. The community consists of two villages, which are Dagoon Diang Village

and Alehsu Village. A rice hull gasification unit is constructed and operated. The

gasifier is coupled with a diesel engine to drive an electric generator. An electricity

grid and street lighting were installed in the community. The system is able to

distribute electricity to 304 houses with the population of 1,496 people.

1.2 Literature Reviews

1.2.1 Small distributed generation

Distributed generation (DG) has been defined in many ways, creating some

confusion in terms of regulatory rule applicability. It is most commonly defined as the

generation of electricity near the intended place of use. Some parties define it with

size limitations, other exclude back up generation, and yet others make no distinction

between generation connected to the transmission system or the distribution system.

The Energy Commission assumes the following definition: DG is electric generation

connected to the distribution level of the transmission and distribution grid usually

located at or near the intended place of use. (M. Marks, 2002)

For this report, staff defines DG as electricity production that is on-site or

close to a load center and is interconnected to the utility distribution system. In

practical terms, this limits the definition of DG to less than 20 megawatts (MW) since

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systems larger than this would typically be interconnected at sub-transmission, or

transmission system voltages. (M. Rawson and J. Sugar, 2007)

The performance and impact of a decentralized biomass gasifier-based power

generation system in an unelectrified village are presented. The system consists of a

20 kW gasifier-engine generator system with all the accessories for fuel processing

and electricity distribution. Technical, social, economic and management-related

lessons learnt are presented. (N. H. Ravindranath, H. I. Somashekar, S. Dasappa and

C. N. Jayasheela Reddy, 2004)

1.2.2 Biomass gasification

Figure 1.2 Gasification Processes and products

Handbook of biomass downdraft gasifier engine system explains how biomass

can be converted to a gas in a downdraft gasifier and gives details for designing,

testing, operating, and manufacturing gasifiers and gasifier systems. Criteria include

gasifier application, the availability of suitable equipment, biomass fuel availability

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and fuel-source reliability, regulations, operator availability, and of course cost and

financing.

The spark ignition engine operating on gasoline achieves a thermal efficiency

of 25%-30%. The same engine operating on producer gas may achieves 15%-25%

thermal efficiency, depending on how well the engine is converted to producer gas. A

diesel engine using diesel typically achieves 30%-35% thermal efficiency. Operating

on 90% producer gas, it can be expected to give 25%-30% thermal efficiency. The

overall efficiency of the system must be computed from engine efficiency and gasifier

efficiency. (T. B. Reed and Agua Das, 1988)

The efficiency of the engine-generator set was generally lower and the total

energy input to the engine was always higher on the dual fuel operation. The

maximum engine-generator set efficiency with dual fuel operation achieved was

14.71%, while pure diesel operation gave 22.41% efficiency for the same load. (S.C.

Bhattacharya, S.S. Hla, H.L. Pham, 2001)

Biomass gasification for obtaining gas and further the liquid fuels, of course,

will be a very good alternative because of the introduction of renewable energy

concept. There are several kinds of gasification processes in according with the

different gasification agent. (L. Wei-ji, Z. Da-lei, R.Yong-zhi, 2002)

Coal, wood and charcoal gasifiers have been used for operation of internal

combustion engines in various applications since the beginning of this century. A

major problem could result from the slow carbon build-up in the engine's cylinders as

a consequence of traces of tar or dust in the gas. Whether this is due to too low engine

loads or to a defective glass fibre cloth filter remains to be tested. (B. Kjellstrom,

1986)

Studies on the effect of size, structure, environment, temperature, heating rate,

composition of biomass and ash are reviewed. From the foregoing review, the

following observations could be arrived at: Biomass is a compound consisting of C,

H, and O in major quantity. The composition of C, H and O is more or less same in all

biomasses. The calorific values are also nearly same. Environment results in pyrolysis

or complete gasification of biomass. Heating rate influence the quality of gasification

and quantity of products. Porous biomasses are gasifier completely into ash at

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temperatures less than 600° C. (V. Kirubakaran, V. Sivaramakrishnan, R. Nalini, T.

Sekar, M. Premalatha, and P. Subramanian, 2007)

Surveys of rural household energy use activities incorporating the production

and utilisation of woody biomass, and of the forest products industries incorporating

forest harvesting, wood processing and residues generation, were undertaken to assess

the availability of wood biomass that could be utilised in biomass-electricity systems

in Kenya. Biomass gasifier demonstration programmes should give preferences to

sites where adequate technical skills, sufficient fuel resources, and skilled operator

availability coincide with direct economic interests. Specific sites meeting these

criteria for small scale biomass-electricity systems were identified in this study. (K.

Senelwa, Ralph E.H. Sims, 1999)

The principals of gasification, and old and new types of gasifiers, are

discussed for both power and heat applications. The downdraft gasifier may be

summarized as follows;

- High amounts of ash and dust particles remain in the gas because the gas has to

pass the oxidation zone, where it collects small ash particles.

- The moisture content of the biomass must be less than 25 percent (on a wet

basis).

- The relatively high temperature of the exit flue gas results in lower gasification

efficiency.

The main difficulties are in the gas cleaning systems (preferably at high

temperatures) and meeting all requirements set by gas turbine manufactures in

adapting gas turbine to low calorific gases. (P. Quaak, H. Knoef, H. Stassen, 1998)

The slow pyrolysis of rice husk has been investigated at temperature of 350°C

to 450°C. The primary results are the following:

(a) An average yield of 10% dry tar, 27% water, 18% gas and 45% char.

(b) The charred rice husk has a slightly higher heating value of 16 MJ kg -1 compared

to 15.3 MJ kg -1 for rice husk.

(c) The energy fraction lost due to charring amounts to 45-55% on a dry basis.

(d) The rice husk char consists of approximately 45% ash, 45% carbon and 10%

remaining volatiles.

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Rice husk ash does have a very high softening temperature (>1400°C), but

nevertheless tends to slag if the fuel bed structure is disturbed by high superficial gas

velocities. (A. Kaupp, 1984)

The rice husk gasification use of a water jet scrubber gives a satisfactory tar

removal from the producer gas. This gasification unit is very simple to be operated by

a low skill operator. The main tack in order to maintain the satisfactory gasification

process is the regular cleaning of the gas cleaning and cooling as well as piping line.

The use of rice husk as an energy substitution by means of the gasification process

can reduce the diesel oil consumption by 70%. A particular economic analysis shows

a big opportunity to supply electricity profitably by using this system. (R. Manurung,

H. Susanto and Sudarno H., 1986)

1.2.3 Impacts on people

Electricity for lighting in all houses has helped school-going children in their

studies and women in their household chores. The unique feature of the project in

Hosahalli is equitable sharing of benefits by all the households and reliable provision

of services on most days in a year, contributing to improved quality of life for all. (N.

H. Ravindranath, H. I. Somashekar, S. Dasappa and C. N. Jayasheela Reddy, 2004)

In the present study, potential assessments of all the available energy sources

is carried out and found that the conventional diesel power plant can be replaced by

renewable energy sources in self-sustainable manner to achieve energy independent in

a remote island. It is suggested to replace existing 400kW diesel generating plant and

50 kW solar power plant by 100 kW biogas power plant, 150 kW biomass gasification

plant and 200 kW solar PV system. Such development will also ensure that there is no

adverse impact on environment and socio-economic life of the habitants. (S.K. Singal,

Varun, R.P. Singh, 2007)

1.3 Objectives

The required necessary information for self-electricity and to develop model of

rice husk gasification in rural region of Myanmar are vital intentions for this project

and specified ranges are as follows;

- To survey energy related data of rural villages for power plant installation

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- To test the gasifier power plant

- To evaluate economic and social impact on villager’s livelihood

1.4 Scope of the thesis

� The study focuses on three types of biomass only.

� The study site is in Yangon, Myanmar.

� The power plant is community sized of 50 kW.

� Compare technology and cost between systems with diesel and diesel/producer

gas as fuel.

� Analyze technical and social-economic of the system.

Chapter 2

Background Theory

2.1 Distributed generation

Distributed generation (DG) generally refers to small scale (1-50 kW) electric

power generators that produce electricity at a site close to customers or that are tied to

an electric distribution system. Distributed generators include, but are not limited to

synchronous generators, induction generators, reciprocating engines, microturbines,

combustion gas turbines, fuel cells, solar photovoltaic’s, and wind turbines. DG can

be used to generate a customer’s entire electricity supply; for peak shaving

(generating a portion of a customer’s electricity onsite to reduce the amount of

electricity purchased during peak price periods); for standby or emergency generation

(as a backup to Wires Owner's power supply); as a green power source (using

renewable technology); or for increased reliability. In some remote locations, DG can

be less costly as it eliminates the need for expensive construction of distribution

and/or transmission lines.

Figure 2.1 Small Distributed Generation for villagers

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Benefits of DG include:

•A lower capital cost because of the small size of the DG (although the investment

cost per kVA of a DG can be much higher than that of a large power plant).

•Reduction of the need for large infrastructure construction or upgrades because the

DG can be constructed at the load location.

• If the DG provides power for local use, it may reduce pressure on distribution and

transmission lines.

•With some technologies, produces zero or near-zero pollutant emissions over its

useful life (not taking into consideration pollutant emissions over the entire product

lifecycle i.e. pollution produced during the manufacturing or after decommissioning

of the DG system).

•With some technologies such as solar or wind, it is a form of renewable energy.

•Can increase power reliability as back-up or stand-by power to customers.

•Offers customers a choice in meeting their energy needs.

•There are no uniform national interconnection standards addressing safety, power

quality and reliability for small distributed generation systems.

•The current process for interconnection is not standardized among provinces.

• Interconnection may involve communication with several different organizations

•The environmental regulations and permit process that have been developed for

larger distributed generation projects make some DG projects uneconomical.

•Contractual barriers exist such as liability insurance requirements, fees and charges,

and extensive paperwork.

2.2 Gasification

Gasification refers to a thermochemical conversation of carbonaceous solid

fuel into a gaseous energy medium by adding an oxidizing agent (air, oxygen, water

vapour). If air or oxygen is used, the oxidization reactions can supply the heat

necessary for converting the endothermic stages: so external energy supply is not

necessary. The product is a mixture of combustible and non-combustible gases,

liquids and solids. The principal combustible gas components are CO and H2. Other

11

include CH4, but in small proportions. The final product composition will depend on

operating conditions, the gasifier and the fuel type.

The process in the gasifier can be broken down into different stages:

- Drying Zone

- Pyrolysis Zone

- Combustion Zone

- Reduction Zone

2.2.1 Drying Zone

Solid fuel is introduced into the gasifier at the top. As a result of heat transfer

from the lower parts of the gasifier, drying of wood or biomass fuel occurs in the

bunker section.

The water vapour will flow downwards and add to the water vapour formed in

the oxidization zone. Part of it may be reduced to hydrogen and the rest will end up as

moisture in the gas.

2.2.2 Pyrolysis Zone

At temperature above 250°C, the biomass fuel starts pyrolysing. The pyrolysis

reactions are not well known, but one can summarise that large molecules (such as

cellulose, hemicelluloses and lignin) break down into medium size molecules and

carbon (char) during the heating of feedstock. The pyrolysis products flow

downwards into the hotter zones of the gasifier. Some will be burned in the

oxidization zone, and the rest will break down to even smaller molecules of hydrogen,

methane, carbon monoxide, ethane, etc: if they are remaining in the hot zone long

enough.

If the residence time, in the hot zone is too short or temperature too low, then

medium size molecules can escape and will condense as tar oil.

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2.2.3 Combustion Zone

A combustion (oxidization) zone is formed at the level where oxygen (air) is

introduced. Reactions with oxygen are highly exothermic and result in a sharp rise of

the temperature up to 1200-1500°C.

As mentioned above, an important of the oxidization zone, apart from heat

generation, is to convert or oxidize virtually all condensable product from the

pyrolysis zone. In order to avoid cold spots in the oxidization zone, air inlet velocities

and the reactor geomentry must be well chosen.

Generally two methods are employed to obtain an even temperature

distribution:

- reducing the cross sectional area at a certain height of the reactor (“throat concept”)

- spreading the air inlet nozzles over the circumference of the reduced cross area.

Oxidation or combustion is described by the following chemical reactions:

C + O2 CO2 (- 393 MJ/kg mole) (2.1)

2 H2 + O2 2 H2O (- 242 MJ/kg mole) (2.2)

2.2.4 Reduction Zone

The reaction products of the oxidization zone move downward the reduction

zone. In this zone the sensible heat of the gases and charcoal is converted as much as

possible into chemical energy of the producer gas.

The end product of the chemical reaction that takes place in the reduction zone

is a combustible gas which can be used as fuel gas in burners. After dust, condensed

tars and moisture removal and cooling the gas is suitable for use in engines.

The following reactions take place in the reduction zone.

C + CO2 2 CO (+173 MJ / kmol) (2.3)

C + H2O CO + H2 (+131 MJ / kmol) (2.4)

CO2 + H2 CO + H2O (- 41 MJ / kmol) (2.5)

C + 2 H2 CH4 (- 75 MJ / kmol) (2.6)

CO + 3 H2 CH4 + H2O (- 205 MJ / kmol) (2.7)

13

Equation (2.3) and (2.4), which are the main reaction of reduction show that

reaction requires heat. Therefore the gas temperature will decrease during reduction.

Reaction (2.5) describes the so-call water-gas equilibrium.

Gasifiers are classified as follows:

- Updraft gasifier

- Downdraft gasifier

- Crossdraft gasifier

- Fluidized bed gasifier

- Other types of gasifiers

Updraft gasifier

The common type of a counter current gasifier is a vertical reactor where the

feed stock is entered from the top.

Figure 2.2 Updraft gasifier

The directions of fuel flow and gas flow being opposed, separate reaction

zones formed in the reactor. The gas rises inside the reactor and leaves at the top

14

section, which is why this type is also designated as updraft gasifier. Counter-current

gasifiers have the advantage that they do not require any special fuel preparation thus

allowing the gasification of a wide range of biomass types with different particle size

and moisture contents. Through forced convection, the gas heated by oxidation in a

bottom zone rises and transfers heat to fuel and the gas leaves the gasifier with a

relatively low temperature, which indicates a high gasification efficiency of this

process. The drawback of it results from volatile matter produced in the pyrolysis

zone, which is carried in the rising gas steam. In consequence, the gas produced by

the updraft gasifiers contains a considerable amount of tar compounds. Hence it is

more suitable for direct heating than engine operation. Figure 2.2 shows a schematic

diagram of updraft gasifier.

Downdraft gasifier

In a co-current gasifier, fuel and gas move in the same direction. The

palletized biofuel, at first dried and pyrolyzed nearly in the absence of air in the upper

zones reaches further down the very hot oxidization zone, from where, changed into

char and ash, it falls into reduction zone. The gases mainly produced in the pyrolysis

zone are heated to fairly more than 1000°C in the oxidation zone. In this process,

high-tar gaseous compounds in the gas are to a great extent converted into low tar

components, which then react with the char in the subsequent reduction zone

producing additional gas. The gas issues from the bottom reactor section, hence the

other designation of downdraft gasification. In contract to counter-current

gasification, the heat transfer between biofuel and gas in co-current gasification is

low, so the exit gas has a relatively high temperature.

There is also a higher tendency of slag formation in co-current than in counter

current gasifiers because of the high temperature in the oxidization zone. A uniform

temperature distribution within the individual reactor zones and a well-formed

preciousness to gas of the char layer are decisive factors for the gas quality. Co-

current gasifiers therefore make greater demand on the fuel preparation with regard to

size and moisture content. The major advantage of downdraft gasifiers is that the gas

produced contains far less tar products and other high-boiling compounds than the gas

from updraft gasifiers. Figure 2.3 shows a schematics diagram of downdraft gasifier.

15

Figure 2.3 Downdraft gasifier

The advantages of downdraft gasification are:

• Up to 99.9% of the tar formed is consumed, requiring minimal or no tar cleanup

• Minerals remain with the char/ash, reducing the need for a cyclone

• Proven, simple and low cost process

The disadvantages of downdraft gasification are:

• Requires feed drying to a low moisture content (<20%)

• Syngas exiting the reactor is at high temperature, requiring a secondary heat

recovery system

• 4-7% of the carbon remains unconverted

For a relatively small size gasifier, it is normally of downdraft gasifier type.

Crossdraft gasifier

Crossdraft gasifiers, schematically illustrated in Figure 2.4 are an adaptation

for the use of charcoal. Charcoal gasification results in very high temperatures

(1500°C and higher) in the oxidation zone which can lead to material problems. In

16

crossdraft gasifiers insulation against these high temperatures is provided by the fuel

(charcoal) it self.

Figure 2.4 Crossdraft gasifier

Advantages of the system lie in the smaller scale which it can be operated.

Installation below 10KW (shaft power) can under certain conditions be economically

feasible. The reason is the very simple gas cleaning train (only a cyclone and a hot

filter) which can be employed when using this type of gasifier in conjunction with

small engines.

A disadvantage of crossdraft gasifiers is their minimal tar converting

capabilities and the consequent need for high quality (low volatile content) charcoal.

It is because of the uncertainly of charcoal quality that a number of charcoal

gasifiers employ the downdraft principal, in order to maintain at least a minimal tar

cracking capability.

Fluidized bed gasifier

The operation of both updraft and downdraft gasifiers is influenced by the

morphological, physical and chemical properties of the fuel. Problems commonly

encountered are; bunker flow, slagging a extreme pressure drop over the gasifier.

17

Figure 2.5 Fluidized bed gasifier

A design approach aiming at the removal of the above difficulties is the

fluidized bed gasifier, illustrated schematically in Figure 2.5.

Air is blown through a bed of sand particles at a sufficient velocity to keep

these in a state of suspension. Air velocity is as larges as 7-10 m ⁄s. The bed is

originally externally heated and the feedstock is introduced as soon as a sufficiently

high temperature is reached. The fuel particles are introduced at the room of the

reactor, very quickly mixed with the bed materials and almost instantaneously heated

up to the bed temperature. As a result of this treatment the fuel is pyrolysed very fast,

resulting in a component mix with a relatively large amount of gaseous materials.

Further gasification and tar conversion reactions occur in the gas phase. Most system

are equipped with and internal cyclone in order to minimize char below out as much

as possible. Ash particles are also carried over the top of the reactor and have to be

removed from the gas stream if the gas is used in engine application.

18

Other types of gasifiers

A number of other biomass gasifier systems (double fired, entrained bed,

molten bath), which are partly spin-offs from coal gasification technology, are

currently under development. In some cases these systems incorporate unnecessary

refinements and complications, in others both the size and sophistication of the

equipment make near term application in developing countries unlikely. For these

reasons they are omitted from this account.

2.3 Biomass resources

2.3.1 Rice husk

Rice is by far the staple food of Myanmar and the major agriculture resource

in terms of area, volume and income. In 2007-2008, Myanmar produced 30 million

Mt of paddy. Rice hulls accounted for 20% of paddy production on a weight basis,

meaning that nearly 6 million Mt of rice hulls were produce in 2007-2008. Annual

production of paddy in Myanmar is given Table 2.1.

Rice husk is composed of water, vaporizing materials by heat and inorganic

materials. The water content in the rice husk is about 10 wt% and it depends on the

drying condition. After drying perfectly, rice husk is composed of about 63 wt% of

vaporizing material, 20 wt% of carbon and 17 wt% of ash. Main component in ash is

SiO2. Then, carbonized rice husk includes about 55 wt% of carbon and 40 wt% of

SiO2. A carbonized rice husk has so large specific surface area as 330 m2/g. A rice

husk looks as show in Figure 2.6.

Figure 2.6 Rice Husk

19

Table 2.1 Annual production of paddy.

(Ref: http://www.moai.gov.mm/statistics.htm#LAND%20POTENTIAL)

Year Production

(000' Mt)

1992-93 14,837

1993-94 16,760

1994-95 18,195

1995-96 17,953

1996-97 17,676

1997-98 16,654

1998-99 17,078

1999-00 20,126

2000-01 21,324

2001-02 21,916

2002-03 21,805

2003-04 23,136

2004-05 24,718

2005-06 27,638

2006-07 30,924

2007-08 30,262

2.3.2 Wood

Wood is the most important carrier of solar energy. It can be processed into

wood logs, wood chip and pellets as shown in Figure 2.7. The most convenient means

of wood processing is the preparation of short logs and split logs for small volume,

hand charged stoves. Fuelwood is widely available in Myanmar. Over 23 million

metric tons of fuelwood were reported used for 1999 domestic consumption (A.

Koopmans, 2005). The majority of fuelwood originated from forests. Any different

between fuelwood demand and the amount forests could supply on a sustainable basis

would lead to deforestation.

20

Myanmar is rich in forest resources. Forest area of the country has been

estimated by forest types as shown in Table 2.2.

Table 2.2 Forest area by types of forests

(Ref: http://www.fao.org/docrep/x2613e/x2613e2p.htm)

No Types of Forests Area (Hectares) %

1. Tidal, beach and dune, and swamp forests 1,376,900 4

2. Tropical evergreen forests 5,507,800 16

3. Mixed deciduous forests 13,425,300 39

4. Dry Forests 3,442,400 10

5. Deciduous dipterocarp forest 1,721,200 5

6. Hill and temperate evergreen forest 8,950,100 26

Total 34,423,700 100

Figure 2.7 Wood

2.3.3 Bamboo

Bamboo is the common term applied to a broad group of woody grasses

ranging from 10 cm to 40 m in height as shown in Figure 2.8. There are over 200

kinds of Myanmar Bamboo. Bamboo is distributed mostly in the tropics, comprising

natural stands of native species. Myanmar is one of the nations with significant

bamboo production and utilization.

21

Villagers rely on bamboo for house pole, cross beam, partition and floor.

Some houses in villages are made of bamboo as a whole. It is also used to construct

fences to protect property and hold livestock. Bamboo utensils such as flat wooden

ladle, blow piper basket, hat, and tray are also common in Myanmar households.

Some lacquer ware has bamboo for a base. It is the raw material for making paper,

and bamboo plants decorate gardens. Bamboo has long been neglected, but it may

have potential as a bioenergy crop. Bamboo productive forest area is 963,000 ha in

Myanmar.

Figure 2.8 Bamboo

2.4 Economic Analysis

2.4.1 Net present value

Net present value (NPV) is defined as the total present value of a time series

of cash flows. NPV is an indicator of how much value an investment or project adds

to the value of the firm. It is a standard method for using the time value of money to

appraise long-term projects. Used for capital budgeting, and widely throughout

economics, it measures the excess or shortfall of cash flows, in present value terms,

once financing charges are met.

Each cash inflow/outflow is discounted back to its present value. Then they

are summed. Therefore NPV is the sum of all terms(1 )

tt

C

r+,

22

(1 )(1 )

t tt t

CC C r

r−

= + =+

(2.8)

∑=

−+

=N

tt

t Cr

CNPV

00)1(

(2.9)

where t - the time of the cash flow

r - the discount rate (the rate of return that could be earned on an investment

in the financial markets with similar risk.)

Ct - the net cash flow (the amount of cash, inflow minus outflow) at time t (for

educational purposes,

C0 is commonly placed to the left of the sum to emphasize its role as the initial

investment.

2.4.2 Internal rate of return

The internal rate of return (IRR) is a capital budgeting metric used by firms to

decide whether they should make investments. It is an indicator of the efficiency of an

investment, as opposed to net present value (NPV), which indicates value or

magnitude. The IRR is the annualized effective compounded return rate which can be

earned on the invested capital, i.e., the yield on the investment.

Given a collection of pairs (time, cash flow) involved in a project, the internal

rate of return follows from the net present value as a function of the rate of return. A

rate of return for which this function is zero is an internal rate of return.

Thus, in the case of cash flows at whole numbers of years, to find the internal

rate of return, find the value(s) of r that satisfies the following equation:

0

0(1 )

Nt

tt

CNPV

r=

= =+

∑ (2.10)

2.4.3 Payback period

The payback is another method to evaluate an investment project. The

payback method focuses on the payback period. The payback period is the length of

23

time that it takes for a project to recoup its initial cost out of the cash receipts that it

generates. This period is some times referred to as" the time that it takes for an

investment to pay for itself." The basic premise of the payback method is that the

more quickly the cost of an investment can be recovered, the more desirable is the

investment. The payback period is expressed in years. When the net annual cash

inflow is the same every year, the following formula can be used to calculate the

payback period.

Payback period = Investment required / Net annual cash inflow* (2.11)

*If new equipment is replacing old equipment, this becomes incremental net annual

cash inflow.

Chapter 3

Methodology

3.1 Energy efficiency

Energy efficiency means using energy wisely and not wasting it. By using

energy efficiently at home and at school, you can help save our planet’s resources and

reduce pollution. It’s easy to do, it saves money, and it helps the earth. Energy

efficiency is a dimensionless number, with a value between 0 and 1 or, when

multiplied by 100, is given as a percentage. The energy efficiency of a process,

denoted by ηenergy, is defined as

in

outenergy P

P=η (3.1)

where ηenergy energy efficiency (%)

Pout output energy (kWh)

Pin input energy (kWh)

3.1.1 System efficiency

For the biomass system, the sensible heat is not utilized and when the gas is

used as fuel in an internal combustion engine. System efficiency, ηTotal of the system

is duel fuel operation is calculated as follow:

100600,3

×

×

×=

LHVQ

PEITotalη (3.2)

where ηTotal system efficiency (%)

PEI electrical power (kW)

Q fuel consumption (m3/hr)

LHV heating value (kJ/m3)

25�

Electrical power was measured by using the multifunctional power meter. Fuels

consumption was measured by used measuring device. Heating value was calculated

by using equation (4.3) and (4.5).

3.1.2 Engine efficiency (ηEng)

Engine generator efficiency, ηEng of the system is duel fuel operation is

calculated as follow:

100100 ×⋅

⋅=×=

efficiencyMortor

efficiencyOverall

Motor

TotalEng η

ηη (3.3)

where ηEng engine efficiency (%)

ηMotor motor efficiency (%)

3.2 Social and economic impacts from field survey

A door to door survey was carried out, as shown in Figure 3.1 and

questionnaires as shown in Appendix D, covering almost all house hold in the study

area, in order to understand the energy sense.

��

Figure 3.1 Field survey in the study area

The following data were collected number of family members, house area,

average monthly income, energy consumption, electricity requirement, etc. It was

found that peak electricity demand occur between 18:00 and 23:00, when villagers are

at home after work. The majority of the demand consists of lighting. They occupation

26�

are Rice, Fishery, Bamboo, Beetle Nut, Agriculture and General Employee. This

village’s household total income is about 130,000 Kyat per house per month.

Villagers are electrified using either small, stand-alone diesel generators or

rechargeable lead acid batteries. They are used simple electric appliances such as light

bulbs, TV (mostly Black & White) and VCD/DVD players. Table 3.1 is show details

of electricity used. These are the peak requirement. It was revealed from survey that

300 light bulbs constitute nearly 50% of total load. Demand of the local community

was estimated to be about 100 kWh/day.

Table 3.1 Details of electricity loads use pattern

Devices Number Load (kW)

Light Bulb 300 9.000

Color Television 5 0.430

Black & White Television 86 3.140

VCD/DVD Player 63 1.535

Radio/music System 4 3.625

Other 4 0.525

Total 462 18.255

Average/household 1.32 0.052

Per capita - 0.012

3.3 Measuring equipment for gasification project

3.3.1 Multifunctional power meter

The multifunctional power meter is used to volt, ampere, power factor and

kW. This meter is shown in Figure 3.2.

27�

Figure 3.2 Multifunctional power meter

3.3.2 AC power clamp meter

AC power clamp meter is measuring DC/AC current, DC/AC voltage,

resistance, continuity check and temperature. The AC power clamp meter used in this

study is shown in figure 3.3.

Figure 3.3 AC power clamp meter

3.3.3 Digital tachometer

The digital tachometer measures the revolutions per minute (RPM) is as

shown in Figure 3.4.

28�

Figure 3.4�Digital tachometer�

�

3.3.4 Measured fuel consumption

The system was tested in dual-fuel operation, to analyze diesel consumption is

one of the important parameters. Diesel fuel consumption was measured by means of

the measuring device (diesel tank with scale) and a stopwatch for different loads. In

the same way, rice husk consumption was measured by means of platform scale is as

shown in Figure 3.5.

Figure 3.5�Platform scale

�

Chapter 4

Distributed Generation System

4.1 Site Selection and Survey

The Energy Research and Development Institute (ERDI), Chiang Mai

University is contracted by Department of Alternative Energy Development and

Efficiency (DEDE), Ministry of Energy, Thailand to oversee the study, development

and installation of an electricity generation system from biomass gasification in Union

of Myanmar. The Myanmar Engineering Society (MES) is the official representative

assigned by the Energy Planning Department (EPD).

A kick-off meeting between the DEDE, ERDI, and MES was held on the 20th

August 2007 in Yangon. Brief information on background and objectives of the

project was delivered. During the meeting, the parties agreed on building

collaboration for this project and forthcoming energy related projects.

The MES has issued a letter suggesting 4 potential sites in the Twantay

Township area for evaluation as shown in Appendix A. The 4 sites are (i) Nyaung Da

Gar, (ii) Sann Ywar, (iii) Kha-Lok, and (iv) Dagoon Daing. They were chosen from a

number of suitable villages that have potential for development and demonstration of

the unit. The ERDI team surveyed and selected a suitable site for the project. The site

selection process consists of site visit, data collection, data interpretation, and

conclusion.

4.1.1 Twantay Township

Twantay township is located 25 km away in the west of Yangon at latitude 16˚

42′ 25″ and longitude 95˚ 56′ 18″, as shown in Figure 4.1. Normal form of transport is

by road with a distance of about 50 km. Most part of the town is green area.

Agriculture, especially rice farming and fishing are main occupations.

The town has plenty of biomass. Among the most suitable biomass resources

include rice husk, rice straw, bamboo and wood.

30� � �

�

Figure 4.1 Twantay Township and road transport to Yangon

4.1.2 Site visit

Sites visit to Twantay Township was undertaken after the kick-off meeting.

Location of the 4 sites can be shown in Figure 4.2. A meeting with local coordinators

was arranged for site investigation.

�

�

Figure 4.2 Location of the four purposed sites

N

31� � �

�

4.1.3 Data collection

Basic data collection was carried out for every site. The data collected is

summarized and shown in Table 4.1. Samples of agricultural residues suitable to use

as fuels were also collected and sent for analysis in Thailand.

4.1.4 Data interpretation

Each item of the data collected was then ranked, based on its influence to the

success of the project. Scale 1 means low influence while Scale 4 is interpreted as

strong influence. Results from the interpretation can be shown in Table 4.2.

4.1.5 Site selection

Dagoon Daing village was selected as shown in Appendix B; the most

favorable of choice based on the total marks earned 52. A large amount of rice husk

available with no cost (3 rice mills in village). They use stove. Fuel types are

firewood, bamboo and rice husk. They occupation are Rice, Fishery, Bamboo, Beetle

Nut, Agriculture and General Employee.

Dagoon Daing village is the most favourable choice based on the total mark

earned. The first important point is that Dagoon Daing village has surplus supply of

the rice husk for their current electricity need. In addition, the surplus is enough for

the next few year of predicted electricity consumption. Dagoon Daing community had

shown that they are ready and willing to support the project in every possible ways

through their leaders to make the project a successful and sustainable one.

The project is an exemplary and model for contribution of technical scope to

extend other areas in development stage. The selection of designated location is based

on considerations with accessible to travel and populated, locally well-collaborate and

able to set a centre of technical cooperation, efficient to share information related with

project to others extend area and resourceful raw materials.

32� � �

�

33� � �

�

34� � �

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Table 4.2 Weighting and decision making table

Community name Nyaung Da

Gar Dagoon Daing Kha-Lok

Sann Ywar

1. Road distance from Yangon 3 1 2 4 2. Other facilities or industries in the community

4 3 2 1

3. Biomass available

3.1 Rice husk 3 4 1 2 3.2 Bamboo 4 1 2 3 3.3 Rice straw 2 4 1 3 3.4 Wood 2 4 3 1 4. Road condition surrounding the area for biomass transportation

1 4 2 3

5. Estimated electricity consumption

5.1 Current 3 4 2 1 5.2 Future 1 4 2 3 5.3 No. of household 3 4 2 1 6. Energy data of each site

6.1 Price of diesel 4 2 1 3 6.2 Availability of diesel 3 2 1 4 6.3 Experience with electricity 3 4 2 1

7. Attitude and eagerness of the community to support the project

7.1 Leader 3 4 1 2

7.2 Villagers 2 4 3 1

7.3 Basic knowledge in management and technical support

4 3 1 2

Total Mark Earn 45 52 28 35

35� � �

�

4.2 Biomass Analysis

4.2.1 Potential biomass as fuels in Myanmar

From the survey, potential biomass resources available in Dagoon Daing are

wood, bamboo, rice straw and rice husk, as shown in Figure 4.3. Samples of these

biomass fuels were collected and later sent for proximate and ultimate analyses,

heating value, density, ash composition and ash fusion temperature.

Figure 4.3 Potential biomass resources

4.2.2 Fuel Analysis Methods

Two types of analyses are proximate and ultimate analysis. These are useful

for defining the physical, chemical and fuel properties of a particular biomass

feedstock. These analyses were initially developed for coal and widely available from

commercial laboratories. They are described in detail in the publications of the

American Society for Testing Materials (ASTM).

The proximate analysis is relatively simple and can be performed with a

drying oven, a laboratory furnace and a balance. The ultimate analysis involves more

advance chemical techniques.

The proximate analysis determines the moisture, volatile matter, ash and fixed

carbon contact of a fuel, using standard ASTM tests. Moisture is analyzed by the

weight loss observed at 110˚C. The volatile matter is driven off in a closed crucible by

slow heating to 950˚C and the sample is weighed again. The proximate analysis

generally includes moisture content measured on a wet basis, MCwet, where

MCwet = (wet weight – dry weight) / wet weight (4.1)

36� � �

�

Sometimes, moisture content is reported on a dry weight basis, MCdry, where

MCdry = (wet weight – dry weight) / dry weight (4.2)

The ultimate analysis gives the chemical composition and the higher heating

values of the fuels. The chemical analysis usually lists the carbon, hydrogen, oxygen,

nitrogen, sulfur and ash content of the dry fuel on a weight percentage basis. A

standard ASTM method is available for measuring the slagging temperature for ash.

The heat of combustion is determined by the composition of the biomass and

in fact can be calculated with considerable accuracy from

HHV = [34.1 C + 132.2 H + 6.8 S – 1.53 A – 12.0 (O + N)] kJ/g (4.3)

HHV = [146.6 C + 568.8 H + 29.4 S – 6.6 A – 51.5 (O + N)] x 10² Btu/lb (4.4)

LHV = HHV – 0.00114 (HHV) (MC) (4.5)

Where C, H, S, A, O and N are the wt% of carbon, hydrogen, sulfur, ash,

oxygen and nitrogen in the fuel. The calculate value agree with the measured value

with an absolute error of 2.1% for a large number of biomass materials.

One of the most important physical characteristic of biomass fuel is the bulk

density. The bulk density is the weight of biomass packed loosely in a container

divided by the volume occupied. Clearly, it is not an exact number, depending on the

exact packing of the particles.

The basis fuel parameters important in gasifier design are

- Char durability and fixed carbon content

- Ash fusion temperature

- Ash content

- Moisture content

- Heating value

The choice of a fuel for gasification will in part be decided by its heating

value. The method of measurement of the fuel energy content will influence the

37� � �

�

estimate of efficiency of a given gasification system. Reporting of fuel heating values

is often confusing since at least three different bases are used:

- fuel higher heating values as obtained in an adiabatic bomb calorimeter. These

values include the heat of condensation of the water that is produced during

combustion. Because it is very difficult to recover the heat of condensation in actual

gasification operations these values present a too optimistic view of the fuel energy

content;

- fuel higher heating values on a moisture-free basis, which disregard the actual

moisture content of the fuel and so provide even more optimistic estimates of energy

content;

- fuel higher heating values on a moisture and ash free basis, which disregard the

incombustible components and consequently provide estimates of energy content

too high for a given weight of fuel, especially in the case of some agricultural

residues (rice husks).

The only realistic way therefore of presenting fuel heating values for

gasification purposes is to give lower heating values (excluding the heat of

condensation of the water produced) on an ash inclusive basis and with specific

reference to the actual moisture content of the fuel.

The heating value of the gas produced by any type of gasifier depends at least

in part on the moisture content of the feedstock. Moisture content can be determined

on a dry basis as well as on a wet basis. High moisture contents reduce the thermal

efficiency since heat is used to drive off the water and consequently this energy is not

available for the reduction reactions and for converting thermal energy into chemical

bound energy in the gas. Therefore high moisture contents result in low gas heating

values. In downdraft gasifiers high moisture contents give rise not only to low gas

heating values, but also to low temperatures in the oxidation zone, and this can lead to

insufficient tar converting capability if the gas is used for engine applications. The gas

heating value (engines need gas of at least 4200 kJ/m³ in order to maintain a

reasonable efficiency) and of the tar entrainment problem, downdraft gasifiers need

reasonably dry fuels (less than 25 percent moisture dry basis).

The amount of volatiles in the feedstock determines the necessity of special

measures (either in design of the gasifier or in the layout of the gas cleanup train) in

38� � �

�

order to remove tars from the product gas in engine applications. A general rule if the

fuel contains more than 10 percent volatile matter it should be used in downdraught

gas producers.

Ashes can cause a variety of problems particularly in up or downdraft

gasifiers. Slagging or clinker formation in the reactor, caused by melting and

agglomeration of ashes, at the best will greatly add to the amount of labour required to

operate the gasifier If no special measures are taken, slagging can lead to excessive tar

formation and complete blocking of the reactor. A worst case is the possibility of air-

channeling which can lead to a risk of explosion, especially in updraft gasifiers.

Bulk density is defined as the weight per unit volume of loosely tipped fuel.

Fuels with high bulk density are advantageous because they represent a high energy-

for-volume value. Consequently these fuels need less bunker space for a given

refueling time. Low bulk density fuels sometimes give rise to insufficient flow under

gravity, resulting in low gas heating values and ultimately in burning of the char in the

reduction zone. Inadequate bulk densities can be improved by briquetting or

pelletizing.

4.3 Biomass Gasification System

The biomass gasification system is to produce electricity from rice husk. The

system consists of Downdraft gasifier reactor, cyclone separator, water scrubber, gas

cooler, Carbon fiber filter, fine filter units and gas damper as shown in Figure 4.4.

Figure 4.4 Rice Husk Gasification System�

39� � �

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4.3.1 Downdraft gasifier system

In a downdraft reactor, biomass is fed at the top, and the air intake is at the top

as shown in Figure 4.5. The reactor wall was made of firebrick. Air is supplied by

means of a downstream suction blower or from an engine. The gasifier core was not

provided with any throat or constriction to avoid fuel flow problem. Ash formed was

removed from the gasifier continuously by an automatic, motor-driven ash removal

system.�

Figure 4.5 Downdraft Grasifier�

4.3.2 Cyclone separator

The purpose of using cyclone is to remove tar and dust from the gas, the

design is shown in Figure 4.6. It is the most extensively used type of collector for

relatively coarse dusts because of high operational efficiency, simple construction and

low maintenance cost. The separated dust leaves the cyclone at its base and the gas

escapes at the top through a central exit. In cyclone the gas first flows along the wall

in the direction of the apex, and then is reversed in direction and escape axially, whilst

the dust moves with the outer current towards the apex.

40� � �

�

Figure 4.6 Cyclone

4.3.3 Venturi scrubber

The velocity of the contacting liquid both pumps and scrubs the entrained gas

in an ejector venturi scrubber, as shown in Figure 4.7. Spiral spray nozzles impact

axial and tangential velocities to the liquid jet. The contacting liquid must be removed

after the scrubber by a suitable entrainment separator. Producer gas was passed

through venturi scrubber to remove ashes and to condense tars.

Figure 4.7 Venturi scrubber

41� � �

�

4.3.4 Gas cooler

Figure 4.8 Gas cooler

Gases from the venturi scrubber were fed into the gas cooler. The cooler was

filled with marbles (1″ or 0.254m diameter). On the top of this unit, there was a

shower of cooling water. Water condensation helps to remove tar particles but yields a

contaminated water condensate in the process. The detail drawing of the gas cooler is

shown in Figure 4.8.

4.3.5 Carbon fiber filter

Figure 4.9 Carbon fiber filter

42� � �

�

In the packed column some amount of water got entrained in the form of mist

or droplets and was carried away by the gas. Also, some fine particulates still

managed to get carried away with this gas. Pebbles of 1″ diameter size were used in

the filter, as shown in Figure 4.9.

4.3.6 Fine filter unit

Gases from the carbon fiber filter were fed into this filter. This is the final

mechanical filter which was filled with sawdust. The detail drawing of the gas cooler

is shown in Figure 4.10. The packed bed materials were used to absorb additional tar,

dust and vapors to get dry and clean gas. There are needs for periodic changing of the

packing materials.

Figure 4.10 Fine filter unit

4.3.7 Gas damper

After passing the sawdust filter, the cleaned and cooled gas entered the gas

damper, as shown in Figure 4.11.

43� � �

�

Figure 4.11 Gas damper

4.3.8 Water pump

A water pump was used for spraying the water in the cleaning and cooling

system. The water pump (1 HP) is shown in Figure 4.12.

Figure 4.12 Water pump

44� � �

�

4.4 Electrification System

The electrification system installed consists of three main parts, which are

engine, generator and electric control panel.

4.4.1 Engine

The engine used in the system is 4-cylinder, 2800 CC Mitsubishi 4M40, as

shown in Figure 4.13. The engine was modified so that it can use both diesel and

producer gases produced by the gasifier. An automatics governor is used to determine

the amount of diesel used to keep the engine speed at 1500 RPM at all load, as shown

in Figure 4.14.

Figure 4.13 Engine

Figure 4.14 Automatic governor

45� � �

�

4.4.2 Generator

The generator installed is the Jewelway, Model JWX-50-4, 50 kW generator

as shown in Figure 4.15. The produced electricity is 3 phase, 50 Hz. Maximum

current is 90.2 Amp as indicated on the nameplate as shown in Figure 4.16.

Figure 4.15 Generator

Figure 4.16 Generator nameplate

46� � �

�

4.4.3 Electric control panel

The electric control panel serves 2 purposes. The first task of the panel is to

prevent any failure that may occur during operation. Four circuit breakers were

installed. The second task of the panel is to monitor the electricity produced. There

are four meters installed, which are Volt meter, Frequency meter, Current meter and

kWh meter. The panel is as shown in Figure 4.17.

Figure 4.17 Electric control panel

4.5 Building

Figure 4.18 Picture of the building

47� � �

�

A building was constructed on site to house the electrification system, control

room and store biomass with floor area of 56 m², as shown in Figure 4.18.

4.6 System installation, Wiring and Testing

This is described installation of the system inside the building, as well as

erection of electricity poles and wiring from the electrification system to villagers’

households.

4.6.1 System installation

Figure 4.19 Installation of the gasification system inside the building

The gasifier system is installed in side the building, as shown in Figure 4.19.

There are three main areas, gasifier-engine-generator system, control room and

biomass storage room.

4.6.2 Electricity wiring and network

The power plant is located near the centre of the village. Lamp posts and

power poles were erected with assistance from the villagers and electricity

distribution lines were connected from the power plant to households in the village

48� � �

�

under supervision of qualified engineers and electricians. Each house was provided

with a 20 W lambs as well as a switch. The network covered about 350 houses. About

40 lambs were also installed on concrete poles for road lighting. Details are shown in

Figure 4.20, 4.21, 4.22 and 4.23.

Figure 4.20 Electricity distribution lines and power plant location in the village

49� � �

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Figure 4.21 Three-phase electricity lines from the system building

Figure 4.22 Electricity poles along the main road

Figure 4.23 Lamp posts along the main road

50� � �

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4.6.3 System operation

The system operation consists of three parts, which are preparation, system

operating procedures and maintenance.

4.6.3.1 Preparation

Rice husk should be stored in the storage room to keep it away from moisture,

as shown in Figure 4.24. There should be enough rice husks for one week operation.

Figure 4.24 Rice husk storage

Make sure that rice husk level is not lower than the level in Figure 4.25 at all

time.

Figure 4.25 Rice husk level

51� � �

�

Make sure the water level in the pond and the dust collector are as indicated in

Figure 4.26. The water must be replaced once a month.

Figure 4.26 Water level in the circulating pond and the dust cooler

Always check the lubricant oil level, diesel level and cooling water everyday

before starting the engine as shown in Figure 4.27. The lubricant oil must be replaced

once a month. Make sure that the radiator is filled with water to prevent the engine

from overheating.

Figure 4.27 Radiator, diesel and lubricant oil tanks

4.6.3.2 System operating procedures

Before starting the engine, the control panel must be turn off. The air control

valve must be open as shown in Figure 4.28.

52� � �

�

Figure 4.28 Air control valve

Starting the engine, turn the key to ON position. The green indicator must be

brightening up, as shown in Figure 4.29. Turn the key to START position. The engine

should be started. Wait 3-5 minutes, and then turn on the generator.

Figure 4.29 The key of starting engine

After the engine started for 3-5 minutes, the reactor can be ignited. As soon as

the reactor is ignited, starting closing the air control valve to reduce fresh air from

outside to the engine. Downing the air from the top of the reactor will accelerate the

reaction. Turn on water pump.

53� � �

�

After 15-20 minutes, the producer gases are ready they can be fed into the

engine to replace diesel consumption. Care must be taken while replacing diesel with

the producer gases. Make sure that the transition is smooth. One good indicator is that

the noise of the engine must be stable and the frequency of the electricity is between

48-52 Hz. Turn on the automatic ash removal system as shown in Figure 4.30.

Figure 4.30 Ash removal system

Finally turn off the reactor, turn off the ash removal system and the water

pump. Open the air control valve to let the fresh air into the engine and turn off the

engine. Fill the reactor with rice husk to the 1/3 of the reactor height. This will keep

the heat inside the reactor for next operation.

4.6.3.3 Maintenance

Daily maintenances are;

- Check the water levels in the pond and the dust collector

- Check diesel level, lubricant oil and water level inside the radiator

- Remove the ash floating at the pond and the tray, Figure 4.31

- Listen to the sound of the motors

- Check the electricity cable before starting the system

- Record the amount of diesel and rice husk used.

54� � �

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Figure 4.31 Ash at the pond and the tray

Monthly maintenances are;

- Remove all rice husk inside the reactor and clean the inside the reactor

- Clean all the inner of the pipe by removing any dust and tar

- Replace water in the pond

- Replace the rice husk and pebbles inside the filters, Figure 4.32.

Figure 4.32 Filters

4.6.3.4 The treatments and recycling program to the waste products

• Ashes, the products of down load gasifier, are utilized in Agriculture as raw for

fertilizers.

• The tars which output from cyclone separator are using as a paints in boats for

external cover to protect weathering.

55� � �

�

• The Marbles are using in gas cooler coated with tars will be cleaned and

recycling.

• The pebbles which are exhausted after running hours 200 in the carbon fiber

filters will be collected and applying in road construction.

• There have to manage the saw dusts coated with tars from the yield of fine filter

unit. There are applicable as filling agents and applying as putty in industries.

4.7 Test runs

The system has been tested to generate electricity to the villagers since 20

November 2007. It is scheduled to operate in the evening from 18:00 to about 24:00

everyday.

Chapter 5

Results and Discussions

5.1 Technical results

Site selection and survey, biomass analysis, the construction of biomass

gasification system and test run operation had been performed in 2007-08.

5.1.1 Biomass fuel analysis

The potential biomass samples were analyzed. Results are shown in Tables

5.1-5.3 and Appendix C, for ultimate, proximate and ash analyses, respectively. From

the results obtained, it was found that the most suitable biomass fuel is rice husk. It

has heating value of 13.8 MJ/kg, with high fixed carbon content. Its ash content is

mainly SiO2 with highest ash melting temperature among the fuels considered.

Table 5.1 Ultimate Analysis

Rice husk Bamboo Wood Rice straw

C 35.145 % 45.66 % 44.925 % 39.875 %H 3.706 % 4.32 % 4.935 % 5.1165 %N 0.211 % 0.243 % 0.188 % 0.594 %S 0.1215 % 0.064 % 0.074 % 0.216 %O 60.438 % 48.329 % 49.616 % 53.829 %

Table 5.2 Proximate analysis, heating value and density

Sample Heating Value

(MJ/kg)

Proximate analysis (as received, % wt/wt)

bulk

density

(kg/m3) moisturevolatile

matter ash

fixed

carbon

1 Bamboo 17.8 5.73 74.68 5.55 14.04 1,720

2 Rice straw 15.3 7.76 65.58 12.44 14.22 nd

3 Rice husk 13.8 5.60 56.41 13.45 24.54 nd

4 Wood 16.4 7.49 74.82 6.36 11.33 1,910

nd = not determined

57�

�

Table 5.3 Ash analysis

Sample Bamboo Rice

Straw Rice husk Wood

1. Ash Composition (%) Fe2O3 3.68 0.76 1.20 3.24Al 2O3 4.79 2.42 0.14 5.57MgO 5.92 1.87 0.64 5.85SiO2 44.08 72.73 88.72 43.24CaO 23.09 5.40 3.92 23.43K2O 12.69 12.87 2.58 12.21Na2O 0.44 0.24 0.25 1.73TiO2 0.28 0.01 0.07 0.29

Mn3O4 0.10 0.78 0.09 0.37SO3 1.61 0.28 0.00 2.39

2. Ash Fusion Temperature (ºC) 2.1 Initial Deformation Temperature 1,142 1,000 1,440 1,1382.2 Softening Temperature 1,152 1,194 1,500 1,1382.3 Hemispherical Temperature 1,163 1,220 >1,500 1,1892.4 Fluid Temperature 1,178 1,268 >1,500 1,205

5.1.2 System testing

During the test run at varying load, it was found that producer gas from rice

husk can replace diesel of up to 70%. Results are shown in Figure 5.1-5.5.

I=Electrical Current (Amp)

Figure 5.1 Electrical current and power�

58�

�

�

V=Electrical Voltage (Volt)

Figure 5.2 Electrical voltage and power

�

PF=Power Factor

Figure 5.3 Power factor and power

�

59�

�

�

Figure 5.4 Relationship between power generated and rice husk consumption

�

�

Figure 5.5 Relationship between power generated and diesel consumption

Figure 5.4 and 5.5 shows that at 31.28 kW electricity generate, rice husk and

diesel consumption rate was 32.64 kg/hr and 2.17 L/hr, respectively as shown in

Table 5.4. With only diesel operation, diesel consumption rate was 7.39 L/hr. More

than 70% saving in diesel was achieved with the rice husk gasification system.

Electricity consumption in the villages at different loads result is shown in Table 5.5.

60�

�

Table 5.4 Properties of rice husk at different loads

Power (kW) Rice husk consumption (kg/hr) Diesel consumption (L/hr)

10 13.00 1.72

15 17.50 1.80

21 21.50 2.00

25 28.00 2.08

31 36.50 2.17

Note:measurements made at a diesel substitution rate by producer gas of 65 %

Table 5.5 Electricity consumption in the villages at different loads

Electricity phase 1

I1 23.5 33.5 45.1 50.3 59.1 Amp

V23 205 210 211 212 214 Volt

Power Factor 0.65 0.76 0.78 0.81 0.83

Power 1 3.131 5.347 7.423 8.63810.5 kW

Electricity phase 2

I2 25.2 35.2 46.4 52.2 61.5 Amp

V13 206 208 211 214 218 Volt

Power Factor 0.68 0.71 0.7 0.72 0.76

Power 2 3.53 5.198 6.853 8.04310.19 kW

Electricity phase 3

I3 26.3 31.5 40.3 48.6 56.4 Amp

V12 207 215 215 220 221 Volt

Power Factor 0.69 0.71 0.79 0.81 0.85

Power 3 3.756 4.808 6.845 8.66110.59 kW

Total power (P1 + P2 + P3) 10.42 15.35 21.12 25.34 31.28 kW

The engine testing was performed by fixed the engine speed at 1500 rpm. The

electricity load was applied respectively at different power (kW).

61�

�

Fuel consumption rate (fc)

600,311

×××=Ricehusk

MatchEngine

c LHVPf

η (5.1)

where fc fuel consumption rate (kg/hr)

ηEng engine efficiency (~0.25)

PMatch power (kW)

LHVRice husk rice husk heating value = 13,800 kJ/kg

From (5.1), 600,3800,13

128.31

25.0

1×××=cf

hrkgfc 64.32=

Diesel substitution rate by producer gas

100})()(

)(1{% ×

+−=

RicehuskDiesel

Diesel

QLHVQLHV

QLHV

ρρρ

(5.2)

where % percentage substitute

ρ density (kg/m3)

Q flow rate (m3/hr)

LHV heating value (MJ/kg)

Operating at 1,500 rpm found that,

QDiesel = 7.39 L/hr QRicehusk = 53.76 L/hr

LHVDiesel = 43.0 MJ/kg LHVRicehusk = 13.8 MJ/kg

ρDiesel = 850 kg/m3ρRicehusk = 679 kg/m3

From (5.2), 100})8.1376.53679()4339.7850(

)4339.7850(1{% ×

××+××××

−=

62�

�

10.65% =

The percentage of diesel substitution rate by producer gas from rice husk

gasification was 65.1% on an energy basis for all power output levels considered.

System efficiency (ηTotal)

100600,3

×

×

×=

LHVQ

PEITotalη (3.2)

where ηTotal system efficiency (%)

PEI electrical power (kW)

Q fuel consumption (m3/hr)

LHV heating value (kJ/m3)

At 1,500 rpm and PEI = 31.28 kW

QDiesel = 2.17 L/hr QRicehusk = 53.76 L/hr

LHVDiesel = 43,000 kJ/kg LHVRicehusk = 13,800 kJ/kg

ρDiesel = 850 kg/m3ρRicehusk = 679 kg/m3

From (3.2), 100)()(

600,3×

×+×

×=

RicehuskDiesel

EITotal LHVQLHVQ

Pη

100)800,1376.53()000,4317.2(

600,328.31×

×+××

=Totalη

%48.13=Totalη

Engine efficiency (ηEng)

100100 ×⋅

⋅=×=

efficiencyMortor

efficiencyOverall

Motor

TotalEng η

ηη (3.3)

63�

�

where ηEng engine efficiency (%)

ηMotor motor efficiency (%)

At 1,500 rpm system efficiency is 13.49 % and generator efficiency is 90 %

From (3.3), 10090

49.13100 ×=×=

Motor

TotalEng η

ηη

%98.14=Engη

The engine efficiency with dual fuel operation achieved was 14.98%, while

pure diesel operation gave 39.32% efficiency for the same load.

Electricity generation cost (EGC)

After installation of the system, fuel consumption rate, operating hour, power

demand from the local community were evaluated. This information was used to

calculate unit base cost of electricity. The electricity generation cost can be

determined from:

Pt

cccmEGC MLff ++∑

= (5.3)

where EGC electricity generation cost (kyat/kWh)

mf fuel mass consumption for both diesel and rice husk (L, kg)

cf fuel cost for both diesel and rice husk (kyat/L, kyat/kg)

cL total labor costs (kyat)

cM total maintenance costs (kyat)

P power (kW)

t the specified operation time (hr)

64�

�

At 4 hr/day between 1800 – 2200 rpm,

mf (Rice husk) is 32.64 kg/hr (Rice husk is obtained at no cost since it is

available free within the local community.)

mf (Diesel) = 2.17 L/hr

cf (Diesel) = 1100 kyat/L

cL = 200,000 kyat/month x month/30day x day/ 4hr

= 1,666.67 kyat/hr

cM = 50,000 kyat/month x month/30day x day/ 4hr

= 416.67 kyat/hr

P = 31.28 kW

t = 4 hr

From (5.3), 128.31

67.41667.666,1)110017.2(

×++×

=EGC

kWhkyatEGC /91.142=

Expenses in comparison between electricity generation from diesel and duel

fuel as shown in Table 5.6. It was found that with diesel operation, cost was about

326.83 Kyat/kWh but if dual fuel operation was used, this would be 142.91

Kyat/kWh. A saving of about 55% can be obtained. It is most likely that villagers in

Dagoon Daing are able to sustainably run the system with minimum electricity cost.

Electricity cost is calculated as follows:

A household with a 20 W lamb switching on 4 hours a day, it will need

electrical power = 20 x 4 x 30 / 1,000 = 2.40 kWh/month

electricity payment = 142.91 x 2.40 = 342.99 Kyat/month

65�

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Table 5.6 Comparison of electricity cost between diesel and dual fuel operation

No Electricity cost Diesel Dual fuel Unit

1

Diesel price in Myanmar 1,100.00 1,100.00 kyat/L Diesel fuel consumption

rate 7.40 2.17 L/hr

Cost 976,800.00 286,440.00 kyat/month 2 Labor cost 200,000.00 200,000.00 kyat/month 3 Maintenance cost 50,000.00 50,000.00 kyat/month

Total cost (30 days) 1,226,800.00 536,440.00 kyat/month Electricity generation cost 326.83 142.91 kyat/kWh

For running 4 hour per day of the unit (output power electricity is 31.28 kW

per day), the consumption rate of rice husk is 53290 kg/yr and diesel 3168.2 liter/yr.

Waste water analysis

Waste water from the system, water was collected and sent for analysis.

Results are shown in Table 5.7.

Table 5.7 Waste water analysis

Parameter Value Standard

Temperature 24.40 Maximum 3ºC above ambient

Acidity 7.78 5.5-9 Total COD 6,089.00 400 COD after filteration 787.00 … BOD … 60 Total solid 3,842.00 3,000 Volatile solid 1,627.00 … Suspended solid 1,699.00 200 Suspended volatile solid

814.00 …

Nitrogen 131.00 200 Phosphorus 23.00 …

From the results obtained, the water appeared to have high solid content and

COD value above standard. The water should therefore be treated before discharge.

66�

�

1. Primary treatment

This is a physical process to separate impurity from the water which may be

done by conditioning and sedimentation.

2. Secondary treatment

This is to remove organic and suspended matter from the water by biological

or chemical processes such as aeration.

3. Tertiary treatment

Further treatment such as Ultra filtration reverses osmosis, activated carbon,

ion exchange, etc.

The system has a water pond for suspended solid to settle and sediment on the

bed. Primary solid separation was done. The water from the pond was pumped to a

second pond for further treatment before release to surrounding bamboo bushes.

5.2 Socio-economic impacts

The 4 members of the village who have some technical skills have been

trained about the operation, and maintenance of the system as shown in Figure 5.6.

They had a hand-on experience with a similar system in other site. With the system

installed at the village, the 4 members have operated the system on their own under

close supervision by skilled engineers and technicians. They have been able to operate

the system with no trouble. Skilled engineers and technicians can be called on for

future consultation.

After installation of lamb posts and household lighting, Children and adults

can read after sunset. Previously, candles or oil lambs were used but the brightness

was not high enough. With a fluorescent lighting, it is easier and more convenient to

read as shown in Figure 5.7.

Lighting installed on the main road enabled a safer for dangerous like snake

bites when they come back from their farms at night and travel in village.

Villagers enjoy evening activities such as karaoke singing, movie, snooker and

TV as shown in Figure 5.8-5.9. Previously, each household had their own battery or

diesel engine generators which were expensive.

67�

�

From a field survey, questionnaires and interviewing, it was found that most

are farmers with number of members of 6-8 and monthly income of about 130,000

kyat/family. Now, their incomes are raised because new activities, new jobs and new

business are created for villagers.

�

Figure 5.6 Operators in action

Figure 5.7 Lighting for extra reading at night

68�

�

Figure 5.8 Snooker game at night

��

Figure 5.9 Evening entertainment

5.3 Other impacts

When they increase their individual income after project, it can affect

indirectly to other impacts as higher knowledge, higher education, and they can create

higher living standard and finally they can manage their healthy lives.

�

�

Chapter 6

Conclusions and Recommendations for Future Works

6.1 Conclusions

Myanmar has enormous potential of biomass sources that can be utilized to

increase the growing demand of energy. Biomass gasification technology could be

suitable for the rural grid electrification. Therefore, a literature survey of small scale

distributed power generation unit with biomass gasification technology has been

carried out. Suitable technology has been recognizing for a remote village area in

Myanmar.

The Myanmar Engineering Society has issued a letter suggesting 4 potential

sites and site survey has been undertaken. The 4 sites are (i) Nyaung Da Gar, (ii) Sann

Ywar, (iii) Kha-Lok, and (iv) Dagoon Daing in the Twantay Township about 50km

from Yangon. The most suitable village is Dagoon Daing to be used as a site for the

project. The village has over 300 households.

Biomass samples available around Dagoon Daing area were collected. They

were wood, rice straw, rice husk and bamboo. The sampled were sent for proximate,

ultimate analyses, heating value, density, ash composition and fusion behavior

determination. Rice husk was later identified as an appropriate biomass to be used as

fuel in the gasifier-engine-generator system.

A 50 kW biomass gasifier-engine-generator system to produce electricity was

constructed and commissioned. The system consists of Downdraft gasifier reactor,

cyclone separator, water scrubber, gas cooler, Carbon fiber filter, fine filter units and

gas damper. The system is housed under a 56 m2 building that is partitioned into

operation area, control room and fuel storage room.

Electrical poles were erected along the village‘s main road. Wiring and

network were connected from the power plant to about 350 households. A 20 W light

bulb and switch were given for free to each house. 40 lambs were also installed on top

of the poles for road lighting.

70�

�

The system has been operated since 20 November 2007. It was scheduled to

run from 1800–2400 pm, everyday. Preliminary results showed that the system can be

operating without any trouble. Start-up and shut-down can be done with ease. Rice

husk consumption was measured to be about 32.64 kg/hr at 31.28 kW load. A diesel

substitution rate of 65.11 % was obtained with overall system efficiency of 13.49 %.

The system can be run without major problem.

There is a great opportunity to generate electricity for households and other

productive activities. The rural grid electrification project was found to contribute to

upgrading the living standards of villagers in term of quality of life, longer study hour,

safer environment and improved productive and income-generating activities.

6.2 Recommendations

If village committee can construct the private rice mill, they will get enough

rice husks from this mill because they will need to buy more rice husk from other rice

mills in the future.

Since the installed capacity of 50 kW can be distributed by this project, this

can extend to the neighbor villages for lighting because the present electricity

consumption in the village is 31.28 kW.

Before starting the project, they cost about 15,000 kyat/month for lighting.

But, the can reduce their cost about 2,000 kyat/month after project. So, the economic

benefit becomes 86.67% per month safer than before project in term of lighting.

By using electricity after project, it can reduce air pollution in these

environments because they don’t need to use candles and oil lamps. On the other

hand, they can posses more healthy lives because of lighting.

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Group on Non-Conventional Energy Research, (13-15 October 1986),

PENANG, MALAYSIA

P. Quaak, H. Knoef, H. Stassen, Energy from Biomass: A Review of Combustion and

Gasification Technologies, World Bank Technical Paper; 422. (1998), Energy

Series, ISBN 0-8213-4335-1

N. H. Ravindranath, H. I. Somashekar, S. Dasappa and C. N. Jayasheela Reddy,

Sustainable biomass power for rural India: Case study of biomass gasifier for

village electrification, Current Science, VOL. 87, NO. 7, page 932-941.

T. B. Reed and Agua Das, Handbook of Biomass Downdraft Gasifier Engine Systems,

(1988), SERI/SP-271-3022

K. Senelwa, Ralph E.H. Sims, Opportunities for small scale biomass-electricity

systems in Kenya, Biomass and Bioenergy 17 (1999) 239-255

S.K. Singal, Rural Electrification of a Remote Island by Renewable Energy Sources,

Renewable Energy 32 (2007) 2491-2501

H. E. Stassen, Small-Scale Biomass Gasifiers for Heat and Power, A Global Review,

World Bank Technical Paper Number 296, Energy Series, (1995), ISSN:

0253-7494

�

� 73

Tin, Franco-ASEAN Seminar on “Powering ASEAN: Technology and Policy

Options” Bangkok (6-7 September 2007) Country Report of MYANMAR

http://www.jgsee.kmutt.ac.th/seminar_programme/DAY 2/Country Report 2/Tin -

Myanmar-Presentation.pdf

�

Appendix A

Nomination of Potential Sites

� 75

� 76

Appendix B

Selection of Dagoon Daing Village

� 77

� 78

Appendix C

Biomass Fuel Analysis Results

� 79

� 80

1.1 Heating value and % sulfur

AnalysisNo.

bamboo rice straw rice husk wood

Hg(cal/g) %S Hg(cal/g) %S Hg(cal/g) %S Hg(cal/g) %S

1 4557.00 0.47 3632.46 0.68 3339.87 0.05 3997.30 0.07

2 3987.01 0.41 3684.06 0.75 3212.75 0.04 3895.04 0.05

3 4641.03 0.43 3809.77 0.81 3189.70 0.05 3869.32 0.08

4 3887.21 0.38 3638.26 0.71 3729.67 0.05 3846.64 0.04

5 4565.25 0.49 3859.56 0.77 3349.89 0.05 4017.01 0.09

6 3786.30 0.38 3304.98 0.72 3349.64 0.03 3845.39 0.05

7 3894.12 0.39 3629.56 0.80 3217.01 0.05 4191.30 0.07

8 3968.30 0.43 3726.69 0.71 3219.52 0.03 3788.14 0.05

9 4778.10 0.49 3929.56 0.79 3410.60 0.05 3859.10 0.0 5

10 4657.79 0.39 3342.99 0.73 3129.45 0.03 3904.18 0.0 7

AV 4272.21 0.43 3655.79 0.75 3314.81 0.04 3921.34 0.06

� 81

1.2 Moisture

SampleCrucible

No.

Crucible

Weight

(g)

Total Crucible

+ Sample (g)

Sample weight before

oven (g)

Total weight

Crucible + Sample after oven (g)

Sample weight after

oven (g)

% moisture

AV

% moisture

Wood

1 32.80 33.80 1.00 33.72 0.08 7.73

7.49

2 35.80 36.80 1.00 36.73 0.07 7.35

3 37.34 38.34 1.00 38.27 0.07 7.39

4 27.78 28.78 1.00 28.70 0.09 7.29

5 29.79 30.79 1.00 30.71 0.08 8.61

6 34.80 35.80 1.00 35.72 0.10 8.53

7 32.80 33.80 1.00 33.73 0.04 7.65

8 38.87 39.88 1.00 39.80 0.07 6.83

9 39.41 40.41 1.00 40.34 0.08 6.67

10 36.80 37.80 1.00 37.73 0.08 6.85

� 82

Sample

Crucible

No.

Crucible

Weight

(g)

Total Crucible

+ Sample (g)

Sample weight before

oven (g)

Total weight

Crucible + Sample

after oven (g)

Sample weight after

oven (g)

% moisture

AV

% moisture

Bamboo

1 42.31 43.31 1.00 43.25 0.06 5.94

5.73

2 32.31 33.32 1.00 33.26 0.06 5.77

3 37.14 38.14 1.00 38.08 0.06 5.71

4 58.02 59.04 1.01 58.99 0.05 5.85

5 46.78 47.78 1.01 47.73 0.05 5.59

6 51.60 52.61 1.01 52.55 0.05 5.59

7 33.31 34.32 1.00 34.26 0.07 5.97

8 41.96 42.96 1.01 42.91 0.06 5.75

9 46.78 47.78 1.01 47.73 0.05 5.69

10 36.14 37.14 1.00 37.08 0.05 5.41

� 83

SampleCrucible

No.

Crucible

Weight (g)

Total Crucible

+ Sample (g)

Sample weight before

oven (g)

Total weight

Crucible + Sample

after oven (g)

Sample weight after

oven (g)

% moisture

AV

% moisture

Rice husk

1 33.41 34.41 1.00 34.36 0.06 5.72

5.60

2 42.49 43.49 1.00 43.43 0.06 5.51

3 41.52 42.53 1.01 42.47 0.06 5.58

4 44.58 45.57 0.99 45.52 0.05 5.46

5 44.10 45.09 0.99 45.04 0.05 5.69

6 43.62 44.61 1.00 44.56 0.05 5.58

7 43.13 44.13 1.00 44.08 0.05 5.56

8 42.49 43.49 1.00 43.43 0.06 5.51

9 43.49 44.49 1.00 44.43 0.07 5.61

10 42.52 43.53 1.01 43.47 0.07 5.78

� 84

SampleCrucible

No.

Crucible

Weight (g)

Total Crucible

+ Sample (g)

Sample weight before

oven (g)

Total weight

Crucible + Sample

after oven (g)

Sample weight after

oven (g)

% moistur

e

AV

% moisture

Rice straw

1 41.72 42.72 1.00 42.65 0.07 7.60

7.76

2 40.30 41.29 1.00 41.22 0.08 7.85

3 45.14 46.15 1.00 46.07 0.08 7.83

4 42.34 43.34 1.00 43.26 0.08 8.05

5 43.25 44.25 1.00 44.17 0.08 7.97

6 44.17 45.17 1.00 45.09 0.08 7.89

7 45.08 46.08 1.00 46.00 0.08 7.81

8 45.85 46.86 1.00 46.78 0.08 7.61

9 46.97 47.97 1.00 47.90 0.08 7.50

10 48.08 49.09 1.00 49.01 0.08 7.52

� 85

1.3 Volatile Matter

SampleCrucible

No.

Crucible

Weight (g)

Total Crucible

+ Sample (g)

Sample weight before

oven (g)

Total weight

Crucible + Sample

after oven

(g)

Sample weight after

oven (g)

% VMAV

%VM

Wood

1 40.29 41.31 1.01 40.47 0.84 74.90

74.82

2 41.52 42.53 1.01 41.69 0.84 75.50

3 45.15 46.15 1.00 45.33 0.82 75.85

4 32.61 33.64 1.03 32.78 0.86 73.52

5 35.04 36.07 1.02 35.21 0.86 73.99

6 37.47 38.49 1.02 37.64 0.85 74.47

7 40.29 41.31 1.01 40.47 0.84 74.90

8 43.12 44.13 1.01 43.31 0.83 75.33

9 45.95 46.95 1.01 46.14 0.81 74.57

10 48.77 49.78 1.00 48.97 0.80 75.20

� 86

SampleCrucible

No.

Crucible

Weight (g)

Total Crucible

+ Sample (g)

Sample weight before

oven (g)

Total weight

Crucible + Sample

after oven (g)

Sample weight after

oven (g)

% VMAV

%VM

Bamboo

1 35.80 36.81 1.00 36.00 0.81 74.52

74.68

2 42.50 43.50 1.00 42.69 0.81 75.24

3 37.34 38.34 1.00 37.54 0.80 74.27

4 40.08 41.08 1.00 40.28 0.80 73.43

5 40.85 41.85 1.00 41.05 0.80 74.70

6 43.60 44.60 1.01 43.78 0.82 74.87

7 42.39 43.39 1.00 42.58 0.82 75.46

8 41.18 42.18 1.00 41.37 0.81 75.05

9 39.97 40.97 1.00 40.17 0.81 74.65

10 40.08 41.08 1.00 40.28 0.80 74.63

� 87

SampleCrucible

No.

Crucible

Weight (g)

Total Crucible

+ Sample (g)

Sample weight before

oven (g)

Total weight

Crucible + Sample

after oven (g)

Sample weight after

oven (g)

% VMAV

%VM

Rice husk

1 42.30 43.31 1.01 42.68 0.63 56.54

56.41

2 37.13 38.15 1.01 37.53 0.62 55.31

3 42.30 43.31 1.01 42.68 0.63 56.24

4 53.29 54.30 1.01 53.60 0.60 53.04

5 52.63 53.64 1.01 52.99 0.65 58.00

6 31.97 32.98 1.02 32.38 0.61 54.08

7 37.13 38.15 1.01 37.53 0.62 55.31

8 47.47 48.48 1.01 47.84 0.64 57.07

9 54.35 55.37 1.01 54.71 0.66 59.28

10 52.10 53.11 1.01 52.44 0.58 59.26

� 88

SampleCrucible

No.

Crucible

Weight (g)

Total Crucible

+ Sample (g)

Sample weight before

oven (g)

Total weight

Crucible + Sample

after oven (g)

Sample weight after

oven (g)

% VMAV

%VM

Rice straw

1 41.69 42.40 0.71 41.88 0.51 64.48

65.58

2 33.41 33.83 0.42 33.52 0.31 66.69

3 25.14 25.26 0.12 25.15 0.10 68.90

4 74.79 76.69 1.90 75.35 1.33 58.64

5 22.04 21.73 0.01 21.36 0.00 68.97

6 30.32 30.30 0.31 29.73 0.21 68.76

7 35.41 35.83 0.45 35.52 0.35 68.70

8 57.24 57.54 1.27 55.62 0.82 58.94

9 49.96 50.97 1.01 50.25 0.72 65.27

10 42.69 44.40 0.74 44.88 0.61 66.48

� 89

1.4 Ash

SampleCrucible

No.

Crucible

Weight (g)

Total Crucible

+ Sample (g)

Sample weight before

oven (g)

Total weight

Crucible + Sample

after oven (g)

Sample weight after

oven (g)

% ash AV

%ash

Wood

1.00 32.79 33.80 1.00 32.86 0.94 6.13

6.36

2.00 35.80 36.80 1.00 35.87 0.94 6.20

3.00 37.33 38.33 1.00 37.40 0.93 6.75

4.00 45.37 46.37 1.00 45.44 0.93 7.28

5.00 30.77 31.77 1.00 30.83 0.94 5.74

6.00 28.50 29.51 1.00 28.56 0.95 5.43

7.00 26.24 27.24 1.00 26.29 0.95 5.12

8.00 23.97 24.97 1.00 24.02 0.95 4.81

9.00 50.24 51.24 1.00 50.32 0.92 7.79

10.00 58.67 59.67 1.00 58.76 0.91 8.72

� 90

SampleCrucible

No.

Crucible

Weight (g)

Total Crucible

+ Sample (g)

Sample weight before

oven (g)

Total weight

Crucible + Sample

after oven (g)

Sample weight after

oven (g)

% ash AV

%ash

Bamboo

1.00 42.31 43.31 1.00 42.36 0.96 4.62

5.55

2.00 32.31 33.31 1.00 32.37 0.94 6.08

3.00 37.13 38.13 1.00 37.19 0.94 5.94

4.00 41.95 42.95 1.00 42.01 0.94 5.80

5.00 45.25 46.53 1.00 47.30 0.96 4.09

6.00 23.05 24.81 1.00 25.30 0.80 6.42

7.00 35.15 36.53 1.00 36.30 0.88 6.14

8.00 47.25 48.26 1.00 47.30 0.96 4.09

9.00 27.01 28.01 1.00 27.08 0.92 6.59

10.00 28.33 29.07 1.00 27.68 0.96 5.76

� 91

SampleCrucible

No.

Crucible

Weight (g)

Total Crucible

+ Sample (g)

Sample weight before

oven (g)

Total weight

Crucible + Sample weight

after oven (g)

Sample weight after

oven (g)

% ash AV

%ash

Rice husk

1.00 33.41 34.41 1.00 33.55 0.87 13.66

13.45

2.00 42.49 43.49 1.00 42.61 0.88 12.39

3.00 41.51 42.52 1.00 41.66 0.86 14.29

4.00 40.54 41.55 1.01 40.70 0.84 15.19

5.00 42.16 43.17 1.00 42.29 0.87 13.02

6.00 54.70 55.70 1.00 54.80 0.90 11.49

7.00 30.28 31.28 1.00 30.42 0.86 14.29

8.00 53.40 54.40 1.00 53.53 0.87 13.32

9.00 42.16 43.17 1.00 42.29 0.87 13.42

10.00 30.92 31.93 1.00 31.05 0.87 13.43

� 92

SampleCrucible

No.

Crucible

Weight (g)

Total Crucible

+ Sample (g)

Sample weight before

oven (g)

Total weight

Crucible + Sample weight

after oven (g)

Sample weight after

oven (g)

% ash AV

%ash

Rice straw

1.00 41.72 42.72 1.00 41.84 0.88 11.92

12.44

2.00 40.29 41.29 1.00 40.41 0.88 12.45

3.00 45.15 46.15 1.00 45.28 0.87 12.96

4.00 48.00 49.01 1.01 48.14 0.87 12.47

5.00 30.86 31.85 1.19 30.96 0.89 12.41

6.00 35.57 36.57 1.10 35.69 0.88 12.43

7.00 40.29 41.29 1.00 40.41 0.88 12.25

8.00 45.15 46.15 1.00 45.28 0.87 12.96

9.00 49.91 50.91 0.94 50.05 0.87 12.16

10.00 44.67 45.68 1.00 49.82 0.86 12.36

� 93

� 94

1.6 Bulk density

Sample No. D(g) D + 1.67

(g) S (g)

S + 0.04 (g)

V cm3 B(g/cm3)

Wood

1 0.45 2.12 0.78 0.82 1.30 1.63

2 0.62 2.29 0.90 0.94 1.35 1.70

3 0.60 2.27 1.15 1.19 1.08 2.10

4 0.93 2.60 1.31 1.35 1.25 2.08

5 0.95 2.62 1.29 1.43 1.29 2.03

6 0.45 2.12 0.78 0.85 1.10 1.83

7 0.62 2.29 1.60 0.94 1.30 1.85

8 0.79 2.46 1.02 1.18 1.35 1.87

9 0.96 2.51 1.14 1.18 1.42 2.10

10 0.70 2.50 0.93 1.38 1.10 1.90

AV 0.71 2.38 1.09 1.13 1.25 1.91

� 95

Sample No. D(g) D + 1.67

(g) S (g)

S + 0.04 (g)

V cm3 B(g/cm3)

Bamboo

1 0.58 2.25 0.97 1.01 1.24 1.81

2 0.67 2.34 0.94 0.98 1.36 1.72

3 0.57 2.24 0.90 0.94 1.30 1.72

4 0.56 2.23 0.85 0.89 1.34 1.66

5 0.60 2.27 0.88 0.92 1.35 1.68

6 0.64 2.31 0.91 0.95 1.36 1.70

7 0.68 2.35 0.94 0.98 1.37 1.74

8 0.56 2.20 0.87 0.95 1.25 1.64

9 0.52 2.46 0.92 0.94 1.28 1.72

10 0.59 2.02 0.89 0.90 1.30 1.76

AV 0.60 2.27 0.91 0.95 1.32 1.72

� Note: initial wire weight = 1.67 g

Wire weight in water = 0.04 g

V = sample volume (cm3)

D = Initial mass (g)

S = Mass in water (g)

B = bulk density (g/cm3)

� 96

� 97

� 98

� 99

2.1 Rice husk

No. C H N S O

1 34.43 4.01 0.24 0.11 61.21

2 33.42 3.00 0.23 0.12 63.23

3 36.12 3.49 0.18 0.12 60.00

4 35.21 3.39 0.21 0.15 61.02

5 36.22 4.00 0.19 0.13 59.24

6 34.51 3.82 0.18 0.13 61.33

7 34.45 4.13 0.24 0.12 61.00

8 35.27 3.82 0.23 0.13 60.55

9 36.81 3.69 0.22 0.12 59.13

10 35.02 3.71 0.20 0.10 60.89

AV 35.15% 3.71% 0.21% 0.12% 60.44%

� 100

2.2 Bamboo

No. C H N S O

1 45.65 4.53 0.26 0.06 48.01

2 42.10 4.21 0.23 0.05 47.23

3 46.95 3.49 0.24 0.04 49.12

4 44.92 4.56 0.21 0.06 50.12

5 45.74 4.00 0.23 0.04 49.24

6 44.88 4.67 0.28 0.07 49.87

7 44.25 4.13 0.24 0.09 47.21

8 46.53 4.20 0.23 0.07 48.21

9 47.42 4.62 0.24 0.06 47.13

10 48.20 4.75 0.20 0.10 47.26

AV 45.66% 4.32% 0.24% 0.06% 48.33%

� 101

2.3 Wood

No. C H N S O

1 45.65 5.53 0.17 0.06 48.01

2 43.10 5.44 0.18 0.05 51.23

3 46.95 3.46 0.21 0.04 49.82

4 44.92 6.21 0.19 0.06 48.56

5 45.21 5.12 0.17 0.04 49.44

6 44.88 4.63 0.18 0.07 49.87

7 45.28 5.24 0.18 0.09 48.21

8 44.22 4.23 0.21 0.07 50.83

9 42.26 5.26 0.19 0.08 51.93

10 46.52 4.32 0.20 0.10 48.32

AV 44.93% 4.94% 0.19% 0.07% 49.62%

� 102

2.4 Rice straw

No. C H N S O

1 41.50 5.29 0.61 0.23 52.16

2 38.14 5.44 0.57 0.20 55.15

3 40.25 4.86 0.63 0.25 53.21

4 39.12 5.67 0.62 0.23 54.22

5 40.03 5.42 0.59 0.22 53.42

6 41.32 4.86 0.58 0.20 52.81

7 41.23 5.24 0.57 0.24 52.43

8 37.05 4.84 0.59 0.26 56.83

9 38.84 5.26 0.61 0.21 54.60

10 41.23 4.32 0.57 0.20 53.46

AV 39.88% 5.12% 0.59% 0.22% 53.83%

� 103

3. Ash analysis

LAB NO.

Sample Name

Sample Condition

Sample Date

Receive Date

Analysed Date

50 x 0384

Bamboo

normal

-

6/8/2007

10/8/04-3/9/07

50 x 0385

Rice straw

normal

-

6/8/2007

10/8/04-3/9/07

50 x 0386

Rice husk

normal

-

6/8/2007

10/8/04-3/9/07

50 x 0387

Wood

normal

-

6/8/2007

10/8/04-3/9/07

1. ASH COMPOSITION (%) RESULT

Fe2O3

Al 2O3

MgO

SiO2

CaO

K2O

Na2O

TiO2

Mn3O4

SO3

3.68

4.79

5.92

44.08

23.09

12.69

0.44

0.28

0.10

1.61

0.76

2.42

1.87

72.73

5.40

12.87

0.24

0.01

0.78

0.28

1.20

0.14

0.64

88.72

3.92

2.58

0.25

0.07

0.09

0.00

3.24

5.57

5.85

43.24

23.43

12.21

1.73

0.29

0.37

2.39

2. ASH FUSION TEMPERATURE (oC)

2.1 Initial Deformation Temperature

2.2 Softening Temperature

2.3 Hemispherical Temperature

2.4 Fluid Temperature

1,142

1,152

1,163

1,178

1,000

1,194

1,220

1,268

1,440

1,500

>1,500

>1,500

1,138

1,183

1,189

1,205

� 104

� 105

� 106

� 107

3.1 ASH COMPOSITION (%)

3.1.1 Ash Composition–Bamboo

No. Fe2O3 Al 2O3 MgO SiO2 CaO K2O Na2O TiO2 Mn3O4 SO3

1 3.76 4.89 6.08 43.55 23.31 12.75 0.42 0.24 0.08 1.60

2 3.78 4.75 5.76 47.62 20.33 11.98 0.43 0.25 0.09 1.69

3 3.65 4.96 6.24 43.15 23.07 13.12 0.42 0.29 0.09 1.69

4 3.55 4.75 5.48 42.96 25.19 12.34 0.45 0.29 0.10 1.57

5 3.68 4.61 6.24 46.90 21.01 11.87 0.41 0.27 0.12 1.57

6 3.69 4.68 5.67 44.75 22.46 13.01 0.42 0.26 0.11 1.63

7 3.78 4.78 5.74 44.25 22.81 12.84 0.46 0.28 0.09 1.65

8 3.72 4.96 5.47 43.57 23.27 13.25 0.45 0.28 0.08 1.63

9 3.49 4.73 5.81 42.15 25.34 12.73 0.46 0.31 0.09 1.57

10 3.71 4.81 6.74 41.85 24.15 12.98 0.47 0.29 0.14 1.54

AV 3.68 4.79 5.92 44.08 23.09 12.69 0.44 0.28 0.10 1.61

� 108

3.1.2 Ash Composition–Rice straw

No. Fe2O3 Al 2O3 MgO SiO2 CaO K2O Na2O TiO2 Mn3O4 SO3

1 0.76 2.63 1.98 72.26 5.61 12.75 0.22 0.01 0.82 0.32

2 0.78 2.61 1.76 72.31 5.33 13.26 0.23 0.02 0.79 0.27

3 0.77 2.06 1.86 73.15 5.07 13.12 0.22 0.01 0.78 0.32

4 0.76 2.65 1.88 73.28 5.19 12.34 0.25 0.02 0.78 0.21

5 0.68 2.34 1.98 73.54 5.89 11.67 0.21 0.01 0.79 0.25

6 0.69 2.52 1.87 73.72 5.24 12.01 0.22 0.01 0.77 0.31

7 0.78 2.14 1.76 72.11 5.88 13.44 0.25 0.02 0.74 0.24

8 0.78 2.25 1.89 72.50 5.27 13.25 0.25 0.01 0.81 0.35

9 0.79 2.63 1.90 72.48 5.34 12.84 0.26 0.01 0.81 0.30

10 0.81 2.41 1.78 71.95 5.15 13.98 0.27 0.01 0.74 0.26

AV 0.76 2.42 1.87 72.73 5.40 12.87 0.24 0.01 0.78 0.28

� 109

3.1.3 Ash Composition – Rice husk

No. Fe2O3 Al 2O3 MgO SiO2 CaO K2O Na2O TiO2 Mn3O4 SO3

1 1.20 0.14 0.62 89.16 3.67 2.45 0.22 0.07 0.09 0.00

2 1.18 0.13 0.61 89.00 3.87 2.46 0.21 0.07 0.08 0.00

3 1.19 0.11 0.63 88.65 3.98 2.69 0.22 0.06 0.09 0.00

4 1.18 0.15 0.58 88.85 3.90 2.52 0.26 0.08 0.09 0.00

5 1.20 0.15 0.67 88.91 3.87 2.41 0.24 0.07 0.08 0.00

6 1.19 0.17 0.62 88.82 3.94 2.44 0.26 0.08 0.09 0.00

7 1.15 0.13 0.58 89.11 3.78 2.51 0.21 0.07 0.09 0.00

8 1.21 0.16 0.68 88.60 3.97 2.58 0.25 0.07 0.10 0.00

9 1.28 0.18 0.68 88.17 4.01 2.84 0.29 0.08 0.09 0.00

10 1.26 0.12 0.70 87.95 4.21 2.88 0.30 0.09 0.09 0.00

AV 1.20 0.14 0.64 88.72 3.92 2.58 0.25 0.07 0.09 0.00

� 110

3.1.4 Ash Composition - Wood

No. Fe2O3 Al 2O3 MgO SiO2 CaO K2O Na2O TiO2 Mn3O4 SO3

1 3.26 5.74 6.08 42.55 23.60 12.05 1.72 0.29 0.38 2.65

2 3.28 6.45 6.46 43.12 22.43 11.50 1.93 0.30 0.39 2.46

3 3.25 5.26 5.94 42.15 23.97 13.12 1.72 0.29 0.39 2.23

4 3.25 5.75 5.48 43.46 23.19 12.28 1.75 0.30 0.35 2.51

5 3.08 5.52 5.20 44.11 24.01 11.87 1.81 0.29 0.32 2.11

6 3.19 5.12 5.67 44.25 22.56 13.01 1.82 0.26 0.36 2.08

7 3.18 5.30 5.94 42.90 24.57 11.87 1.46 0.28 0.39 2.43

8 3.12 5.58 5.47 43.21 23.57 12.21 1.79 0.30 0.38 2.69

9 3.24 5.25 5.49 44.12 23.84 12.03 1.70 0.30 0.40 1.95

10 3.54 5.75 6.74 42.50 22.53 12.20 1.60 0.29 0.34 2.83

AV 3.24 5.57 5.85 43.24 23.43 12.21 1.73 0.29 0.37 2.39

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3.2 ASH FUSION TEMPERATURE (oC)

3.2.1 Bamboo

No. Initial Deformation

Temperature Softening

Temperature Hemispherical Temperature

Fluid Temperature

1 1,150 1,162 1,170 1,165

2 1,121 1,143 1,181 1,187

3 1,132 1,138 1,163 1,192

4 1,138 1,141 1,148 1,168

5 1,153 1,156 1,183 1,183

6 1,126 1,141 1,156 1,176

7 1,141 1,181 1,172 1,165

8 1,120 1,140 1,136 1,160

9 1,159 1,158 1,141 1,189

10 1,180 1,160 1,180 1,195

AV 1,142 1,152 1,163 1,178

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� 3.2.2 Rice straw

No. Initial Deformation

Temperature Softening

Temperature Hemispherical Temperature

Fluid Temperature

1 950 1,185 1,270 1,260

2 990 1,180 1,250 1,285

3 1,050 1,195 1,230 1,290

4 950 1,200 1,180 1,240

5 995 1,200 1,200 1,285

6 1,000 1,195 1,180 1,275

7 1,025 1,200 1,220 1,260

8 1,120 1,180 1,260 1,260

9 968 1,190 1,160 1,275

10 950 1,210 1,250 1,250

AV 1,000 1,194 1,220 1,268

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� 3.2.3 Rice husk

No. Initial Deformation

Temperature Softening

Temperature Hemispherical Temperature

Fluid Temperature

1 1,550 1,550 >1,500 >1,500

2 1,450 1,500 >1,500 >1,500

3 1,400 1,500 >1,500 >1,500

4 1,410 1,400 >1,500 >1,500

5 1,400 1,475 >1,500 >1,500

6 1,420 1,500 >1,500 >1,500

7 1,400 1,600 >1,500 >1,500

8 1,500 1,450 >1,500 >1,500

9 1,450 1,475 >1,500 >1,500

10 1,420 1,550 >1,500 >1,500

AV 1,440 1,500 >1,500 >1,500

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� 3.2.4 Wood

No. Initial Deformation

Temperature Softening

Temperature Hemispherical Temperature

Fluid Temperature

1 1,140 1,160 1,170 1,200

2 1,125 1,200 1,150 1,250

3 1,120 1,180 1,150 1,200

4 1,130 1,250 1,250 1,150

5 1,150 1,175 1,250 1,200

6 1,145 1,190 1,200 1,350

7 1,140 1,180 1,250 1,200

8 1,140 1,140 1,160 1,230

9 1,150 1,200 1,160 1,150

10 1,140 1,155 1,150 1,120

AV 1,138 1,183 1,189 1,205

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Appendix D

Questionnaires

� 116

Village Information

1. General information

1. Name of village...................................................................................................................

2. Number of populations………………….. Households (number).....................................

3. Tribal Type (if) …………..Males (number) …………Females (number)………………

An estimation of the population growth rate over the past decade (%)……………….

4 Number of population who can read / writing / speaking (%)

English………/…………/………/

5. Provide an estimate of the population growth rate over the past decade…………………

……………………………………………………………………………………………

6. Public Services in the village

1. Kindergartens /Childcare ı Yes ı No

2. Primary school ı Yes ı No

3. Public Phone ı Yes ı No

4. Spots Center/Village Recreation ı Yes ı No

5. Places of Worship ı Yes ı No

6. Other (please specify)………………………… ı Yes ı No

7. Public Utilities or Infrastructure in community

1. Hospital/health care center ı Yes patients (numbers)……………….......... ı No

2. School ı Yes: level of Education………… students (numbers).................... ı No

8. Transportation

1. Road from village to Town ı Yes (please specify).............................. ı No

2. How long does it take to town (one way)? .......................................... hour or minute.

3. Does it able to use the road for whole year? ı Yes ı No between……to...... (Month)

9. Enterprises/Store

1. Store ı Yes ı No (script 2.)

2. Appliances ı Yes ı No

3. If not (from 1) how far from the village to the closest store? .................km or how long

does it take to the store…………..…… hour or minute. By using……………………

10. No. of appliance’s repair store............... (Store/person)

11 .How many empty or public area for destroying used appliances proposes)...................Aere

12. Respective persons in the village

1. Village representative ı Yes ı No

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2. NGOs ı Yes ı No

3. Religion Leader ı Yes ı No

4. Others (please specify)...................................................................................

13. Top 3 of Respective persons in the community (Most – Least)

1. Please specify/ position..........................................

2. Please specify/ position..........................................

3. Please specify/ position..........................................

14. Communication with the government ı Yes (radio/telephone).......................... ı No

15. Does your village have economic household activities in your household?

ı Yes, specify………………….…….. ı No

16. Population career

1. Agriculture ................household (numbers) annual income……….………....... kyat

2. Merchant..................household (numbers) annual income…………...........kyat

3. Employee…............... household (numbers) daily wage.................................. kyat

4. Household industry household (numbers) annual income....................................kyat

5. Others (specify) ................... household (numbers)

5.1.............................

5.2.............................

5.3..............................

2. Main Income of the community

2.1 Source of Financial Aids

project Type (Lending, funding,

payment in kinds............)

Frequencies and Amount of

money

Frequencies Amount of money

Government

organization 1.

2.

3.

4.

5.

Private 1.

2.

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3.

4.

5.

International

organization 1.

2.

3.

4.

5.

2.2 Any possibility for the village to share the cost of grid electricity installation?

ı No

ı Yes amount............................................. kyat

From any sources? ......................................

3. Financial Plan for Borrowing of villager

Sources, Maximum loans and Pay-back period

Lending Source Maximum loans Per month payment Household debt

(kyat) (kyat)

Official lenders

commercial banks

others (specify)

Unofficial lenders

Siblings

Neighbor

Other (specify)……………

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Household Information

(One for each house)

1. Household General Details

1. Name of villager..........................................................................................................

2. Number of members in your household......................................................................

3. Number of Workers in your household.......................................................................

4. Interviewer’s gender ı Male ı Female

5. Occupation

ı 5.1 Farmer

ı 5.2 Fisherman

ı 5.3 Other (please specify)…………………………………………………...

6. Workdays/week……………………………………………………………….……

7. Typical time of day worker: From …………………..….….To………………..….

8. Household income…………………..Kyat (per week / month/year)

9. Average Amount of Household Savings……………..Kyat (per week / month/year)

10. Household Expenditure……………………………..Kyat (per week / month /year)

ı Food

ı Water

ı Household

ı Schooling

ı Medicine

ı Other (Provide details)

11. Enterprises

11.1 Economic activity……………………………………………………..…

11.2 Revenue ………………………….…………….………… (Kyat/month)

11.3 Operation Cost…………………………………………… (Kyat/month)

11.4 Location of Markets……………………………….…………………….

11.5 Is there potential for expansion? ı Yes ı No

Details: ……………………………………………….…………………..

…………………………………………………………………………………

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11.6 What kinds of facility that you need for business expansion (please specify and

describe your reason)

a) ……………………………………………………………….…………………

b) ………………………………………………………………………………...

c)………………………………………………………………………………….

2. Present Energy Sources and Use

2.1 Diesel

1. Access to a diesel generator (Yes/ No) (If No go to next section: Gas)

2. Do you own the diesel generator (Yes/ No) (If No go to 4)

Diesel motor size ……………………………generator size……………………..

Make………………………………………………………………….…………….

3 .Cost……………………………………………….……. Purchased new / second-hand

Generator age……….……………. Expected Life…………….…………………

4. Amount of fuel used? (L/day)………………………………..………………..……….

Fuel Cost (kyat/L)………………………………………...………………………..

Number of breakdowns / year………………………..….………………………..

Average cost to repair (kyat/repair)…………………….………….………………

5. List of the details from every appliance in your home (or business) that are

powered by diesel generation (except appliances run from batteries)

Appliances Number Power

Consumption

(W)

Days/

week

used

Time of day used

From To From To

Total

(hours/

day)

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2.2 Gas

1. Do you used gas in the household Access to a diesel generator (Yes/ No) (If No go to next

section: Kerosene)

Gas Bottle Size

(kg)

No. of Gas Bottles Cost to Refill

(kyat)

How often refilled

(weeks)

2. Gas appliances used (included only those for household use)

Appliances Number Power

Consumption

(W)

Days/

week

used

Time of day used

From To From To

Total

(hours/

day)

2.3 Kerosene

1. Do you kerosene in your household? (Yes/ No) (If no go to next section: Candles)

Amount of Kerosene used……………………… (L/month) Cost………………….. (Kyat/L)

Appliances Number Description

2.4 Candles

1. Do you candle your household? (Yes/ No) (If no go to next section: Biomass)

Amount used………………………… (Candles/month) Cost………….………….. (Kyat/L)

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2.5 Biomass (e.g. wood/drift wood, rice husks, dung, coconut, charcoal, etc)

1. Do you burn biomass in your household? (Yes / No) (If no go to next section: Batteries)

Amount used…………………………… (Candles/month) Cost………………….. (Kyat/L)

Type Purpose Amount used

(kg/day)

Source Cost (kyat/kg)

2.6 Batteries

1. Do you use car batteries? (Yes / No) (If no go to next question: disposable batteries)

Battery size (Ah)…………………………..Number of batteries….…………….………

Cost…………………………... (Kyat/L) Life (Years)…………………………………….

Means of Charging………………………………………………………………………….

Cost of Charging (kyat/charge)…………….………………………………………………

How often charged (Days)………………………….………………………………………

2. Appliances used (included only those for household use)

Appliances Number Power

Consumption

(W)

Days/

week

used

Time of day used

From To From To

Total

(hours/

day)

2.7 Do you used disposable batteries (If, no go to next section)

Size Number/month Cost (Baht/Battery) Purpose

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3. Future Energy Use

Do you intend to purchase any appliances in the future if there is grid electricity?

Appliance Number Expected Cost

(kyat/Appliance)

Source of Funds

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Appendix E

Publication

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137�

�

CURRICULUM VITAE

Name Mr. Min Lwin Swe

Date of birth 31 March 1977

Education Background A.G.T.I. (Machine Tool & Design), 1998,

Government Technical Institute (Maubin), Myanmar.

B.E (Chemical), 2002, Mandalay Technology University,

Myanmar.

Working experiences 1998 to 1999

Generator Checker,

Loyal Tax Company, Shwe Pyi Thar,

Yangon, Myanmar.

1999 to 2003

Demonstrator,

Department of Chemical Engineering,

Government Technological College, Thanlin,

Yangon, Myanmar.

2003-Present

Assistant Lecturer, Biogas Project,

Department of Chemical Engineering,

Government Technological University, Kyauk Se,

Mandalay, Myanmar.

Email Address minlwinswe@gmail.com