1.2 power plant module2 batch3

EDC POWER PLANT FACILITIES

EDC Geothermal Power Plant Projects

Leyte

Total = 1,199 MW

Ormoc /Kananga. Leyte

EDC Owned• 125 MW Upper Mahiao• 232.5 MW Malitbog• 180 MW Mahanagdong• 50.9 MW Optimization

NPC- Owned (with SSA)• 112.5 MW Tongonan I

Albay and Sorsogon

EDC-Owned• 110 MW Bacman I• 40 MW Bacman II

Valencia, Negros Oriental

EDC-Owned• 112.5 MW Palinpinon I• 80 MW Palinpinon II

Kidapawan, Cotabato

BOT• 52 MW Mindanao 1• 54 MW Mindanao 2

Bago City, Negros Occidental

EDC- Owned• 49.4 MW Northern Negros

ED

C P

LAN

TS

200 MW cap

100 MW cap

100 MW cap

100 MW100 MW

NEGROS

Cap (MW) 185

Demand (H) 184

Surplus 1

C360 MWC360 MW

C85 MWC85 MW LEYTE-SAMAR

Cap (MW) 561

Demand 160

Surplus 401

CEBU

Cap (MW) 151

Demand (H) 402

Deficit (251)

THE VISAYAS GRID (2008 PEAK)

PANAY

Cap (MW) 93

Demand (H) 122

Deficit (29)

BOHOL

Cap (MW) 6

Demand 42.3

Deficit (36.3)C90 MWC90 MW

C50 MWC50 MW

NNGPFNNGPF

SNGPFSNGPF

LGPFLGPF

440 MW SubmarineCable to Luzon

200 MW

The power plant has a combined gross capacity of 131.86 MW and designed to operate at base load conditions. It comprises four GCCUs (Geothermal Combined Cycle Unit) with 31.8 MW capacity each and one brine Ormat Energy Converter (OEC) binary unit with 4.6 MW capacity. Each GCCU consists of one 20.3 MW GE non-condensing steam turbine that exhausts to three OEC binary cycle turbines with a rated capacity of 3.8 MW each.

Brief Description

Upper Mahiao Geothermal Power Plant

UMPP STG Bottoming OECs Brine OEC

MW net 118.5 4 units 12 units 1 unit

Steam Pressure ksca 11 11Steam Flow Rate TPH 1019 254.75 1267 TPH BrineCapacity MW 20.6 MW x 1 2.5 MW x 2 3 MW x 2

TypeReaction, Noncondensing Axial Impulse Axial Impulse

Capacity MVA 28.07 MVA x 1 5.625 MVA x 1 6.875 MVA x 1Voltage kV 13.8 13.8 13.8Type GE Kato KatoNo. of cells 3 x 9 21Type Crossflow. Induced draftVacuum ksca 8.43 8.43CapacityType

Kananga, Leyte

Jun-96

Turbine

Generator

Air Cooled Condensers

Gas Extraction

Power Station

Facilities

UnitLocationContracted CapacityCommisioned Date

Technical Description

Upper Mahiao Geothermal Power Plant

Process Diagram - UMPP

Single Flash Binary Cycle

Brief Description

Malitbog Geothermal Power Plant

The power plant has a combined gross capacity of 232.5 MW and designed to operate at base load conditions. It consists of three 77.5 MW Fuji conventional steam turbines with direct contact condensers and uses high pressure steam (10 kg/cm2) for power generation.


Malitbog Geothermal Power Plant Malitbog Main Malitbog Bottoming

MW net 216 13.35July-96 December-97

Steam Pressure ksca 11.0 5.96Steam Flow Rate TPH 1585.29 109.08Capacity MW 77.5 MW x 3 14.56 MW x 1

TypeReaction, Double flow, Condensing

Impulse, Condensing

Capacity MVA 94.1 MVA x 3 20 MVA x 1Voltage kV 13.8 13.8TypeNo. of cells 3 x 8 3TypeVacuum mmHg abs 88.9 74.98Type Direct contact Surface typeCapacity 3x50% SJE 1 x 100% SJEType Three stage Two stage


Gas Extraction

Power Station

FacilitiesSynchonous, brushless, PMG exciter

Counterflow. Induced draftCooling Tower

Condenser

Kananga, Leyte

Turbine

Generator

Process Diagram - MBPP

Double Flash – Conventional with Bottoming Cycle

Brief Description

Mahanagdong A & B Geothermal Power Plant

These base load power plants have a combined gross capacity of 180 MW consisting of three 60 MW Toshiba conventional steam turbines with shell-and-tube type condensers and uses low pressure steam (5 kg/cm2) for power generation.

SITE A

SITE B


Mahanagdong A & B Geothermal Power Plant Mahanagdong Main Mahanagdong Topping

MW netvaries fr 164.77 to 152.88

6.225 MW x 2 + 6.25 MW x 1

July-97 September-97Steam Pressure ksca 5.9 10.96Steam Flow Rate TPH 1506.173 1227.6Capacity MW 60 MW x 3 3.175 MW x 2 x 3

TypeImpulse-reaction, Double flow, Condensing Impulse, Backpressure

Capacity MVA 77.7 MVA x 3 8.24 MVA x 3Voltage kV 13.8 13.8TypeNo. of cells 7 cells x 2, 8 cells x1

TypeCounterflow. Induced draft

Vacuum mmHg abs 65Type Shell and tube

Capacity 5 x 20% SJE, Hybrid Type Two stage SJE, hybrid

Ormoc City, Leyte

Turbine

Generator

Gas Extraction

Power Station

FacilitiesSynchonous, brushless, PMG exciter

Cooling Tower

Condenser

UnitLocation

Contracted CapacityCommisioned Date

Process Diagram - MGAPP

Double Flash – Conventional with Topping Cycle

Process Diagram - MGBPP

Single Flash – Conventional with Topping Cycle

Brief Description

Leyte Optimization Power Plants

The Leyte Optimization Power Plant consists of three topping cycle plants (Mahanagdong A & B and Tongonan 1) and one bottoming cycle plant (Malitbog). The topping plants consist of OEC non-condensing steam turbines that produce power while reducing the steam high pressure to the conditions required by the main plants. The bottoming plant consists of a GE conventional steam turbine and condensing cycle unit that uses low pressure steam from the “second flash” of Malitbog brine for power generation.

BOTTOMING PLANT

TOPPING PLANT


Leyte Optimization Power PlantsTongonan - I Topping

Mahanagdong Topping

Malitbog Bottoming

Kananga, Leyte Ormoc City, Leyte Kananga, Leyte

MW net 5.65 MW x 36.225 MW x 2 + 6.25 MW x 1 13.35

September-97 September-97 December-97Steam Pressure ksca 11.32 10.96 5.96Steam Flow Rate TPH 1008 1227.6 109.08Capacity MW 2.875 MW x 2 x 3 3.175 MW x 2 x 3 14.56 MW x 1

TypeImpulse, Backpressure

Impulse, Backpressure

Impulse, Condensing

Capacity MVA 7.7 MVA x 3 8.24 MVA x 3 20 MVA x 1Voltage kV 13.8 13.8 13.8TypeNo. of cells 3

TypeCounterflow, Induced draft

Vacuum mmHg abs 74.98Type Surface typeCapacity 1 x 100% SJEType Two stage

Synchonous, brushless

UnitLocation

Contracted CapacityCommisioned Date

Power Station

FacilitiesCooling Tower

Condenser

Turbine

Generator

Gas Extraction

Process Diagram – Leyte Optimization

TURBINE-GENERATOR

CONDENSER

COOLING TOWER

TURBINE-GENERATOR

CONDENSER

COOLING TOWER

ROCK MUFFLER

ROCK MUFFLER

BRINE LINE

BRINE LINE

STEAM LINE

BOTTOMING CYCLE AND MAIN PLANT CONFIGURATION

PRODUCTION WELL

2 PH. LINE

RE-INJECTION WELL

RE-INJECTION WELL

FLASH VESSEL

MAIN PLANT

BOTTOMING PLANT

SEPARATOR VESSEL

Process Diagram – Leyte Optimization

STEAM LINE

BRINE LINE

PRODUCTION WELL

2 PH. LINE

FLASH VESSEL

TURBINE-GENERATORROCK MUFFLER

TURBINE-GENERATOR

CONDENSER

COOLING TOWER

TOPPING PLANT

RE-INJECTION WELL

SEPARATOR VESSEL

BRINE LINE

SPCV

TOPPING CYCLE AND MAIN PLANT CONFIGURATION

MAIN PLANT

The Mindanao I and II Geothermal Plant, a plant with dual-flow, impulse reaction, condensing turbine, a wet cooling tower, and the latter being a double-flash and with a net generation of 47MW and 48.25MW, respectively. High pressure and low pressure steam are used. Both utilizes Mitsubishi turbine.

Brief Description

Mindanao Geothermal Power Plant


Mindanao Geothermal Power Plant M1GPP M2GPP

MW net 47 48.25March-97 June-99

Hectares 2 1.8Steam Pressure ksca 7.0 7.0/3.31Steam Flow Rate TPH 385 343/47.4Capacity MW 52.3 50.93

Single Pressure Dual Pressure

Capacity MVA 67.8 67.8Voltage kV 13.8 13.8TypeNo. of cells 5 5TypeVacuum mmHg abs 71.4 73.492Type

Capacity2x50% SJE, 1x100% LRVP

1x60%/1x40% SJE, 1x100% LRVP

Type

Kidapawan, North Cotabato

Impulse-Reaction, Double flow, Condensing

Turbine

Generator

Land Area

Gas ExtractionTwo stage steam jet ejector, 3rd stage

vacuum pump

Power Station Facilities

Synchonous, brushless, PMG exciter

Type

Counterflow. Induced draftCooling Tower

Spray type, direct contactCondenser


Brief Description

Northern Negros Geothermal Power Plant The power plant is located at the western flank of Canlaon Volcano in the island of Negros Occidental. It is a conventional geothermal power generating plant, which utilizes both the high pressure and low pressure geothermal steam for power generation. The plant has a Gross Capacity of 49.33 MW. It exports the generated power from the 138 KV switchyard , via the 138 KV cross-country Transmission Line and TransCo Bacolod Substation, and finally into the TransCo power system and PNOC-EDC customers.


Net Capacity : 43.77 MW (High Pressure Steam + Low Pressure Steam) High Pressure Steam Flow: 94.4 kg/s

Interface Pressure: 5.0 kg/cm2gNon-Condensable Gases: 4.0 % w/w

Brine Flow : 178 kg/s

Gross Capacity : 49.37 MW (High Pressure Steam + Low Pressure Steam)

Brine Supply

Brine Pressure: 5.3 kg/cm2gBrine Inlet Temperature: 160 deg. C

Guaranteed Net Plant Steam Rate (100% Load)1st – 2nd year = 2.133 kg/MW-s3rd – 5th year = 2.144 kg/MW-s

(Expected amount of flashed steam if above conditions are met: 13.88 kg/s)

Return Condensate: Flow=20 kg/s; pH=4.5-7.5

Northern Negros Geothermal Power Plant

Process Diagram - NNGP

25

• Palinpinon Geothermal Power plant I (Pal-I) located at Barrio Puhagan, Valencia, Negros Oriental is approximately twenty one (21) kms. south-west of Dumaguete city. The plant covers an area of 2.7 hectares at an elevation of 696 meters above sea level.

• Pal-I can generate a total of 112.5 MW from three (3) 37.5 MW turbine generator units. All equipment was supplied by Fuji Electric Co. as a full turnkey project. Commercial operation started in June, July and September, 1983 for units 1,2 and 3 respectively.

• Palinpinon Geothermal Power plant II (Pal II) is composed of three (3) modular plants, Nasuji, Okoy-5 and Sogongon. The modular plants were constructed in response to the increasing demand of the Cebu-Negros-Panay grid. The total capacity is 80 MW from four units. Commercial operation of Nasuji and Okoy-5 started in January 31,1994 and December 22, 1994 respectively. Sogongon units 1 and 2 started commercial operation in February 18, 1995 and April 5, 1995 respectively.


Palinpinon Geothermal Power Plant

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• The Tongonan Geothermal Power Plant (later renamed Leyte Geothermal Power Plant – I by NPC) started commercial operation in July, 1983. It has 3 turbine-generator units with a total installed capacity of 112.5 MW. Electricity produced is mainly supplied to the provinces of Leyte and Samar. The largest costumer is the Leyte Industrial Complex in Isabel.


Tongonan Geothermal Power Plant

27

• Bac-Man I Power Plant utilizes geothermal energy from wells drilled in the geothermal fields of Manito, Albay and the city of Sorsogon. The plant consists of two (2) 55 MW units installed on a single power station. Units 1 and 2 were synchronized to the Luzon Grid on September 10, 1993 and December 12, 1993, respectively.

• Bac-Man II is composed of two (2) Units (20 MW per unit) modular generating power plant designed to utilize geothermal steam supplied by EDC from wells drilled in Bacon-Manito Geothermal Field. The Cawayan Plant (Unit 3) and the Botong Plant (Unit 4) started operation in March 15, 1994 and April 27, 1998, respectively.


BacMan Geothermal Power Plant

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Performance MetricsSteam rate = Main+Auxiliary Steam

Plant Gross OutputAvailability factor = Period Hours – (SOH+FOH) * 100%

Period Hours

Reliability factor = 1 - FOH _

(Period Hours – (FOH+SOH))Capacity factor = Actual Generation ___ *

100%

(Gross Capacity * Period Hours)

SOH = Scheduled Outage Hours

FOH = Forced Outage Hours

VARIOUS ENERGY CONVERSION SYSTEMS: Temperatures in the range of 85 to 170°C are the values at which the binary system can be designed to operate through the selection of appropriate working fluid.

Summary of Energy conversion systems.

GEOFLUID TEMP. °C

ENERGY CONVERSION SYSTEM

WORKING FLUID

COOLING SYSTEM

100 Basic binary R134a Evaporative condenser

150 Advanced Binary Isobutane Air

200 Binary or Single Flash

Isobutane or steam

Air or water

Source: Impact of Enhanced Geothermal Systems (EGS) on the United States in the 21st Century

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EXAM III

• A 75MW geothermal power plant receives 600 TPH of steam at full load. For the past year, the plant has undergone 24-day PMS and incurred an outage of 10 hours for the first half and 4.5 hours for the second half of the year. Considering that the plant has delivered 550,000,000 kWh of energy, compute for the steam rate (kg/s / MW) at full load, reliability, and availability and capacity factors. Assume that there are 365 days in a year.

End of PresentationThank You!

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