QUAD AFRICA ENERGY

Innovative Energy and Demand Control Technology

EDC System

The Quad Africa EDC PhilosophyElectric power has largely replaced oil as the most controversial

energy issue of the new millennium and is growing by more than 80 000 MW per year. (Twice the total South African demand)

Souring costs, high interest rates and environmental damage caused by large power plants have wreaked havoc on the once booming industry.

In most countries, electricity prices have risen faster than the general rate of inflation since the mid1990’s.

In this regard electricity generation has been mostly that of coal fired power plants. These are a major cause of air pollution, and are implicated in the predominant environmental issue of the time, namely acid rain and global warming.

Quad Africa accepted the challenge to become a leading innovative technology service provider to promote an ecologically sensitive approach to the usage of electricity.

QUAD AFRICA ENERGY

Innovative Energy and Demand Control Technology

EDC SystemDesigned by Quad Africa for the special energy needs and requirements of the South African retail and commercial sector.

EDC directly contributes to a cleaner environment

Reducing your monthly Electrical BillThere are numerous technical aspects which can contribute to reducing electrical costs.

Many of these concepts - for example Power factor correction Harmonics and transient energy management Load balancing etc.

can and will contribute to improved energy efficiency but the core of cost reduction is a simple concept …………

You have to reduce your energy usage and demand for electricity

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Reducing your monthly Electrical Bill

The market is flooded with:1. Monitoring Programs2. Staff behaviour and training programs3. “Cleaning-up” your power…….

…..programs and products, but not a single product restricts, in a fully automated manner, the user to operate within a clearly defined energy budget. This is what sets EDC apart from all other energy products.

How ?With the Quad Africa EDC system, business operators can now be in

control of the monthly electrical cost

For example – If your monthly electrical bill is R 50 000, the new +30% increase will result in a R 65 000 monthly bill.

The R 15 000 pm increase can only be reduced if you use and demand less electricity.

With the EDC system, the business operator can now choose, according to a practical scale, the monthly cost of the electrical usage and demand.

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The Practical of How? A Quad Africa consultant will survey your business operation by

1. Assessing the 24-month energy and demand profile

2. Identifying your essential and non-essential loads

3. Consider your trading cycles and periods

4. Determine the effect and impact of seasonality

The consultant will then present the EDC financial saving options in accordance to the available and realistic practical energy saving options.

An electrical energy budget is agreed upon which will meet the business requirements, trading and turn-over requirements -

but in order to save, certain well defined and agreed upon inconveniences will periodically occur (to save energy you must use less electricity !)

The EDC system is then installed and will control the electrical energy and demand usage as per the client’s preference . The client can monitor the EDC performance “real time” on an interactive website.

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 160

20000

40000

60000

80000

100000

120000

140000

160000

180000

200000

(Stb)kW-hr

kW-hr

May 2009

Jan 2008 Months

kW-hrPer month

Weighted Ave135 000 kW-hr

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 160

50

100

150

200

250

300

350

400

(Stb) kVA

kVA

Months May 2009

Jan 2008

Weighted Ave250 kVA

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16R 0

R 10,000

R 20,000

R 30,000

R 40,000

R 50,000

R 60,000

R 70,000

(Stb)Cost

Old Tariff

Jan 2008 Months May 2009

Cost with EDCR 47 500 pm

Cost withoutEDCR 67 500 pm

QUAD AFRICA ENERGY

1 2 3 4 5R 0

R 10,000

R 20,000

R 30,000

R 40,000

R 50,000

R 60,000

R 70,000

R 80,000

R 90,000

R 100,000

Old TariffNew TariffkVA CapEDC Fixed Cost

May 2009

Sept 2009

Monthly Electrical cost – no EDC2009/10 Tariff

Monthly Electrical cost – with EDC 2009/10 Tariff

Elec Tariff Increase

(Stb) – Cost Projection

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Monthly Electrical cost – no EDC2008/9 Tariff

How to reduce electrical usage and demand in a highly competitive business environment ?

Any retail environment operates on excess and redundancy electrical energy elements.

For example (Lighting and Airconditiong in Retail)Customers seldom complain if lighting levels (lux) drop by 15%. Few customers can feel the difference between 22°C and 24°C The energy input required to maintain 22°C in a 5000m² premises

will require 25% more electrical energy than at 24.5°C when the outside temperature is 30°C.

Maintaining 1000 lux over a trading floor of 5000m² will require 30% more energy than 800 lux – though the untrained naked eye will not notice the difference. A further waste factor is the related heat of the 1000 lux which will have to be off-set by the airconditioning.

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How to reduce electrical usage and demand in a highly competitive business environment ?

Any fast food franchise environment operates on excess and redundancy electrical energy elements.

For example (Heating and Refrigeration)Food preparation by means of energy intensive fryers with oil

mediums are programmed to ensure that the product is never under prepared (acceptable safety margins)

The question is – what happens to the excess heat generated by these safety margins ? The Quad Africa EDC reduces waste heat in a very innovative and energy efficient manner.

The same applies to refrigeration. Produce are often refrigerated to and maintained at safety margins far below what is really necessary.

The Quad Africa EDC applies energy conservation cycles or so-called “green cycles” in heating and cooling.

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What really happens? Consider the hot plate of a stove A 1.2 kW hot plate will boil 1 litre of water on the hot plate in a period of

approximately 5 minutes (Selector switch on high) If you switch the hot plate off for 5 seconds and then back to high during the period

of 5 minutes, you will see that the time it takes to boil did not change (Theoretically there may be an argument but in practise – not!)

After 4 minutes you will find that the hot plate is at maximum temperature. If you switch it off for 5 seconds – and then back on to high the temperature of the hot plate will not drop in measurable terms. This is simply because the hot plate stores heat which will not dissipate or disappear when the plate is switched off for 5 seconds.

For the sake of simplicity, we call this method of using stored heat (energy) a “green cycle” which means work is done during that time but no electrical energy is used.

The Quad Africa EDC system calculates how many green cycles can be applied without affecting the process or product. Every “green cycle” saves money and contributes to a clean environment.

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How does the EDC save electricity?Electrical costs are derived from two components:kVA (currently the national cost varies from R60 – R80 per kVA)kW-hr (currently the national cost varies from 22c to 45c per kW-hr)

By reducing your demand from 600 kVA to 400 kVA you will immediately save 200 x R 70 = R 14 000 per month.

By reducing your energy usage from 150 000 kW-hr to 100 000 kW-hr per month you will save 50 000 x R0.25 = R 12 500 per month

It must, however, be practically and realistically possible for your business operation to be able to accept the energy and demand reductions – which can only be determined after the survey and the resulting energy and demand profile.

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The client and the consultant will formulate and define an energy budget The client will be aware of the “inconveniences” which may occur in order to

adhere to the energy budget The “inconveniences” will have minimal impact on trading or income-

generating operations / activities The EDC will allocate a predetermined energy budget to each premises The energy budget is then allocated to 15 minute trading cycles. If the premises operate within the allocated budget, no inconveniences will

occur. (inconveniences = less airconditioning, less lighting, less staff facilities) If the premises exceeds the 15-minute energy budget, the premises will

enter a “green cycle” – i.e. less energy will be allocated to airconditioning, lighting, staff facilities and back-of-house operations

The “inconveniences” will be in order of priority (8 Levels defined by consultant and conceded to by the client)

How will my energy budget be determined?

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Green Cycles 24-Hr Electrical Energy Usage

22h00-09h00

15 min “Green Cycle”

45 min no EDC

19h00-21h45

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No Trading

Define “inconveniences” and how will it affect my business operations? The non-essential electrical loads will be classified in priority levels 1 to 8 Airconditioning will be level 8 – which means that it will be the first electrical

load to be switched off when the demand or energy usage is exceeding the cap or budget

Hot water cylinders will be level 7 At level 6 staff facilities like urns, kitchens etc. will be disconnected during

the “green cycle” Lighting levels in less critical areas will be reduced during “green cycles” Priority level 1 will be a percentage (+/- 30%) of the electrical energy

supplied to lighting in critical areas The EDC will always start by reducing electrical energy to level 8 and will

sequentially move to higher priority levels in accordance with the electrical budget requirements

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Installation ?

Programmable Controllerwith residual software

Sensing circuitry

Logic control circuitry

Non-essential circuits under EDC control

Quad Africa -EDC

Survey, energy profile, defined energy and demand budget (1 week)

Installation and commissioning (3 days) Web information to client

Real Time

GSM link to network

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CLIENT:-------------Date: ---- Time:-----kW-hr Budget: 100000kVA Cap: 250Usage: (kW-hr) 72663(Month to Date)

Budget Adherence 86 %Month to Date Cost R 21 022

EssentialCircuits Non-Essential

Circuits

Municipal/EskomSupply Meter

EDC

CLIENT:-------------Date: ---- Time:-----kW-hr Budget: 100000kVA Cap: 250Usage: (kW-hr) 72663(Month to Date)

Budget Adherence 86 %

Meter

EDC

Municipal/Eskom Supply

Premises Distribution Board

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EDCCONTROL CENTRE

CLIENTWEB LINK

GSM

Real Time information

What about failure and back-up service? It is recommended that the client enters into a full maintenance and monitor

service agreement The system will be linked to a 24/7 EDC monitor centre. Local service agents are linked to the call centre to provide 24/7 back-up

service and help A 48-month rental is available – which is renewable Should your store or trading parameters change, related software changes

can be done on-line. The client will have on-line access to the EDC website to monitor energy

efficiency The client will receive an annual energy savings verification certificate issued

by an accredited agent The system is linked to the Department of Minerals and Energy CDM (Clean

Development Mechanism) PROJECTS. (See DME website project Red Signal – CO2 reduction program.

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QUAD AFRICA ENERGY

EDC – an innovative

energy saving design by

Quad Africa

Energy and Demand Control