1. DSM : International Experience (Energy Efficient AC Equipment : Greece) A.K.Asthana Sr. Technical Expert German Technical Co-Operation (GTZ) Bureau of Energy Efficiency, Ministry of Power, GOI

2. 2 22 PPC Power Generation (85.7%) IPPs Small scale/alternative energy producers Inports/interconnectors HTSO PPC Networks PPC supply IndependentSuppliers(Energa,ATEL >> more) 100%marketopening since July 2007 PPC IN GREEK ELECTRICITY MARKET

3. 33 RESIDENTIALINDUSTRIAL COMMERCI AL AGRICULT URAL PUBLIC LIGHTIN G STATE SUPPLIES D.C. ELECTR OMOTIO N TOTAL VOLTAGE LOW17.957.2711.439.11311.617.0482.471.746813.813962.103 35.261.095 MEDIUM 6.028.8784.259.270409.699 1.121.221142.02811.961.096 HIGH 7.761.698 TOTAL17.957.27115.229.68915.876.3182.881.445813.8132.083.324142.02854.983.889 TOTAL SOLD ENERGY TO PPC’ s CUSTOMERS (MWh) (2007)

4. 44

5. 55

6. 66

7. 7 77 Indirect Load Management Time Of Use tARIFFS

8. CASE SITUATION

9. Current Status Island €/MWh Cost of energy supply Regulated tariff Lesbos224113 Samos195117 Syros254117 Chios151116 Rhodes239119 Electricity in these Islands are charged by PPC but regulated by Regulatory Authority for Energy Electricity generated by diesel generator The cost of regulated tariff is about 46% to 76% of the cost of PPC

10. Energy Consumption Profile LV Customer MV Customer HV Customer Electric Sector Own Use Energy consumption peaks during the summer, with air-conditioning loads of small consumers connected to LV network accounting for the majority of electricity consumed - Replace the energy inefficient AC units with more efficient version - Incorporation of direct load control into AC units To reduce peak load condition !!!!

11. Households have typically split AC system of 9000 BTU/h (0.75 TR) Typically of D-Class consuming energy @ 0.9 KW Cost = € 400 per AC A-Class units consume about 75% of the energy consumed by D-class Power Consumption = @ 0.6 KW Cost = € 800 per AC Existing ACs Energy Efficient ACs SeasonNo. days / season Hours per day operation Total hours Winter155 0 0 Spring48 5 240 Summer70 6 420 Peak Summer44 7 308 Autumn48 3 144 Total3651,112 Annual Energy Consumption : 1012 kwh (€ 660 kwh for EE Acs) Annual Saving : 352 kwh ( = € 40 / year @ regulated tariff of € 113 / Mwh

12. Business Case # 1 Reduce the amount of energy consumed in the islands by encouraging consumers by a replacement policy Payback Period : 10 years (too high) - Little incentive for households - Provision of subsidy could provide the motivation for replacement The energy cost saving is equivalent to almost € 80 per unit replaced.

13. Business Case # 2 Reduce the energy consumption by AC during peak periods -Introduction of Critical Peak Pricing (CPP) - Introduce Smart Meters Provision of a controller to automatically switch-off the air conditioning unit during CPP period - Cost of smart meters @ € 150 - Benefit to Supplier : Avoided cost of Peak Power - Benefit to Customer : Reduce energy cost associated with new pricing structure Supplier benefit would be at least € 22/customer/year to cover the up-front cost of smart metering Peak load reduction of 10% to 15% Maximum energy cost saving to Supplier = € 0.4 / customer Assuming 50 critical peak days per year, annual benefit to supplier is around € 22/year

14. 14 15/01/2009 14 PUBLIC POWER CORPORATION S.A. Direct Load Management Remote systems for customer’ s appliances load management

15. 15 Direct Load Management Meters including remote load control switch breakers

16. 16 Indirect Load Management In house Display KW DemandKW Demand Cost per hourCost per hour Green house emissionsGreen house emissions Graphical informationGraphical information Messaging from supplierMessaging from supplier Demand indicatorsDemand indicators Time and room temperatureTime and room temperature

17. 17 Smart metering progress in EUROPE SPAIN:Regulator Decision for Smart Meters rollout. 23 m€ research program France:Pilot for 300.000 Smart Meters ITALY: Pioneer. 31 m Smart Meters established SWEDEN: Legislation 850.000 Smart Meters from VATTENFALL and 300.000 from E.ON FINLAND: For benefits more than 350.000 Smart Meters GERMANY:RWE decision for 100.000 Smart Meters pilot Netherlands:Regulator. Decision for Smart Meters roll out UK:Government.9,75 m£ for pilot projects

18. Thanks ….