1. ESCO Implementations in Austria and Germany – Some Good Practices DDI Jan W. Bleyl, Graz Energy Agency Ltd, Austria phone: +43 316 811848-0; email: bleyl@grazer-ea.at internet: www.grazer-ea.at

2. Overview of Content Delivery/Supply Contracting 1.Public housing: 130 kW elt natural gas CHP Berlin, Germany 2.Military air field: 500 kW elt Biogas CHP Zeltweg, Austria Perfomance Contracting 3.Public school „Jägergrund“, Graz, Austria 4.500 public buildings in Austria: „Federal Real Estate Agency“ (BIG), Vienna, Austria

3. General project data: 21 residential buildings (402 units, 26,800 m 2 ) Energy demand: 4.000 MWh therm /a 650 MWh elt /a CHP-System for residential housing 1/2 Supply system: 130 kW elt CHP-unit, 1,3MW therm peak load boiler, local heat + electricity grid Source: Berlin Energy Agency 2002

4. Some technical data of CHP-unit installed capacity: 130 kW elt/ 227 kW therm type: reciprocating engine fuel: natural gas Results: thermal energy: about 50 % of total demand covered by CHP-unit electricity:about 80 % of total demand covered by CHP Primary Energy Saving: ca. 30% CHP-System for residential housing 2/2 Source: Berlin Energy Agency 2002

5. Biogas CHP Plant Zeltweg (Military Airfield) 1/3 Largest Military Air Facility in Austria Gras area : appr. 270 ha Results: Public-Private Partnership between Austrian military and private energy service company (ESCO/Contractor) Europeanwide tendering process Private investment: appr. 2,5 Mio € Saving of 1 Mio € for composting facility Contract duration: 10 years

6. Biogas CHP Plant Zeltweg 2/3 500 kW elt biogas fired CHP plant Electricity is fed into public grid (high feed in tarifs for renewable electricity – 13 €cent/kWh) Heat is fed into local heating net work of the air field Farming machines are provided by service company Mowing, stowing into silo, distribution of liquid manure is executed by military personal

7. Biogas CHP Plant Zeltweg – Schematic 3/3

8. Reconstruction of heating system and energetic optimisation Public School (Jägergrund/Webling) 1/2

9. Public School Jägergrund/Webling) 2/2 Measures  Conversion from electrical heating to central heating  Connection to district heating and installation of a substation  Controlling system and optimisation  Electric installations and light management  Changing windows, frames (incl. parapets and wall elements) Results: Private Investment: 1,17 Mio. Euro Guaranteed energy saving: 47% (40.000 Euro/a) CO 2 -reduction: 335t/year (-84%) Duration of contract: 15 years Contracting-Award Energieprofi 2000

10. Saving potentials in public buildings – results from the Austrian EPC-Campaign project startimplementation of measures end of contract years energy cost payment to ESCo controlling cost service & operationt project management (tendering,...) Source: EVA 2003

11. The team of the Graz Energy Agency Contact us: office@grazer-ea.at - www.grazer-ea.at