Boosting Energy Efficiency and Cost Savings in Public Sector Buildings

1. Analysing the Saving Potentials and Defining the Targets

2. Motivation for Energy Perforamnce Contracting – Public Sector • Climate Protection • Cost reduction • Equipment modernisation / Renovation • Pushing innovation / Beacon project • Development of the regional economy • ... ? Berliner Energieagentur GmbH

3. Data Collection Analysing the potential Building Selection Decision for contracting Target Setting Implementation Need for Investment Savings Potential and Target Setting - overview Berliner Energieagentur GmbH

4. Energy consumption, metering and monitoring Data collection and potential analysis are precondition forverification of baseline costs and definition of targets for improvement energy efficiency / saving of costs Main data categories: • Energy consumptions and costs for electricity, heat/fuels etc. • Water consumptions and costs (drinking water, sewage) • Using data (operating hours, numbers of pupils etc.) • Description of the sites/buildings (heated areas, main energy consumers, service meters, comfort standards,....) Berliner Energieagentur GmbH

5. Data Collection Analysing the potential Building Selection Decision for contracting Target Setting Implementation Need for Investment Berliner Energieagentur GmbH

6. Specifically interesting buildings for performance contracting: • Administrative /Office buildings • Schools, Kindergarten, Universities • Hospitals, Nursing homes • Cultural Centres, Libraries • Sports Facilities (esp. Swimming pools) Criteria for selection of buildings • Above average energy consumption + costs • Long term user concept (for next 10 years) • Clear ownership structure Berliner Energieagentur GmbH

7. Data Collection Analysing the potential Building Selection Decision for contracting Target Setting Implementation Need for Investment Berliner Energieagentur GmbH

8. Data collection Energy costs or energy consumption Reference values, e.g. floor space, number of persons Known weak spots Calculation of efficiency indicators Comparison with benchmark => Estimate of saving potentials Steps Berliner Energieagentur GmbH

9. Schools: Heating consumption Example:kWh/m2/a, kWh/student/a. Attention: differences in area definition: gross or net area used Office: Electricity consumption Example: kWh/m2, kWh/work place Hospitals: Water Consumption Liters/bed and day Indicators Berliner Energieagentur GmbH

10. Benchmarking Water consumption indicators, German public buildings 1993 (VDI 3807, Part 3) Berliner Energieagentur GmbH

11. Benchmarking Water consumption indicators, German public buildings 1996 (VDI 3807, Part 3 and ages) Berliner Energieagentur GmbH

12. Benchmarking Municipal water use by sectors (example Berlin 1992 - 2003): Berliner Energieagentur GmbH

13. Benchmarking Examples with energy indicators of public buildings in Austria and Switzerland: Berliner Energieagentur GmbH

14. Benchmarking Following table shows examples with energy indicators of public buildings in Germany (Standard VDI 3807): Berliner Energieagentur GmbH

15. Benchmarking Uncertainties of the method • Missing or not enough energy consumption data for estimation of real energy indicators (also if there are only lump-sum invoices for energy consumption) • Too short periods under consideration / measuring periods • Weather influence • Occupancy level • average values of the ascertained energy indicators are sometimes only insignificantly higher than the desired values to be aimed at during / after renovation (there can be extremely high differences even in buildings within the same category or from the same building period) • There are no (not enough...) standard energy efficiency indicators for the building category (country specific indicators) Berliner Energieagentur GmbH

16. Typical energy saving potentials for different types of measures Berliner Energieagentur GmbH

17. Data Collection Analysing the potential Building Selection Decision for contracting Implementation Target Setting Need for Investment Berliner Energieagentur GmbH

18. Reflecting system requirememts Energy saving guarantee: low…..high Public budget consolidation low…..high Contract duration short…..long Investment costs low…..high Investment structure modernisation…..redevelopment Energy-Controlling unimportant…..important Maintenance unimportant…..important User motivation unimportant…..important Observation of comfort levels unimportant…..important Documentation unimportant…..important Berliner Energieagentur GmbH

19. System requirements for Pool 10, TFH Technical College Berlin Buildings: 5 buildings of the Technical College Baseline Costs : 2 Mio.Euro, net (heat and electricity) Maximum contract duration: 10 years Energy Savings to be achieved: 30% (average all buildings) Level of budget consolidation: 6% of baseline costs Energy-Controlling yes Maintenance: for installed equipment Example Berliner Energieagentur GmbH