Analysing the Saving Potentials and Defining the Targets

Analysing the Saving Potentials and Defining the Targets Contract No. EIE/04/211/S 07. 38673

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

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

Energy consumption, metering and monitoring Data collection and potential analysis are precondition for verification of baseline costs and definition of targets for improvement energy efficiency / saving of costs Main data categories: w w 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 Gmb. H

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

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 Gmb. H

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

Steps 1. Data collection a. Energy costs or energy consumption b. Reference values, e. g. floor space, number of persons c. Known weak spots 2. Calculation of efficiency indicators 3. Comparison with benchmark => Estimate of saving potentials Berliner Energieagentur Gmb. H

Indicators · Schools: Heating consumption Ø Example: k. Wh/m 2/a, k. Wh/student/a. Ø Attention: differences in area definition: gross or net area used · Office: Electricity consumption Ø Example: k. Wh/m 2, k. Wh/work place · Hospitals: Water Consumption Ø Liters/bed and day Berliner Energieagentur Gmb. H

Benchmarking Water consumption indicators, German public buildings 1993 (VDI 3807, Part 3) Type of utilisation m 3/m 2 main occup. area Guide value m 3/person and year Administration buildings 0, 54 0, 50 5, 8 Police station buildings 0, 46 0, 40 5 General sports buildings 2, 55 2, 60 Communal centres/dwellgs. 2, 43 2 Build. for cultural purposes 0, 44 0, 40 Prisons 3, 28 2, 80 Technical universities 0, 96 0, 60 Berliner Energieagentur Gmb. H

Benchmarking Water consumption indicators, German public buildings 1996 (VDI 3807, Part 3 and ages) Type of utilisation Hospitals, basic supply Size (beds) Average value (l/bed per day) Guide value 0 -250 342 206 Hospitals, controlled supply 251 -450 400 272 Hospitals, central supply 451 -650 447 347 Hospitals, maximum supply 651 -1000 421 181 Hospitals Over 1000 701 393 Schools 6 – 10 l/pupil Kindergartens 11 – 14 l/user Berliner Energieagentur Gmb. H

Benchmarking Municipal water use by sectors (example Berlin 1992 - 2003): Inhabitants (million) / year 3, 47 / 1992 3, 46 / 1996 3, 33 / 2000 3, 39 / 2003 Total consumption (million m 3) 270, 9 229 212, 6 214, 4 Domestic consumption (million m 3) 174, 5 161 152, 9 157, 2 138 126 127 Domestic consumption person and day (l/d pers. ) Berliner Energieagentur Gmb. H

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

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

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 Gmb. H

Typical energy saving potentials for different types of measures Berliner Energieagentur Gmb. H

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

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

Example 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 Berliner Energieagentur Gmb. H