Internal Contracting: the example of Stuttgart

Transcription

1 Internal Contracting: the example of Stuttgart Nino Schäfer City of Stuttgart Office for Environmental Protection, Department for Energy Management Gaisburgstraße 4, D Stuttgart Phone +49/711/ nino.schaefer@stuttgart.de Folie 1

2 Hamburg Berlin Frankfurt Stuttgart Munich Folie 2

3 Inhabitants: 580,000 area: Elevation: level 207 km² 207 to 549 m above sea Folie 3

4 Energy consumption of municipal buildings 1,413 buildings = 2.2 million m² heated ground floor 192,800 MWh/a power = 29 Mio. Euro/a 314,600 MWh/a heat = 21 Mio. Euro/a 1.8 million m³/a water = 8 Mio. Euro/a 58 Mio. Euro/a Savings since 1977: 6,900 GWh Savings since 1990: 24 % Share of renewable energies: 7.2 % (2011) Folie 4

5 Financial possibilities of energy saving measures classical financing within the annual budget - long term projects, i.e. reconstruction internal contracting - urgent projects - know-how available - co-financing - small projects external contracting - no money available in the municipality - no reconstruction - no know-how in the municipality Folie 5

6 To Check before starting external contacting How much time/money takes the tendering process? Is the contractor s investment a black box? How do you deal with changes in the user profile? How much time takes the supervision? Can the customer define quality standards? Does the customer pay once or annually, when the contractor adjusts energy contracts? Folie 6

7 Advantages of internal contracting quick response time no extra charges for risk no extra cost reduced necessity for quality control partial financing possible usable, if energy and investments depend on different budgets the municipality decides upon the investment in their facilities ===> Know-how remains in the municipality Folie 7

8 The principle of internal contracting Office for environmental protection Analysis of energy saving potential contract Building i.e. school, hospital Fund for energy saving projects Financing energy saving project Reduced energy costs Budget for energy costs Saved energy costs get to the fund => Refinancing the fund Folie 8

9 Examples for internal contracting new controls for heating, ventilation or lighting insulation of walls or top floors cover of pools heat recovery systems renewal of lighting street lighting thermostats investment in water saving combined heat and power plants Folie 9

10 Thermal insulation of top floors Perfect for tiled roofs with big surfaces technically simple do it yourself possible building physics: ok pay back time: 4.4 years cheap Folie 10

11 Cover of outdoor or indoor pools Folie 11

12 Combined heat and power plants kw electrical power kw thermal power % efficiency kwh electricity/a kwh heat/a kg CO 2 - savings/a cost savings/a investment Folie 12

13 Wood chips for heating integral concept using municipal material ca m³/a producing wood chips reducing costs for disposal CO 2 -reducing 1500 t CO 2 /a reducing energy costs 285,000 /a investment 2 million 2004 first firing in operation - now 4 pay back time: 7.1 years Folie 13

14 Photovoltaic plants Free-standing facility area: 105 m²; rating: 12.6 kw P Savings: 12,600 kwh/a; 8.7 t CO 2 /a; 6500 /a investment: 94,900; payback period: 14.5 a Integrated into roofing area: 200 m²; rating: 12 kw P savings: 8800 kwh/a; 5.5 t CO 2 /a; 4300 /a investment: 105,000; payback period: 24.8 a Folie 14

15 Investments Investitionen [Mio. /a] investment [mio. /a] [Mio. ] Investments 3,5 3, ,0 2,5 2,0 1,5 2,5 2,0 1,5 municipal Eigenbetriebe companies municipal Ämter offices budget bereitgestellte Mittel investments kumulierte Investitionen in total ,0 1, ,5 0, ,0 0 0, year Jahr contracts fund: 8.8 Mio. year pay-back time: 7.4 years Folie 15 0

16 Cost savings Einsparungen [Mio. /a] [Mio. ] Cost savings 2,0 15,0 1,8 1,6 1,4 1,2 1,0 Wasser water Strom electricity Wärme heat kumulierte Total savings Einsparungen bereitgestellte investment in Mittel total profit Gewinn 13,5 12,0 10,5 9,0 7,5 0,8 6,0 0,6 4,5 0,4 3,0 0,2 1,5 0,0 0, Jahr saved costs 14.2 Mio. Euro with a budget of 8.8 Mio. Euro financial benefits until 2011: 5,4 Mio. Euro Folie 16

17 Energiemengen energy [MWh/a] Wassermenge water [m³/a] Energy and water saved Wärme Heat Strom Power Water Wasser year Jahr Total savings since1995: MWh heat MWh electricity m³ water Folie 17

18 avoided CO2 Co 2 Einsparung -emissions [t CO2/a] CO 2 -Reduction Jahr year Avoided emissions since1995: t CO 2 Folie 18

19 Stuttgart Come and visit us. Folie 19