1. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 1 Alexis Versele - Dries Hubrechts KaHo Sint-Lieven – 18 jan. 2008 Retro-commissioning to improving building energy efficiency for social-profit organisation.

2. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 2 Outline Existing building Objectives Methodology Results Conclusions

3. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 3 Existing buildings Social-profit organisation: integration of young immigrants Urban environment district of Antwerp: Oud Borgerhout Brick buildings built around 1930: –surface 650m² split up over four floors

4. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 4 Existing buildings Functioning organisation –secretary rooms, –educational and –sports rooms –housekeeper Sports secretary Sports rooms General secretary Rooms to let Party room Youth club Youth parties Party loft Office Working room Staircase Section AA Sports secretary Section PP Kameleon + apartments Backyard building Housekeeper

5. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 5 Objectives Improve energy efficiency of buildings Cost effective –Social profit organisation –3 Step business plan Improve comfort if possible

6. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 6 Methodology – Cx team Listing of problems - Investigation staff and building users - recent energy bills  Analysis of building energy performance - watt-hour meter for appliances - EPB. - Dialux Professional for lighting  Recalculation of energy consumption - Natural Gas consumption for heating - The energy usage lighting and electric appliances  Measures to improve energy performance and comfort - EPB as benchmark - Return on investment.  Business plan - 3 Step plan - Grants

7. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 7 Problems Energy consumption –Financial Natural gas: 21-03-06 to 20-03-07: 9554 euro = 325 kWh/m²a Electricity: 21-03-06 to 20-03-07: 2447 euro = 35 kWh/m²a –Ecological and social impact –Comfort

8. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 8 Energy bills Natural Gas consumption

9. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 9 Analysis of building energy performance Project –Part of the buildings Back yard building Housekeeper Different heating- and ventilation zones Sports rooms Rooms to let Party room Youth club Youth parties Party loft Staircase Sports secretaryGeneral secretary Office Working room Office Staircase

10. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 10 Analysis of building energy performance U-values

11. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 11 Analysis of building energy performance Heating and cooling –Central heating Condensing gas heater Control system –thermostatic control valves –room thermostats –exterior sensor –Additional heating systems Electrical heating housekeeper Electrical heating in basement –Cooling Active cooling in basement Ventilator in roof storey

12. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 12 Analysis of building energy performance Domestic hot water –Sports secretary: Comb heater HR-Top 20 l –Youth parties: Boiler natural gas –Sports rooms: Electrical boiler 300 l –Rooms to let : Electrical boiler 10 l

13. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 13 Analysis of building energy performance Ventilation –Not controlled natural ventilation –Very important leak looses

14. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 14 Analysis of building energy performance Lighting –Artificial lighting Installed power and light stream Performance of systems Under illuminated rooms Easiness of usage –Natural lighting –Light reflexion on inner walls –Dialux Professional

15. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 15 Analyse huidige energieprestatie gebouwencomplex Other electric consumption –Distinction Leak looses Use consumption –Calculations Watt-hour meter Using time

16. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 16 Analysis of building energy performance EPB-results –E-level = 177  EPB = 100 –K-level = 153  EPB = 45 –Ventilation loses limited in proportion to transmission looses

17. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 17 Recalculation of energy consumption Natural Gas consumption Natural Gas consumption = 207.674 kWh/y

18. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 18 Recalculation of energy consumption Electric consumption for lighting and appliances Electric consumption = 21.432 kWh/y

19. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 19 Business plan Economic analysis –Investment –Yearly savings Philosophy company –No credit loans –Return investments > Return low-risk investment –Interest low risk investment inflation energy price –Social profit organisation } => Playback period

20. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 20 Cost-effective energy and saving measures Building –Isolation building envelope Vertical External walls –From the inside »cheaper »Most rooms short time heating »Thermal capacity in floors –XPS-platen, type ‘Wallmate’ »Thickness ifo U-max and grants ‘Eandis’ »Check inner condensation withe Glaser »Cost calculation Replace doors and windows Isolation some roofs Isolation floors above basements from underside

21. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 21 Cost-effective energy and saving measures –Create isolated compartments secretaries –Use of rooms not at the same time –Great transmission looses to exterior –Gas consumption secretaries 64 % of total gas consumption. –Attention for cold bridges with inside insulation. –Lowering ceilings Isolate entrance hall from back yard building –entrance hall outside protected volume Ventilation plan –More important after insulation »health »condensation –Integration during refurbishing

22. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 22 Cost-effective energy and saving measures HVAC –Extend central heating to housekeepers house –Eliminate active cooling in basement –Replace electric boiler: natural gas boiler Lighting and electric appliances –Lighting Replacement of light bulbs by fluorescent lamps Linear fluorescent lamps Software ‘Dialux Professional’ –Replacement of electric appliances refrigerators door A++-model Electrical boiler 300 l with gas boiler

23. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 23 Cost-effective energy and saving measures Small measures –Unplug seldom-used appliances –Use power strips to switch off appliances –Set Computers to Sleep and Hibernate –Radiator foil –Insulation of heating tubes and boilers –Maintenance of heating system –Draught excluder and draught brushes REUS : Rational Energy Use –energy-saving tips for users –Ongoing monitoring of energy use

24. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 24 Step plan Summary cost-benefits

25. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 25 Step plan Summary cost-benefits –Category 1: free measures

26. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 26 Step plan Summary cost-benefits –Category 2: Investments with payback  1 year

27. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 27 Step plan Summary cost-benefits –Category 3: Investments with payback > 1 year

28. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 28 Step plan Global financial consideration

29. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 29 Step plan Global financial consideration Yearly investment cost + energy cost Yearly energy cost without measures Finance term < 8 year -Own capital. -Grants ‘Eandis’  =>

30. KaHo Sint-Lieven - Retro-commissioning for social-profit organisation 30 Conclusion Retro Cx: –Important energy savings are possible Small measures first Rational energy use and ongoing Cx –Cost-effective step-by-step approach instead of credit loans After small measures large measures can be taken –Comfort improvement