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Retro-commissioning to improving building energy efficiency for social-profit organisation.

Retro-commissioning to improving building energy efficiency for social-profit organisation. Alexis Versele - Dries Hubrechts KaHo Sint-Lieven – 18 jan. 2008. Outline. Existing building Objectives Methodology Results Conclusions. Existing buildings .

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Retro-commissioning to improving building energy efficiency for social-profit organisation.

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

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

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

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

  8. Energy bills • Natural Gas consumption 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 Party loft Rooms to let Party room Sports rooms Office Office Staircase Youth club Youth parties Office Staircase Office Working room Sports secretary General secretary Office KaHo Sint-Lieven - Retro-commissioning for social-profit organisation

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

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

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

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

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

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

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

  28. Step plan • Global financial consideration 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’  => 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 KaHo Sint-Lieven - Retro-commissioning for social-profit organisation

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