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GBF2007 - RealBuildingPerformance - S.Carpenter Enermodal
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GBF2007 - RealBuildingPerformance - S.Carpenter Enermodal Presentation Transcript

  • 1. REAL PERFORMANCE OF GREEN BUILDINGS Stephen Carpenter Enermodal Engineering October 24, 2007
  • 2. Green on the Grand Office Building  Winner of federal government C2000 design competition in 1996  Goal of 50% energy reduction and minimal environmental impact Creating energy and resource efficient buildings
  • 3. Airtight Well-Insulated Envelope  Double stud wall with cellulose insulation  50 to 75 mm EIFS exterior Creating energy and resource efficient buildings
  • 4. High-Performance Windows  Triple-glazed with 2 low-e coatings and argon gas fill  Insulating edge spacer and fibreglass frames  Spectrally-selective outer glazing Creating energy and resource efficient buildings
  • 5. Daylighting & Indirect Lighting  Natural light supplemented by indirect lighting  Lighting power of less than 10 W/m²  Occupancy and daylighting sensors throughout Creating energy and resource efficient buildings
  • 6. Radiant Heating and Cooling  Radiant cooling – First in N. America – Better comfort, lower fan energy and noise  Air is dehumidified in air handling unit – Displacement ventilation  New small scale gas- fired chiller for cooling Creating energy and resource efficient buildings
  • 7. Storm Water & Cooling Pond  Chiller heat rejected to cooling pond  Make-up water provided by rain water off roof Creating energy and resource efficient buildings
  • 8. Initial Energy Performance 200 Natural Gas Electricity 180 DHW (Gas) Space Heating (Gas) Lighting Plug Loads Annual Energy Consumption [ekWh/m²] 160 Space Cooling Cooling Tower 140 Distribution Pumps Ventilation Fans High energy use 120 due primarily to poor performing 100 gas chiller (avg. COP 0.51) 80 60 40 20 0 Monitored, 1999 Monitored, 1999 Predicted 2006 Utility Estimated Calib (Abs Chiller) (Elec Chiller Targets Baselin Est.) Mo Creating energy and resource efficient buildings
  • 9. Energy Performance after Chiller Replacement 180 Natural Gas Electricity DHW (Gas) Space Heating (Gas) 160 Lighting Plug Loads Space Cooling Cooling Tower Annual Energy Consumption [ekWh/m²] 140 Distribution Pumps Ventilation Fans 120 100 80 60 40 20 0 2003 Utility 2004 Utility 2005 Utility 2006 Utility Calibrated Baseline EE4 Model Creating energy and resource efficient buildings
  • 10. How do we compare? E nerg y Intens ity in ekWh/m2 700 600 E lectricity Natural G as 500 400 300 200 100 0 C anadian O ffice O ffice & 10,000 - O ffice & C ons tructed G reen on the G rand B uilding 49,999 s q. F t. 1990-1999 Creating energy and resource efficient buildings
  • 11. Summary  Actual monitored performance is 118 kWm2, very close to original predicted of 106 kWh/m2  Energy use is 70% lower than office buildings constructed at the same time  Energy efficiency measures could reduce usage to 78 kWh/m2 Creating energy and resource efficient buildings
  • 12. Vaughan / York Region Station 7-9 LEED® Canada Gold Creating energy and resource efficient buildings
  • 13. Tale of Two Fire Stations  Station 79 was intended to be duplicate of 78  79 was greened up but floor plan unaltered Creating energy and resource efficient buildings
  • 14. Site and Water Measures  Stormwater drains overland to TRCA land  White concrete  Naturalized landscaping including wildflower ground cover  No irrigation system  56% water savings through waterless urinals and low flow fixtures Creating energy and resource efficient buildings
  • 15. Energy & Atmosphere Measures Added  argon and warm edge spacers  Ventilation heat recovery  Condensing gas furnaces  Direct/indirect lighting on occupancy sensors  Expected 30% savings over Station 78 Creating energy and resource efficient buildings
  • 16. Monitored Energy Use Energy Consumption - Est 4 Month Totals (February to May 2007) 1800 Natural Gas 1600 Electricity 1400 1200 ekWh/day 1000 800 600 400 200 0 78 Utility Bills 79 Utility Bills 79 Final Sim Creating energy and resource efficient buildings
  • 17. Material Measures  Recycled steel roof, white concrete (18% recycled)  75% construction waste diversion  51% FSC wood Creating energy and resource efficient buildings
  • 18. Indoor Environmental Quality Measures  Larger and operable windows, skylight added to fitness room  CO2 control of ventilation  Low-emitting wood Creating energy and resource efficient buildings
  • 19. Cost of LEED Station #78 Station #79 Overall Construction $3,334,000 $3,607,000 Cost (tendered 2004) (tendered 2005) Incremental Cost for 8.2% or LEED $20/ft2 Incremental Cost for 2.5 to 5.5% or LEED adjusted for $6 to $13/ft2 inflation Creating energy and resource efficient buildings
  • 20. Project Summary  LEED Gold achieved at a cost of ~4%  Monitored performance is matching predicted values Creating energy and resource efficient buildings
  • 21. Sisters of St Joseph Residence Creating energy and resource efficient buildings
  • 22. Naturalized Landscaping  Native landscaping  Green roof terrace  Grass-pave parking Creating energy and resource efficient buildings
  • 23. Water Efficiency  Eliminated irrigation (Xeriscaping)  Use low-flow fixtures and dual flush toilets  Collect and use rainwater for Waste water conveyance and irrigation hose bibs Creating energy and resource efficient buildings
  • 24. Energy Features  Ground source heat pump throughout  Condensing boiler for back-up and domestic water heating  In-suite HRVs for savings and better IAQ  All fluorescent lighting controlled by occupancy sensors Creating energy and resource efficient buildings
  • 25. Energy Savings  52% and $160,000/yr energy savings Creating energy and resource efficient buildings
  • 26. Actual Performance: August to mid-October  Actual usage 12% less than predicted  On-track to achieve over 50% energy savings 500000 400000 Energy (kWh) 300000 Electricity Gas 200000 100000 0 Code Simulated Actual Creating energy and resource efficient buildings
  • 27. Conclusions  Green buildings can achieve expected savings  Energy simulation coupled with subsequent monitoring and data analysis is key to ensuring savings Creating energy and resource efficient buildings
  • 28. - Thank You Creating energy and resource efficient buildings