REAL PERFORMANCE OF GREEN
BUILDINGS

                          Stephen Carpenter
                      Enermodal Engineeri...
Green on the Grand
  Office Building

       Winner of federal government C2000
        design competition in 1996
      ...
Airtight Well-Insulated Envelope


  Double stud wall with cellulose insulation
  50 to 75 mm EIFS exterior




Creating...
High-Performance Windows


  Triple-glazed with 2 low-e coatings and
   argon gas fill
  Insulating edge spacer and fibr...
Daylighting & Indirect Lighting



       Natural light
        supplemented by
        indirect lighting
       Lightin...
Radiant Heating and Cooling


      Radiant cooling
         – First in N. America
         – Better comfort, lower fan
 ...
Storm Water & Cooling Pond


  Chiller heat
   rejected to cooling
   pond
  Make-up water
   provided by rain
   water ...
Initial Energy Performance
                                          200
                                                 ...
Energy Performance after Chiller
             Replacement
                                      180                       ...
How do we compare?

                                 E nerg y Intens ity in ekWh/m2

    700


    600                    ...
Summary


  Actual monitored performance is 118
   kWm2, very close to original predicted of
   106 kWh/m2
  Energy use ...
Vaughan / York Region Station 7-9
LEED® Canada Gold




Creating energy and resource efficient buildings
Tale of Two Fire Stations


 Station 79 was intended to be duplicate of 78
 79 was greened up but floor plan unaltered

...
Site and Water Measures


  Stormwater drains overland to TRCA land
  White concrete
  Naturalized landscaping includin...
Energy & Atmosphere Measures


 Added
  argon and warm edge spacers
  Ventilation heat recovery
  Condensing gas furnac...
Monitored Energy Use

                     Energy Consumption - Est 4 Month Totals (February to May 2007)
                ...
Material Measures


  Recycled steel roof, white concrete (18% recycled)
  75% construction waste diversion
  51% FSC w...
Indoor Environmental Quality
Measures

  Larger and operable windows, skylight added to
   fitness room
  CO2 control of...
Cost of LEED




                                     Station #78       Station #79
  Overall Construction                ...
Project Summary


  LEED Gold achieved at a cost of ~4%
  Monitored performance is matching
   predicted values




Crea...
Sisters of St Joseph Residence




Creating energy and resource efficient buildings
Naturalized Landscaping


 Native landscaping
 Green roof terrace
 Grass-pave parking




Creating energy and resource ...
Water Efficiency


  Eliminated irrigation (Xeriscaping)
  Use low-flow fixtures and dual
   flush toilets
  Collect an...
Energy Features


  Ground source heat pump throughout
  Condensing boiler for back-up and
   domestic water heating
  ...
Energy Savings


  52% and $160,000/yr energy savings




Creating energy and resource efficient buildings
Actual Performance:
    August to mid-October

  Actual usage 12% less than predicted
  On-track to achieve over 50% ene...
Conclusions


  Green buildings can achieve expected
   savings
  Energy simulation coupled with
   subsequent monitorin...
- Thank You




Creating energy and resource efficient buildings
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GBF2007 - RealBuildingPerformance - S.Carpenter Enermodal

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GBF2007 - RealBuildingPerformance - S.Carpenter Enermodal

  1. 1. REAL PERFORMANCE OF GREEN BUILDINGS Stephen Carpenter Enermodal Engineering October 24, 2007
  2. 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. 3. Airtight Well-Insulated Envelope  Double stud wall with cellulose insulation  50 to 75 mm EIFS exterior Creating energy and resource efficient buildings
  4. 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. 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. 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. 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. 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. 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. 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. 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. 12. Vaughan / York Region Station 7-9 LEED® Canada Gold Creating energy and resource efficient buildings
  13. 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. 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. 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. 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. 17. Material Measures  Recycled steel roof, white concrete (18% recycled)  75% construction waste diversion  51% FSC wood Creating energy and resource efficient buildings
  18. 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. 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. 20. Project Summary  LEED Gold achieved at a cost of ~4%  Monitored performance is matching predicted values Creating energy and resource efficient buildings
  21. 21. Sisters of St Joseph Residence Creating energy and resource efficient buildings
  22. 22. Naturalized Landscaping  Native landscaping  Green roof terrace  Grass-pave parking Creating energy and resource efficient buildings
  23. 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. 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. 25. Energy Savings  52% and $160,000/yr energy savings Creating energy and resource efficient buildings
  26. 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. 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. 28. - Thank You Creating energy and resource efficient buildings

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