Design Charrette. New York State Energy Research and Development Authority 17 Columbia Circle Albany, NY NYSERDA

Transcription

1 Design Charrette New York State Energy Research and Development Authority 17 Columbia Circle Albany, NY NYSERDA Carlos Dachary, PE, LEED-AP Sustainable Performance Consulting September 10, 2008

2 The New York State Energy Research and Development Authority is a public benefit corporation established by the New York State Legislature in NYSERDA s mission is to address the State s energy and environmental challenges while improving the economy.

3 Three Es of NYSERDA Energy Environment Economy

4 NYSERDA s Mission: NYSERDA strives to encourage decisions involving energy that drive positive environmental and economic results.

5 NYSERDA s New Construction Program Objective: Transform the way buildings are designed and built Services: Financial incentives to offset added costs associated with more energy-efficient equipment and systems Energy and Green Building Technical Assistance Commissioning LEED, Executive Order 111, NYS Green Building Tax Credit

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7 Charrette Participants A forum where every team member is encouraged to cross fertilize with all others in order to identify solutions to problems that may relate to, but are not typically addressed by any one team member s specialty. The objective is to have every member of the design team understand the issues that the other members need to address. Results in a more thorough and integrated solution

8 Design Charrette Essentials 1. Establish Project Goals Design an Energy Efficient Building Provide a Day lit Building LEED Certification 2. Define Project Goals Energy Efficiency = 20% better than ASHRAE Day lit = Achieve a 2% Daylight factor LEED = Gold 3. Establish Decision Making Parameters 20% better than ASHRAE = EEMS with an ROI of > 20% Day lit = Saves Energy & Comfortable Environment LEED = Pursue credits with multiple benefits

9 Goal: Design an Energy Efficient Building 20% better than ASHRAE Whole Building Approach: Capital Incentives Technical Assistance

10 Whole Building Design Standard Appendix G Energy Standard for Buildings Except Low-Rise Residential Buildings Regulated Systems: Building Envelope HVAC Lighting Service Water Heating Electric Power Distribution Electric Motors

11 What Determines Building Performance? Equipment efficiency ratings Building loads: Envelope materials, insulation Window efficiency and % of total area Internal loads: lighting, appliances Required ventilation: how much outdoor air must be used System layout: shorter pipe runs, shorter duct runs, fewer bends Control strategies: unoccupied modes, automatic lighting, free cooling

12 Strategies for Efficiency Reduce the loads first lighting selection, daylighting Choose high efficiency equipment Use energy saving technologies VSD, occupancy sensors Take advantage of free energy waste heat recovery, economizers, night precooling

13 IESNA/ASHRAE Appendix G Cost Breakdown by End Use PBP Lighting (space) 5% Plug Load Equipment 7% Space Heating 8% Savings 21% Space Cooling 10% Pumps & Aux. Equip. 9% Heat Rejection 0% Lighting (site) 0% Ventilation Fans 4% Domestic Hot Water 1%

14 Energy Efficiency Measure Alternatives Building Insulation Alternatives 12 CMU blocks in lieu of 8 CMU 1 Polystyrene and ½ gypsum wall board added to 8 CMU block wall 2 Polystyrene and ½ gypsum wall board added to 8 CMU block wall 3 Polystyrene and ½ gypsum wall board added to 8 CMU block wall Roof Insulation Alternatives 4 Polyisocyanurate roof insulation 5 Polyisocyanurate roof insulation 6 Polyisocyanurate roof insulation Daylighting Alternatives Skylight shading coefficient = 0.5, Visible Transmittance = 0.5 Skylight shading coefficient = 0.4, Visible Transmittance = 0.4 Skylight shading coefficient = 0.7, Visible Transmittance = 0.7 Low-e skylight glazing with spectrally selective coating, U = 0.29, SC = 0.44 Equipment Efficiency Alternatives Premium efficiency motors Premium efficiency RTUs Controls Upgrades CO2 sensors in Sales and Food Service air handlers Variable speed fans on RTUs 20 tons or larger Domestic Hot Water Alternatives Refrigeration condenser heat recovery Miscellaneous Alternatives Transpired solar collector outside air preheat system High albedo roof Refrigeration condenser heat recovery for space heating

15 Sample Regulated Load Savings Current Design performs 30.5% better than ASHRAE !

16 Sample Regulated & Unregulated Load Savings

17 Goal: Provide a Day lit Building achieving a Daylight Factor of 2% or better Advanced Solar Energy Daylighting Capital Incentives Technical Assistance

18 Daylighting: Desired Outcomes Make the store look bright, attractive and open Save energy and reduce peak demand Light merchandise so as to make it look appealing Mitigate any adverse affects on perishable products Use daylight to stimulate sales

19 Base Design No Daylight in General Merchandise Aisles Lighting Power Density = 0.55 w/sf = Design Targets = 60 HFC & 58 VFC

20 Daylighting Design Goal

21 Weather Conditions Cloud Cover Data for Syracuse, NY 1962 to 2006 National Climatic Data Center CL PC CD CL PC CD CL PC CD CL PC CD CL PC CD CL PC CD CL PC CD CL PC CD CL PC CD CL PC CD CL PC CD CL PC CD CL PC CD JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL Average Days CL-Clear PC-Partly Cloudy CD-Cloudy

22 Alternative 1 4 x 4 Skylight Clear Sky Conditions Overcast Sky Conditions 06/21 9:00 am Noon 3:00 pm & 6:00 pm

23 Alternative 1 4 x 4 Skylight Clear Sky Conditions Overcast Sky Conditions 12/21 9:00 am Noon 3:00 pm

24 Alternative 2 4 x 8 Skylight Clear Sky Conditions Overcast Sky Conditions 6/21 9:00 am Noon 3:00 pm & 6:00 pm

25 Alternative 2 4 x 8 Skylight Clear Sky Conditions Overcast Sky Conditions 12/21 9:00 am Noon 3:00 pm

26 Advanced Solar Daylighting

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29 Base Case Wedge Light Scoop F o o t c a n d l e s F o o t Base Case 6/21 10am clear Base Case 198 9/22 10am 198clear c Base Case 12/21 10am clear 124 a n Base Case 76 6/21 10am d overcast l Base Case 46 9/22 10am e overcast s Base Case /21 10am overcast /21 10am clear /22 10am clear / am 39 clear /21 10am overcast F o 197 o t c a n d l e s /21 10am clear 9/22 10am clear /21 10am clear Wedge 6/21 10am clear Wedge 9/ am clear Wedge 12/21 10am 102 clear Wedge 6/21 10am 72overcast Wedge 9/22 10am overcast Wedge 12/ am overcast /21 10am overcast 9/22 10am overcast 12/21 10am overcast Light S Light S Light S clear Light S overc Light S overc Light S overc

30 Goal: LEED Certification Green Building Assistance Green Building Charrette Technical Assistance

31 The integrated design process is the key to producing high performance green buildings within budget. Green Building Charrette Objectives: 1. Gain an understanding of the process required to realize high performance LEED goals. 2. Establish preliminary LEED performance goals. 3. Familiarize participants with the importance of this approach. 4. Identify design concepts and strategies. 5. Assign Champions. 6. Establish next steps.

32 Charrette Tools

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34 LEED Sustainable Sites Credit 7.1 Heat Island Effect: Non-Roof Intent: Reduce heat islands (thermal gradient differences between developed and undeveloped areas) to minimize on microclimate and human and wildlife habitat.

35 LEED Sustainable Sites Credit 7.1 Heat Island Effect: Non-Roof Option 1 Shade Cover at Least 50% of the Site Hardscape with These: High Reflectance Paving Open Grid Paving

36 LEED Sustainable Sites Credit 7.1 Heat Island Effect: Non-Roof Option 2 50% Parking Spaces under cover

37 LEED Sustainable Sites Credit 7.2 Heat Island Effect: Roof Option 1: Reflective Roofing Materials Reflectance High Reflectance Roof

38 LEED Sustainable Sites Credit 7.2 Heat Island Effect: Roof Option 2: Vegetated Roof Option 3: Combinations of Options 1 and 2

39 LEED Sustainable Sites Credit 7.2 Heat Island Effect: Roof

40 LEED Sustainable Sites Credit 7.2 Heat Island Effect: Roof

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42 Questions? Thank you!