Design Charrette New York State Energy Research and Development Authority 17 Columbia Circle Albany, NY 12203 1-866-NYSERDA Carlos Dachary, PE, LEED-AP Sustainable Performance Consulting September 10, 2008
The New York State Energy Research and Development Authority is a public benefit corporation established by the New York State Legislature in 1975. NYSERDA s mission is to address the State s energy and environmental challenges while improving the economy.
Three Es of NYSERDA Energy Environment Economy
NYSERDA s Mission: NYSERDA strives to encourage decisions involving energy that drive positive environmental and economic results.
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
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
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
Goal: Design an Energy Efficient Building 20% better than ASHRAE Whole Building Approach: Capital Incentives Technical Assistance
Whole Building Design Standard 90.1-2004 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
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
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
IESNA/ASHRAE 90.1-2004 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%
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
Sample Regulated Load Savings Current Design performs 30.5% better than ASHRAE 90.1-1999!
Sample Regulated & Unregulated Load Savings
Goal: Provide a Day lit Building achieving a Daylight Factor of 2% or better Advanced Solar Energy Daylighting Capital Incentives Technical Assistance
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
Base Design No Daylight in General Merchandise Aisles Lighting Power Density = 0.55 w/sf = Design Targets = 60 HFC & 58 VFC
Daylighting Design Goal
Weather Conditions Cloud Cover Data for Syracuse, NY 1962 to 2006 National Climatic Data Center 205 98 63 3 7 22 3 6 19 5 7 19 6 7 17 6 10 15 7 11 12 8 12 11 7 11 13 7 10 13 6 8 17 2 6 22 2 5 24 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
Alternative 1 4 x 4 Skylight Clear Sky Conditions Overcast Sky Conditions 06/21 9:00 am Noon 3:00 pm & 6:00 pm
Alternative 1 4 x 4 Skylight Clear Sky Conditions Overcast Sky Conditions 12/21 9:00 am Noon 3:00 pm
Alternative 2 4 x 8 Skylight Clear Sky Conditions Overcast Sky Conditions 6/21 9:00 am Noon 3:00 pm & 6:00 pm
Alternative 2 4 x 8 Skylight Clear Sky Conditions Overcast Sky Conditions 12/21 9:00 am Noon 3:00 pm
Advanced Solar Daylighting
Base Case Wedge Light Scoop 1000 1000 1000 00 F o o t c a n d l e s 192 148 116 100 100 90 63 47 272 206 332 250 272 246 205 187 133 157 129 117 67 48 85 84 61 60 74 53 34 37 36 32 28 29 20 218 22020 228 222 511 551 465 386 417 351 236 257 217 112 80 48 140 135 100 60 89 53 F o o t 425 456 430 Base Case 6/21 10am clear 311 331 295 238 256 251 Base Case 198 9/22 10am 198clear 143 149 145 c Base Case 12/21 10am clear 124 a 100106 102 106 88 n Base Case 76 6/21 10am d overcast 61 64 53 l Base Case 46 9/22 10am e overcast s Base Case 254 269 12/21 10am overcast 251 257 245 236 207 199 202 184 12 164 166 149 138 10 141 137 14010 118 1 2 3 4 5 6 7 8 9 245 236 254 269 113 00 102 100 102 106 207 86 199 202 84 91 83 90 72 71 184 736/21 10am clear 166 70 63 68 62 60 59 64 140 529/22 10am clear 45 49 113 102 106 44 43 37 84 91 83 90 36 12/21 3610am 39 clear 31 27 73 64 70 68 6/21 10am overcast 29 315 182 102 86 61 37 F o 197 o 183 162 156 t 120 114 119 c 116 95 a 89 78 n 70 63 59 d 45 48 l 42 41 34 e 27 29 s 25 21 18 6/21 10am clear 9/22 10am clear 1 2 3 4 5 6 7 8 9 12/21 10am clear 218 220 Wedge 6/21 10am 228 251 257 245 222 236 254 269 clear 207 199 202 Wedge 9/22 14110am 164 184 166 149 138 clear 137 140 118 100 Wedge 12/21 10am 102 clear 100 102 113 106 86 84 91 83 90 Wedge 6/21 10am 72overcast 71 73 70 63 68 62 60 59 64 Wedge 9/22 10am overcast 52 45 49 44 43 Wedge 12/21 37 10am overcast 36 36 39 31 27 29 10 6/21 10am overcast 9/22 10am overcast 12/21 10am overcast 1 2 3 4 5 6 7 8 9 Light S Light S Light S clear Light S overc Light S overc Light S overc
Goal: LEED Certification Green Building Assistance Green Building Charrette Technical Assistance
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.
Charrette Tools
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.
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
LEED Sustainable Sites Credit 7.1 Heat Island Effect: Non-Roof Option 2 50% Parking Spaces under cover
LEED Sustainable Sites Credit 7.2 Heat Island Effect: Roof Option 1: Reflective Roofing Materials Reflectance High Reflectance Roof
LEED Sustainable Sites Credit 7.2 Heat Island Effect: Roof Option 2: Vegetated Roof Option 3: Combinations of Options 1 and 2
LEED Sustainable Sites Credit 7.2 Heat Island Effect: Roof
LEED Sustainable Sites Credit 7.2 Heat Island Effect: Roof
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Questions? Thank you!