Rising To The Challenge: Toward Carbon Neutral Buildings

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Presentation given at the 2009 Eco El Paso Conference. Presentation includes building blocks for carbon neutral design and a few case studies. A good primer for the 2030 Challenge.

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  • I love you presentation, wonderful piece of work. I would like to keep in touch with you. As we are also providing Green Building Services in India.

    Leo Victor
    leovictor@marsvapours.com
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Rising To The Challenge: Toward Carbon Neutral Buildings

  1. 1. Rising to the Challenge of Carbon Neutrality Tom Hootman, AIA, LEED AP RNL, Director of Sustainability
  2. 2. 2030 ° Challenge?
  3. 3. Objective?
  4. 4. Objective?
  5. 5. Agenda <ul><li>1. About the 2030 Challenge </li></ul><ul><ul><li>Comparisons to LEED </li></ul></ul><ul><ul><li>Comparisons to EISA </li></ul></ul><ul><li>2. RNL’s approach </li></ul><ul><li>3. Methodology and tools </li></ul><ul><li>4. Methodology for net-zero buildings </li></ul><ul><li>5. Case Study – Fort Carson Brigade and Battalion Headquarters </li></ul><ul><li>6. Case Study – NREL Research Support Facilities </li></ul>
  6. 6. 2030 ° Challenge
  7. 7. Source: Metropolis Magazine October 2003
  8. 8. 2030 ° Challenge The 2030 Challenge is a call for phased reduction in the consumption of fossil fuels in buildings Developed by 2030 Architecture and Edward Mazria Supported by the AIA and USGBC Adopted by US Conference of Mayors
  9. 9. 2030 ° Challenge Make a firm-wide commitment Develop an implementation plan Get on board at: www.architecture2030.org Keep at it! ADOPTING
  10. 10. 2030 ° Challenge Existing and New buildings 50% NOW New Buildings 60% in 2010 70% in 2015 80% in 2020 90% in 2025 Carbon Neutral in 2030 TARGETS
  11. 11. 50% from what?!?
  12. 12. “ meet a fossil fuel, GHG-emitting, energy consumption performance standard of 50% of the regional (or country) average for that building type .” CBECS Commercial Buildings Energy Consumption Survey RECS Residential Energy Consumption Survey
  13. 13. 2003 CBECS <ul><li>ENERGY STAR TARGET FINDER </li></ul><ul><li>NREL Tables </li></ul><ul><ul><li>“ Methodology for Modeling Building Energy Performance across the Commercial Sector”, Table 4-1, pg 21 </li></ul></ul><ul><li>2030 Challenge Tables </li></ul><ul><li>CBECS </li></ul>
  14. 14. Energy Use Intensity EUI Annual Energy Use / Building Area kBtu / SF / Year
  15. 15. 64.3 kBtu/SF/yr Energy Use Intensity 45 MPG
  16. 16. 64.3 kBtu/SF/yr Site Energy Energy Use Intensity 170 kBtu/SF/yr Source Energy 2.65X
  17. 17. Site Energy Use Intensity
  18. 18. Site Energy Use Intensity
  19. 19. Site Energy Use Intensity 2030 ° Challenge Baselines El Paso, Texas Office K-12 Food Services ENERGY STAR* 98 56 N/A NREL (CBECS) 70 74 393 2030 Challenge N/A N/A 302 (534 Fast Food) * Varies based on input Values in kBtu/SF/year
  20. 21. ENERGY STAR Target Finder Zip Code
  21. 22. ENERGY STAR Target Finder Building Type
  22. 23. ENERGY STAR Target Finder 50% Percentile is Average Building
  23. 24. ENERGY STAR Target Finder View Results
  24. 26. ASHRAE 90.1 2004 = 30% ASHRAE 90.1 2007 = 25% IECC 2006 = 30% CA Title 24 2005 = 15-20% CA Title 24 2008 = 10% RESNET HERS = 65 or less 2030 ° Challenge Code Equivalency
  25. 27. 2030 energy goals benchmark other existing buildings based on average annual fossil fuel energy use. LEED energy goals are based on energy cost savings and benchmark your building as designed to meet ASHRAE 90.1. 2030 ° Challenge and LEED
  26. 28. 2030 ° Challenge and EISA 2007 60% in 2010 70% in 2015 80% in 2020 90% in 2025 Carbon Neutral in 2030 55% in 2010 65% in 2015 80% in 2020 90% in 2025 Carbon Neutral in 2030 2030 ° Challenge Energy Independence and Security Act
  27. 29. OK, Breath!
  28. 30. <ul><li>Communications </li></ul><ul><li>Process </li></ul><ul><li>Consultants </li></ul><ul><li>Operations </li></ul><ul><li>Education </li></ul><ul><li>Client Value </li></ul><ul><li>Marketing </li></ul><ul><li>Metrics and Verification </li></ul>2030  Challenge RNL Implementation Plan
  29. 31. Sustainable Design Coordinator
  30. 32. Sustainable Design Coordinator Training
  31. 33. 2030  Challenge RNL Methodology <ul><li>Implementing innovative sustainable design strategies – optimize energy performance </li></ul><ul><li>Generating on-site renewable power </li></ul><ul><li>Purchasing (20% maximum) green power </li></ul><ul><li>Measure as CO 2 </li></ul>
  32. 34. 2030  Challenge
  33. 35. 2030  Challenge
  34. 36. <ul><li>Set energy goals </li></ul><ul><li>Integrated design </li></ul><ul><li>Energy model! </li></ul><ul><li>Use passive strategies = free energy </li></ul>Optimizing Energy Performance
  35. 37. Optimizing Energy Performance
  36. 38. Optimizing Energy Performance Passive Strategies – El Paso
  37. 39. Optimizing Energy Performance Passive Strategies – El Paso
  38. 40. Optimizing Energy Performance Passive Strategies – El Paso
  39. 41. Optimizing Energy Performance Passive Strategies – El Paso
  40. 42. Optimizing Energy Performance Passive Strategies – El Paso
  41. 43. Optimizing Energy Performance Passive Strategies – El Paso
  42. 44. Optimizing Energy Performance Passive Strategies – El Paso
  43. 45. Green Power
  44. 46. Can purchase up to 100% of electrical use. LEED-NC + CS credit for 35%, 2 years LEED-CI credit for 50%, 2 years 2030 Challenge caps benefit at 20% Green Power
  45. 47. Green Power Renewable Electricity REC
  46. 48. Green Power Renewable Energy Certificate (REC) REC +
  47. 49. Renewable Energy
  48. 50. On-Site Renewable Energy
  49. 51. Renewable Energy Resources Source: Energy Information Administration
  50. 52. NREL-IMBY
  51. 53. NREL-IMBY
  52. 54. PV Planning Basics <ul><li>Orientation, tilt, solar access and shading </li></ul><ul><li>BIPV </li></ul><ul><li>PV sizing </li></ul><ul><ul><li>LEED, % of energy, ZEB </li></ul></ul><ul><ul><li>PV Watts website </li></ul></ul><ul><ul><li>NREL IMBY website </li></ul></ul><ul><ul><li>Roof area or site area </li></ul></ul><ul><li>PV costs </li></ul><ul><ul><li>Incentives and rebates </li></ul></ul><ul><ul><li>Dsireusa.org website </li></ul></ul><ul><ul><li>NREL IMBY website </li></ul></ul><ul><ul><li>Structure the cost and value </li></ul></ul><ul><ul><li>PPAs </li></ul></ul>
  53. 55. PV Watts
  54. 56. PV Watts
  55. 57. PV Watts
  56. 58. PV Watts El Paso 1 KW of PV generates 1657 kWh of electricity
  57. 59. Power Purchase Agreements Building Owner Solar Developer Utility Company <ul><li>Gets clean, renewable energy </li></ul><ul><li>Gets a competitive long term power contract </li></ul><ul><li>Provides roof or site area for PV </li></ul><ul><li>Gets 30% Federal tax credit </li></ul><ul><li>Gets Solar RECS from Utility </li></ul><ul><li>Gets 20 year contract for power </li></ul><ul><li>Installs and maintains equipment </li></ul><ul><li>Gets to claim renewable energy toward renewable portfolio standard </li></ul><ul><li>Provides net metering </li></ul>
  58. 60. Hanging in there?
  59. 61. Carbon Footprint
  60. 62. Carbon Footprint
  61. 63. Carbon Footprint Footprint = Annual Energy x Emission Factor CO 2 /yr = kBtu/yr x CO 2 /kBtu Or use CO 2e
  62. 64. Emission Factors
  63. 65. Emission Factors <ul><li>NREL “Source Energy and Emission Factors for Energy Use in Buildings” </li></ul><ul><li>ENERGY STAR Target Finder </li></ul><ul><li>eGRID and eGRIDweb </li></ul>
  64. 66. Emission Factors Emission factor for electricity in El Paso: 1.311 LB of CO 2 /kWh or 0.384 LB of CO 2 /kBtu Emission factor for natural gas: 133.60 LB of CO 2 /1000 ft 3 or 0.130 LB of CO 2 /kBtu
  65. 70. ZEB Definitions Net Zero Site Energy Building Net Zero Source Energy Building Net Zero Energy Cost Building Net Zero Energy Emissions Building Source: NREL
  66. 71. ZEB Classifications ZEB:A Renewable energy within footprint ZEB:B Renewable energy within site boundary ZEB:C Renewable energy off site ZEB:D Purchased green power Source: NREL
  67. 72. On to buildings!
  68. 73. Fort Carson Brigade and Battalion Headquarters
  69. 74. US Army Corp of Engineers: Client Hensel Phelps Construction: Contractor RNL: Architecture, Interiors, Landscape, Lighting Cobb Mechanical / AE Associates: Mechanical Sturgeon Electric / RMH Group: Electrical Team Puma / Martin/Martin: Structural AEC: LEED, Energy Modeling Fort Carson Design Build Team
  70. 75. Army’s First LEED Gold
  71. 76. LEED Metrics Open Space 152,024 SF Total Water Use Reduction 2,887,511 Gallons/Year Energy Cost Savings $109,830 / Year Construction Waste Diverted 408.1 Tons Recycled Content $1,933,391.05 245% 56.0% 30.8% 53.9% 32.8%
  72. 77. Daylighting and Form
  73. 78. RFP Conceptual Layout
  74. 79. LEVEL 1 LEVEL 2 LEVEL 3 Floor Plans 140,000 SF
  75. 80. RFP Conceptual Site Plan BBHQ North
  76. 81. Site Plan North
  77. 83. Passive Daylighting Shading to Reduce Heat Gain Orientation Envelope Wall Insulation Roof Insulation High Performance / Optimized Glazing High Albedo Roof Energy Efficiency Measures
  78. 84. Systems Lighting Power Density Reduction CO2 Sensors for Demand Control Ventilation Energy Recovery Condensing Boiler Air-cooled Variable Speed Chiller Variable Flow HW/CHW Pumps HW/CHW Temperature Reset on Outside Air Temperature Supply Air Temperature Reset on Outside Air Temperature Energy Efficiency Measures
  79. 85. Energy Dashboard Project Energy Goal = 30% better than ASHARE 90.1 Design Energy Savings = 34% better than ASHRAE 90.1 Energy Use Intensity: 2030 Baseline 131 kBtu/SF/year LEED Baseline 97 kBtu/SF/year Design 64 kBtu/SF/year
  80. 86. Carbon Dashboard Carbon Emissions: Percent Carbon Emission Reduction = 51% 2030 Baseline 65 LB CO 2e /SF/year Design 32 LB CO 2e /SF/year
  81. 87. Department of Energy National Renewable Energy Lab Research Support Facilities (RSF)
  82. 88. DOE / NREL: Client Haselden Construction: Contractor RNL: Architecture, Interiors, Landscape, Lighting Stantec: MEP, Energy Modeling KL&A: Structural Martin/Martin: Civil AEC: LEED, Daylight Modeling Namaste Solar: Solar Consultant NREL RSF Design Build Team
  83. 89. Project Objectives Safety LEED Platinum Energy Star 1. Mission Critical
  84. 90. 2. Highly Desirable 800 staff Capacity 25kBTU/sf/year Architectural integrity Honor future staff needs Measurable ASHRAE 90.1 Support culture and amenities Expandable building Ergonomics Flexible workspace Support future technologies “ How to” manual Real-time PR” campaign Secure collaboration with outsiders Building information modeling Substantial Completion by 2010 Project Objectives
  85. 91. 3. If Possible Net zero design approach Most energy efficient building in the world LEED Platinum Plus ASHRAE 90.1 + 50% Visual displays of current energy efficiency Support public tours National and global recognition and awards Support personnel turnover Project Objectives
  86. 92. Zero Energy Strategies
  87. 93. PV System Natural Ventilation Thermal Mass UFAD Labyrinth Transpired Collectors Radiant Cooling Radiant Heating Workplace Daylighting 60’ The Section
  88. 94. 1 2 3 4 Floor Plans 220,000 SF
  89. 95. RSF RSF Parking Site Plan
  90. 96. Massing
  91. 97. East and West Orientations
  92. 98. Zinc Pre-cast Concrete Transpired Collector Exterior Materials
  93. 99. Daylighting
  94. 100. Daylighting
  95. 101. Transpired Solar Collector
  96. 102. Labyrinth
  97. 103. Labyrinth
  98. 104. Labyrinth
  99. 105. 50 F to 75 F Natural Ventilation
  100. 106. > 70 F Natural Ventilation
  101. 107. Workplace Interiors
  102. 108. Photovoltaic System
  103. 109. 787 KW 540 KW Photovoltaic System
  104. 110. Energy Dashboard Project Energy Goal = 50% better than ASHARE 90.1 and 32.3 kBtu/SF/year Design Energy Savings = 43% better than ASHRAE 90.1 and 32.3 kBtu/SF/year (before renewables) Energy Use Intensity: 2030 Baseline 111 kBtu/SF/year LEED Baseline 56 kBtu/SF/year Design 32 kBtu/SF/year
  105. 111. Energy Dashboard Zero Energy Building: Site ZEB 0 kBtu/SF/year Source ZEB -11 kBtu/SF/year Emissions ZEB -3 LB CO 2e /SF/year PV 1.33 MW B Classification B Classification B Classification
  106. 112. Carbon Dashboard Carbon Emissions: Percent Carbon Emission Reduction = 103% 2030 Baseline 99 LB CO 2e /SF/year Design -3 LB CO 2e /SF/year

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