![“In five years, anyone would be crazy to design a
building that isn’t green. But I’ll bet you that ... in five
years [it] won’t just be about green buildings. It will
be about zero net energy buildings, and about
technologies to increase the amount of excess energy
building owners can sell on the grid.”
- Former President Bill Clinton, Greenbuild Keynote Address, November 2007](https://image.slidesharecdn.com/achievingnetzeroenergyatscalegb12111512-121117152814-phpapp02/75/Achieving-net-zero-energy-at-scale-gb12-111512-4-2048.jpg)
Uploaded byTom Hootman
Achieving net zero energy at scale gb12 111512
The document discusses strategies for achieving net zero energy buildings, focusing on trends, overcoming barriers, and best practices such as performance-based procurement and integrated renewable energy. It highlights the importance of transforming project delivery to mainstream net zero energy. Additionally, it emphasizes the necessity for building design to evolve towards sustainability and energy efficiency, anticipating a future where net zero energy buildings will be the standard.
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Achieving net zero energy at scale gb12 111512
- 1. Tom Hootman, AIA,LEED AP BD+C David Okada, PE, LEED AP Shanti Pless, LEED AP RNL, Director of Sustainability Mechanical Engineer NREL, Commercial Buildings Research Group
- 2. 1. Review trends for achieving net zero energy buildings 2. Adopt key practices in delivering net zero energy projects 3. Overcome cost, technology, and perception barriers 4. Transform the delivery process to mainstream net zero energy buildings
- 3. Introduce net zeroenergy approach 6 best practices for net zero energy 1. Performance-based procurement 2. Predicting energy use 3. Passive architecture and load reduction 4. Low energy active systems 5. Integrated renewable energy 6. Zero energy operation
- 4. “In five years,anyone would be crazy to design a building that isn’t green. But I’ll bet you that ... in five years [it] won’t just be about green buildings. It will be about zero net energy buildings, and about technologies to increase the amount of excess energy building owners can sell on the grid.” - Former President Bill Clinton, Greenbuild Keynote Address, November 2007
- 5. WHO IS WORKINGON NET ZERO ENERGY?
- 6. HOW IS NETZERO ENERGY DEFINED?
- 8. Net Zero SiteEnergy Building Net Zero Source Energy Building Net Zero Energy Emissions Building Net Zero Energy Cost Building
- 9. WHAT TYPE OF PROJECTSCAN ACHIEVE NET ZERO ENERGY?
- 10. WHAT TYPE OF PROJECTSCAN’T ACHIEVE NET ZERO ENERGY?
- 11. A: Within theBuilding Footprint B: (A +) Within the Site C: (A /B +) Imported Renewables D: (A/B/C +) Off-Site or Purchased RECs
- 12. HOW MANY NET ZEROENERGY BUILDINGS ARE THERE?
- 13. 1 1 1 1 2 1 1 1 6 1 1 1 1 New Buildings Institute Getting to Zero 2012 Status Update: A First Look at the Costs and Features of Zero 2 Energy Commercial Buildings (March 2012)
- 14. 13 11 1K-5K 5K-10K 10K-25K 19 5 25K-50K 8 50K-100K 4 >100K New Buildings Institute Getting to Zero 2012 Status Update: A First Look at the Costs and Features of Zero Energy Commercial Buildings (March 2012)
- 17. 1 Performance-based 4 Low energy active procurement systems 2 Predicting energy use 5 Integrated renewable energy 3 Passive architecture 6 Zero energy operation and load reduction
- 18. 1 Performance-based 4 Low energy active procurement systems 2 Predicting energy use 5 Integrated renewable energy 3 Passive architecture 6 Zero energy operation and load reduction
- 19. I want agreen building Design a LEED <rating> building Design a building to use 30% less energy than ASHRAE 90.1-2004 Design a building to use less than 25,000 BTU/sqft Design a net zero energy building
- 20.
- 22. 1. Mission Critical Safety LEED Platinum Energy Star 2. Highly Desirable 800 staff Capacity 25kBTU/ft2/year Substantial Completion by 2010 3. If Possible Net zero design approach Visual displays of current energy efficiency National and global recognition and awards
- 25. 1 Performance-based 4 Low energy active procurement systems 2 Predicting energy use 5 Integrated renewable energy 3 Passive architecture 6 Zero energy operation and load reduction
- 26. New Buildings Institute EnergyPerformance of LEED for New Construction Buildings (March 2008)
- 27. “G1.2.2. Neither theproposed building performance nor the baseline building performance are predictions of actual energy consumption or costs for the proposed design after construction. Actual experience will differ from these calculations due to variations such as occupancy, building operation and maintenance, weather, energy use not covered by this procedure, changes in energy rates between design of the building and occupancy, and the precision of the calculation tool.” – ASHRAE Standard 90.1
- 28. PREDICTIVE MODELING (Absolute energy target) VERSUS COMPLIANCE MODELING (Percent better than ASHRAE 90.1)
- 29. CONCEPT DESIGN CONSTRUCTION OPERATIONS CHARRETTE MODEL AS-DESIGNED MODEL LEED MODEL + BASELINE AS-BUILT MODEL OPERATIONS MODEL
- 31. Monthly EUI (kBtu/ft2) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.5 4.0 Model RSF PV Model RSF PV Model RSF PV Model RSF PV Model RSF PV Model RSF PV Model RSF PV Model RSF PV Model RSF PV Model RSF PV Model RSF PV Model RSF PV Cooling Heating Lighting Plug Loads Data Center are demand side values Mechanical Systems Note: The annual EUI values
- 32. 4.5 4.0 3.5 3.0 PV Data Center Mechanical Systems 2.5 Monthly EUI (kBtu/ft2) Plug Loads Lighting 2.0 Heating Cooling 1.5 1.0 0.5 0.0 RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV Model Model Model Model Model Model Model Model Model Model Model Model Note: The annual EUI values are demand side values
- 33. 4.5 36 The PV system is sized 4.0 32 for an annual EUI of 35.1 kBtu/ft2. 3.5 28 3.0 24 PV Data Center Annual EUI (kBtu/ft2) 2.5 20 Mechanical Systems Plug Loads Monthly EUI (kBtu/ft2) Lighting 2.0 16 Heating Cooling 1.5 12 Model Annual EUI RSF Annual EUI 1.0 8 0.5 4 0.0 0 RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV Model Model Model Model Model Model Model Model Model Model Model Model October November December January February March April May June July August September Note: The annual EUI values 2010 2010 2010 2011 2011 2011 2011 2011 2011 2011 2011 2011 are demand side values
- 34. 1 Performance-based 4 Low energy active procurement systems 2 Predicting energy use 5 Integrated renewable energy 3 Passive architecture 6 Zero energy operation and load reduction
- 35. Passive Design Efficient Systems Renewable Energy Integrated Delivery
- 36. 1 60 ft. Wide Office Wings 2 Interior Thermal Mass 1 3 Thermal Labyrinth 4 Daylighting 5 Natural Ventilation 6 Low Window to Wall Ratio 7 Transpired Solar Collectors 8 Open Workplace 4 5 8 2 7 6 3
- 39. Energy driven form Conventional form 115,000 SF 65,000 SF
- 41. <30% >70% Window to Wall Ratio Window to Wall Ratio
- 46. 1 Performance-based 4 Low energy active procurement systems 2 Predicting energy use 5 Integrated renewable energy 3 Passive architecture 6 Zero energy operation and load reduction
- 47. Ambient lighting with daylight sensors for 25 fc 6 watt task light Ambient daylight 50 fc
- 55. 1 Performance-based 4 Low energy active procurement systems 2 Predicting energy use 5 Integrated renewable energy 3 Passive architecture 6 Zero energy operation and load reduction
- 59. 5% 10% 15% 20% 4.6 9.3 13.9 18.6 watt/ft 2
- 60. <75 <37 kBtu/ft2/yr kBtu/ft2/yr <25 <18 kBtu/ft2/yr kBtu/ft2/yr Based on Boulder, Colorado solar data.
- 63. 1 Performance-based 4 Low energy active procurement systems 2 Predicting energy use 5 Integrated renewable energy 3 Passive architecture 6 Zero energy operation and load reduction
- 64. Operators Occupants Executives IT Managers Food Service HR Managers
- 65. Coordinate with Commissioning Coordinate with O&M Plan Plan Energy Information System Analyze and Report Energy Data
- 66. Manage Plug andProcess Loads Educate and Train Occupants Plan for Future Changes Celebrate Success!
- 68. 4.5 4.0 3.5 3.0 PV Data Center Mechanical Systems 2.5 Monthly EUI (kBtu/ft2) Plug Loads Lighting 2.0 Heating Cooling 1.5 1.0 0.5 0.0 RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV RSF PV Model Model Model Model Model Model Model Model Model Model Model Model Note: The annual EUI values are demand side values
- 69. SAVE A SEATFOR YOUR DESIGN- BUILD TEAM?
- 70. 1 Performance-based 4 Low energy active procurement systems 2 Predicting energy use 5 Integrated renewable energy 3 Passive architecture 6 Zero energy operation and load reduction
- 71. Tom Hootman, AIA,LEED AP BD+C RNL, Director of Sustainability tom.hootman@rnldesign.com David Okada, PE, LEED AP BD+C daveokada@gmail.com Shanti Pless, LEED AP NREL, Commercial Buildings Research Group shanti.pless@nrel.gov www.facebook.com/NetZeroEnergyDesign www.nrel.gov/rsf