Principles of Sustainable Construction Chapter 10.
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Transcript of Principles of Sustainable Construction Chapter 10.
Principles of Sustainable Construction
Chapter 10
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Embodied Energy in a building
The amount of energy consumed by all the processes involved in the production of a building, including Mining Manufacturing Transportation Construction Administrative functions
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Ozone depletion
Ozone layer of atmosphere, located 10-20 miles from earth’s surface, blocks ultraviolet rays from reaching surface
Environmental pollutants react with ozone, break the ozone - oxygen cycle, and deplete the ozone layer Increase harmful effects of UV-B rays that cause
Skin cancer Eye cataracts Weakened immune system
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Global warming
“Greenhouse gases” (carbon dioxide, methane, nitrous oxide, water vapor) present in the atmosphere prevents earth’s longwave radiation from leaving the surface.
Increasing levels of pollution have greatly increased greenhouse effect, raising the temperature of the earth.
Continued increases will melt polar ice caps, raise sea levels, change climate, alter ecosystems, etc.
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Buildings in US
Use 36% of total energy Use 30% of raw materials Use 12% of potable water Produce 30% of total waste Emit 30% of greenhouse gases
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Central premise of sustainability
“The needs of the world’s people are met without compromising the ability of the future generations to meet their needs.”
Brundtland Report to the United Nations1987
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Fundamentals of sustainable architecture
Integrated site design Water conservation Energy conservation & atmosphere protection Resource efficiency Healthy indoor environment
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Ecolabeling of buildings
System developed for rating the sustainability of a building’s design and performance In US, LEED (Leadership in Energy and
Environmental Design) is most widely adopted system, in early stages of development
Rating system based on building type - continuing to add new categories
LEED-NC New Construction LEED-EB Existing Buildings LEED-CI Commercial Interiors LEED-H Homes
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
LEED criteria and certification levels
LEED rating criteria Sustainable sites (maximum 14 points) Water efficiency (maximum 5 points) Energy and atmosphere (maximum 17 points) Materials and resources (maximum 13 points) Indoor environmental quality (maximum 15 points) Innovation and design process (maximum 5 points)
LEED certification levels Certified 26-32 Silver 33-38 Gold 39-51 Platinum 52-69
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Categories of LEED rating system
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Building Commissioning
Systematic evaluation of all active building systems to verify components have been properly installed and function interactively Often conducted by an independent
commissioning authority Conducted before building is turned over to owner
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Green Building Products - materials with a low overall environmental burden
Renewable resource Recoverable or reusable Recyclable or recycled content Biodegradability Low resource (energy & water) consumption
Manufcturing, transportation and operations
Limit impacts on consumer health Durable, good life-cycle assessment
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Closed-loop product life-cycle
Mehta, Scarborough, and Armpriest : Building Construction: Principles, Materials, and Systems
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Eco-labeling products
No widely adopted comprehensive rating system exists yet in US
Some rating systems address limited criteria Energy Star - home and office appliances based on
energy consumption Certified Wood - based on forest harvesting practices Green Label - low VOC emissions in carpets and rugs Green Seal - life cycle evaluation based on EPA & ISO
(International Standards Organization) standards. Not widely used.