advanced construction technology
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Advanced Construction Technology. By Professor Chris Gorse – licensed under the Creative Commons Attribution – Non-Commercial – Share Alike License http://creativecommons.org/licenses/by-nc-sa/2.5/. Sustainability and construction. Christopher Gorse. One Definition of Sustainable Development?. - PowerPoint PPT PresentationTRANSCRIPT
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Advanced Construction Technology
By Professor Chris Gorse – licensed under the Creative Commons Attribution – Non-Commercial – Share Alike License
http://creativecommons.org/licenses/by-nc-sa/2.5/
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Sustainability and construction
Christopher Gorse
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Gro Harlem Bruntland
Prime Minister of Norway 1981-1996
2002 World Summit on Sustainable Development
One Definition of Sustainable Development?
“Development that meets the needs of the present without compromising
the ability of future generations to meet their own needs”
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Approximate estimates on energy use
• Buildings 50%
• Industry 25%
• Travel 25%
» Nightingale associates 2008
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Global warming modelsLook at the met office site and the
models of global warming
http://www.metoffice.gov.uk/research/hadleycentre/models/modeldata.html
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Can increase in CO2 be explained by volcanic eruptions, natural, orbital change etc.
www.metoffice.gov.uk
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Sustainable? Zero CarbonGovernment targets!
• Domestic buildings should be zero carbon by 2016
• Non-domestic buildings should be zero carbon by 2019
• Existing buildings?
• New buildings only account for 1%?
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Building Research Establishment (BRE 2002)
published a guide to assist developers when identifying
sustainability issues.
Issues include:
• Land Use, Urban Form and Design
• Transport
• Energy
• Impact of individual buildings
• Natural resources
• Ecology
• Community
• Business
A sustainability checklist for development
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BREEAM
Building Research Establishment Environmental Assessment Model
BREEAM provides a numerical weighting system that is applied to new and existing buildings to assess their ‘sustainability’.
www.breeam.org
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BREEAM Categories and weightings
• Management 15%• Health and Welfare 15%• Energy 13.6%• Transport 11.4%• Water 5%• Materials 10%• Land use 15%• Pollution 15%
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Trained assessors score category
• The BREEAM assessor awards a numerical score to each category and the scores are totalled to give an overall rating.
• The designated BREEAM ratings of pass, good, very good or excellent can be awarded.
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Minimum score required to achieve BREEAM rating
• Pass 25
• Good 40
• Very Good 55
• Excellent 70
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Capital cost of sustainable construction – one
model
‘The Price of Sustainable Schools’ – BRE (2008) – The following is
for a Secondary School:
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Low Carbon – Zero Carbon Buildings
Practical solutions?
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Thermal performance
•Preventing cold bridges
•Insulating
•Using thermal mass
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Airtightness
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Gaps cause real problems – cavities should be sealed and air-barriers maintained.
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Air leakage
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Solar
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• Photovoltaic
• Solar thermal panel – solar collectors
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Wind power
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Natural ventilation
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www.heatpumps.co.uk/thebasics.htm
Ground air heat pumps
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Code for Sustainable Homes
• Now mandatory for all new homes to have a rating against the Code.
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• In April 2007 the Code for Sustainable Homes replaced Ecohomes for the assessment of new housing in England. The Code is an environmental assessment method for new homes based upon BRE’s Ecohomes and contains mandatory performance levels in 6 key areas
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1. Energy efficiency /CO2 2. Water efficiency 3. Surface water management 4. Site Waste Management 5. Household Waste Management 6. Use of Materials 7. Lifetime homes (applies to Code Level 6
only)
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Some useful websites
• www.greenspec.co.uk• www.gaxeley.com• www.passive-on.org/en• www.berr.gov.uk• www.carboncounting.co.uk• www.ncm.bre.co.uk• www.smartwaste.co.uk• www.thegreenguide.org.uk• www.cyrilsweett.co.uk• www.carbonlite.org.uk• www.seda2.org