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Building eco-design at competjtjon stage: a case study
Marion Sié, Jérôme Payet Jean-Marie Gaide, Matuhieu Cambuzat
Content
- Context, goal and scope
- Eco-design process
- Conclusions and perspectjves
Building eco-design at competjtjon stage: a case study Marion Si, - - PowerPoint PPT Presentation
Building eco-design at competjtjon stage: a case study Marion Si, - - PowerPoint PPT Presentation
Building eco-design at competjtjon stage: a case study Marion Si, Jrme Payet Jean-Marie Gaide, Matuhieu Cambuzat Content Context, goal and scope Eco-design process Conclusions and perspectjves Context, goal
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Context, goal and scope
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Context
- Tekhnê Architectes made a proposal during an
architectural design competjtjon for the constructjon of a secondary school.
- Tekhnê included a Life Cycle Assessment (LCA)
in their proposal.
- Cycleco took over this LCA and decided to
deepen the interpretatjon phase in order to use it as of a case study for training purposes.
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Goal
- Tekhnê’s objectjves:
– Meet building owner’s requirement: assess embodied energy – Stand out from the competjtors by going one step further and providing a comparison of 2 scenarios
- n primary energy and climate change impacts
- Cycleco’s objectjves:
– Validate Tekhne’s conclusions by extending the analysis to a more complete set of indicators – Adjust design according to impacts results
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Scope
- Functjonal unit: “Provide an enclosed and
insulated space of 1544m2 fmoor area, with an energy consumptjon <120kWhep/m2/year, for use as a secondary school during 60 years.”
- Scenarios:
– a wood-framed building (favourite scenario) – a shutuered concrete building
- System boundaries:
– Structure, interior & fjnishing work packages – Included processes: manufacture, transport, installatjon, deconstructjon and landfjll of building products (constructjon and replacements)
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Eco-design process
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Firsts results
Non-renewable primay energy Climate change
0% 100%
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Extended set of indicators
Human tox (non-carci) Climate change Respiratory inorganics Water depletjon Fresh water eutroph. Ionizing radiatjon - HH Fresh water ecotox. Human tox (carci) Land use Terrestrial and aquatjc acid. Mineral & fossil res. deplet° 0% 50% 100% Wood-framed building Shutuered concrete building
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Comparison of structures
Human tox (non-carci) Climate change Respiratory inorganics Water depletjon Fresh water eutroph. Ionizing radiatjon - HH Fresh water ecotox. Human tox (carci) Land use Terrestrial and aquatjc acid. Mineral & fossil res. deplet° 0% 50% 100% Wood-frame Shutuered concrete structure
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Wood-framed building hot spots analysis
Human toxicity (non- carcinogens) Fresh water eutrophicatio n Ionizing radiations (HH) Terrestrial and aquatic acidification Resources depletion Mineral insulation Glazing Sealing Linole um Plaster boards Other Studs and tracks Ceramic tiles Bio- sourced insulation
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Comparison with a third alternatjve
Human toxicity - non-carcinogens Climate change Respiratory inorganics Water depletjon Fresh water eutrophicatjon Ionizing radiatjon - HH Fresh water ecotoxicity Human toxicity - carcinogens Land use Terrestrial and aquatjc acidifjcatjon Mineral & fossil resources depletjon 0% 50% 100% Wood-framed building Shutuered concrete building Wood-framed building with wood beams
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Conclusions and perspectjves
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Study outcomes
- It is of main importance to study the whole
system
- Hot spots analysis is a valuable tool for eco-design
- It is of main importance to enlarge the scope of
indicators
- Hot spots analysis should be conducted on
indicators for which the “a priori” favourite scenario is not the best
- Eco-design is accessible to building professionals
at competjtjon stage
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Thank you
Contact : marion.sie@cycleco.eu