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Approche de l’évaluation du cycle de vie d’un immeuble entier pour appuyer la prise de décision en matière de bâtiments durables.

A whole building life-cycle assessment approach to support decision-making for sustainable buildings.

Numéro : 3563

Auteurs : ZHANG H., CAI J., BRAUN J. E.

Résumé

Buildings account for 39% of the CO2 emissions in the U.S. Although emerging building energy-efficient technologies lead to improved energy efficiency and lower environmental impact in the operational phase, not much attention has been paid to the environmental impact associated with the materials and manufacturing of the building mechanical systems. This paper presents an integrated life-cycle assessment method for buildings that accounts for the embodied and use phase carbon impacts of the building and its mechanical systems. The proposed methodology relies on EnergyPlus to generate the use-phase energy consumption for any given building. A material 'grabber' routine was developed to automatically extract building envelope material information from EnergyPlus models, which is then used for envelope embodied carbon analysis. For the mechanical equipment, embodied carbon accounting was performed for two representative air-conditioning and heat pump units: a 4-ton packaged unit and a 4-ton split heat pump. The different elements were incorporated in the overall life-cycle assessment tool along with lighting embodied data to allow generation of a whole building environmental performance report. Five Department of Energy commercial building prototypes were used as case studies and analysis results for seven U.S. climate locations are presented in this paper. The results show that for the investigated prototypical buildings, the use phase energy consumption has a dominant impact on the overall building environmental performance: the embodied carbon contribution is less than 9% for all considered cases. However, the tradeoffs could change dramatically as the U.S. moves towards net-zero buildings and the tool presented in this paper could be used to consider these tradeoffs.

Documents disponibles

Format PDF

Pages : 10

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : A whole building life-cycle assessment approach to support decision-making for sustainable buildings.
  • Identifiant de la fiche : 30028659
  • Langues : Anglais
  • Sujet : Technologie, Environnement
  • Source : 2021 Purdue Conferences. 6th International High Performance Buildings Conference at Purdue.
  • Date d'édition : 24/05/2021
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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