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Life cycle assessment of energy conservation measures during early stage office building design: A case study in London, UK

Azzouz, A; Borchers, M; Moreira, J; Mavrogianni, A; (2017) Life cycle assessment of energy conservation measures during early stage office building design: A case study in London, UK. Energy and Buildings , 139 pp. 547-568. 10.1016/j.enbuild.2016.12.089. Green open access

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Abstract

Embodied versus operational environmental indicators are often studied in isolation. This paper presents a cradle-to-grave Life Cycle Analysis of energy conservation measures for a planned large, medium-rise office building in central London, UK with Gross Floor Area of 15,590 m2 and a 60-year building lifetime. The original design complied with the UK Building Regulations Part L, achieving 40% operational carbon emission savings compared to Target Emissions Rate. The LCA solutions focused on structure, envelope, and operational systems. Embodied energy saving strategies encompassed the application of lean design principles and integration of low carbon materials. Operational energy saving techniques included the adoption of a fabric-first approach, adaptive thermal conditions and sustainable building systems. Cumulatively, these optimization strategies achieved a maximum of 16% and 13% savings on life cycle carbon and energy, respectively, compared to the original design. Embodied strategies saved 32% and 9% on embodied carbon and energy, respectively, while operational strategies reduced the original consumption by 14% on both indicators. Over a 60-year building lifetime, operational energy was 10 times higher than embodied energy, while operational carbon was 8 times higher than embodied carbon. The study findings have highlighted the significance of LCA for early stage building design decisions.

Type: Article
Title: Life cycle assessment of energy conservation measures during early stage office building design: A case study in London, UK
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.enbuild.2016.12.089
Publisher version: http://doi.org/10.1016/j.enbuild.2016.12.089
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Life cycle assessment, Life cycle analysis, Embodied energy, Operational energy, Design optimization, Office building
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources
URI: https://discovery.ucl.ac.uk/id/eprint/1552588
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