Design guidelines for circular building components based on LCA and MFA: The case of the circular kitchen

A. van Stijn*, L. C.M. Eberhardt, B. Wouterszoon Jansen, A. Meijer

*Corresponding author

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

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Abstract

Introduction. The building sector consumes 40% of resources globally, produces 40% of global waste and 33% of all emissions. The transition towards a Circular Economy (CE) in the built environment is vital to achieve Sustainable Development Goals (SDGs) such as responsible consumption and production. The built environment can gradually be made circular by replacing the current 'linear' building components with circular ones during maintenance and renovation. However, there are many possible design alternatives for circular building components; knowledge on which variants perform best - from an environmental perspective - is lacking. Methods. In this article, we develop environmental design guidelines for circular building components. First, we synthesize design variants for an exemplary circular building component: the Circular Kitchen (CIK). Second, we compare the environmental performance of these variants and a 'business-as-usual' variant by applying a Material Flow Analysis (MFA) and Life Cycle Assessment (LCA). Finally, from the results, we derive design guidelines. Results. We synthesized four design variants: (1) a kitchen made from bio-based, biodegradable materials, (2) a kitchen made from re-used materials, (3) a kitchen which optimises lifespans and materials, and (4) a modular kitchen in which components (with varying lifespans) are re-used by the manufacturer. From the LCA and MFA, we derived 7 design guidelines, which include: consider building components as a composite of sub-components, parts and materials with different and multiple use-, and life-cycles; match the materialisation of each part with the expected life cycle (merely substituting for re-used or low-impact materials does not provide the most circular design); facilitate various loops (e.g., repair, re-use, recycling) simultaneously. Conclusions. The presented design guidelines can support industry in developing circular building components and, through implementation of these components, support the creation of a circular built environment
Original languageEnglish
Title of host publicationConference Proceedings : World Sustainable Built Environment online conference BEYOND 2020 : 2- 4 November 2020
EditorsHolger Walbaum, Alexander Hollberg, Liane Thuvander, Paula Femenias, Izabela Kurkowska, Kristin Mjörnell, Colin Fudge
Number of pages8
PublisherIOP Publishing
Publication date20 Nov 2020
Pages1-8
Article number042045
DOIs
Publication statusPublished - 20 Nov 2020
EventWorld Sustainable Built Environment - Beyond 2020, WSBE 2020 - Gothenburg, Sweden
Duration: 2 Nov 20204 Nov 2020

Conference

ConferenceWorld Sustainable Built Environment - Beyond 2020, WSBE 2020
CountrySweden
CityGothenburg
Period02/11/202004/11/2020
SponsorAutodesk Construction Cloud, Bona, Construction Industry Council, et al., HKGBC, Skanska
SeriesIOP Conference Series: Earth and Environmental Science
Number4 (1.11-1.14)
Volume588
ISSN1755-1307

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