Explorative life-cycle assessment of renovating existing urban housing-stocks
Artikel i vetenskaplig tidskrift, 2019

Urban building-stocks are responsible for a significant share of resource and energy use. To quantify the potential for reducing energy and environmental impact, building-stock modelling (BSM) is commonly used. Recently, the focus of BSM has expanded to include environmental impacts and life-cycle assessment (LCA). However, impact categories are often limited to climate change and representative buildings are often used. In addition, the future state of the stock is often calculated as a step-change to highlight the technical potential of an ideal future state. The aim of this paper is to assess the environmental impact of the future development of an urban housing-stock under business-as-usual scenarios using a building-specific GIS based model applied to the multi-family building stock of the City of Gothenburg. This paper uses an explorative LCA to account for environmental impacts based on dynamic uptake of common renovation measures and resulting energy savings until 2050. Two main scenarios are used where the renovation logic is based on either end-of-life of components or cost-effectiveness and further divided using limiting factors regarding investment capacity and annual share of the stock to be renovated. Results show possible energy savings of up to 23% and a corresponding 31% reduction in greenhouse-gas emissions. Greenhouse-gas emissions avoided due to reduced energy demand are offset by up to 65% by accounting for material use due to construction related renovation measures. For scenarios that favour construction related interventions, PV panels are responsible for the major part of the environmental impact across the 15 mid-point indicators used.

Explorative LCA

Scenario modelling

Renovation

GIS

Building-stock modelling

Författare

Magnus Österbring

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Erika Mata

IVL Svenska Miljöinstitutet

Liane Thuvander

Chalmers, Arkitektur och samhällsbyggnadsteknik, Arkitekturens teori och metod, Forskning - Arkitekturens teori och metod

Holger Wallbaum

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Building and Environment

0360-1323 (ISSN)

Vol. 165 106391

Omställning mot hållbar tillväxt av byggnadståndet på områdesnivå

Energimyndigheten, 2014-07-01 -- 2017-12-31.

Drivkrafter

Hållbar utveckling

Styrkeområden

Building Futures (2010-2018)

Energi

Ämneskategorier

Miljöanalys och bygginformationsteknik

Annan samhällsbyggnadsteknik

Husbyggnad

DOI

10.1016/j.buildenv.2019.106391

Mer information

Skapat

2019-09-08