Environmental impact of buildings - what matters?
Artikel i vetenskaplig tidskrift, 2015

The goal of this study was to identify drivers of environmental impact and quantify their influence on the environmental performance of wooden and massive residential and office buildings. We performed a life cycle assessment and used thermal simulation to quantify operational energy demand and to account for differences in thermal inertia of building mass. Twenty-eight input parameters, affecting operation, design, material, and exogenic building properties were sampled in a Monte Carlo analysis. To determine sensitivity, we calculated the correlation between each parameter and the resulting life cycle inventory and impact assessment scores. Parameters affecting operational energy demand and energy conversion are the most influential for the building’s total environmental performance. For climate change, electricity mix, ventilation rate, heating system, and construction material rank the highest. Thermal inertia results in an average 2-6% difference in heat demand. Non-renewable cumulative energy demand of wooden buildings is 18% lower, compared to a massive variant. Total cumulative energy demand is comparable. The median climate change impact is 25% lower, including end-of-life material credits and 22% lower, when credits are excluded. The findings are valid for small offices and residential buildings in Switzerland and regions with similar building culture, construction material production, and climate.

Författare

Niko Heeren

Eidgenössische Technische Hochschule Zürich (ETH)

Christopher L Mutel

Paul Scherrer Institut

Bernhard Steubing

Eidgenössische Technische Hochschule Zürich (ETH)

York Ostermeyer

Chalmers, Bygg- och miljöteknik, Byggnadsteknologi

Holger Wallbaum

Chalmers, Bygg- och miljöteknik, Byggnadsteknologi

Stefanie Hellweg

Eidgenössische Technische Hochschule Zürich (ETH)

Environmental Science & Technology

0013-936X (ISSN) 1520-5851 (eISSN)

16 9832-9841

Drivkrafter

Hållbar utveckling

Styrkeområden

Building Futures

Energi

Ämneskategorier

Miljöanalys och bygginformationsteknik

Energisystem

DOI

10.1021/acs.est.5b01735

Mer information

Senast uppdaterat

2018-04-11