Comparative Life-Cycle Analysis of Building Materials for the Thermal Upgrade of an Existing Building

SBE19 Brussels - BAMB-CIRCPATH "Buildings as Material Banks - A Pathway For A Circular Future"

Piccardo, C.^1 ; Dodoo, A.^2 ; Gustavsson, L.^2 ; Tettey, U.Y.A.^2

Department of Architecture and Design, University of Genoa, Genoa

16123, Italy^1

Department of Built Environment and Energy Technology, Linnaeus University, Växjö

SE-35195, Sweden^2

关键词: Building envelopes;    Energy performance;    Energy-efficiency strategies;    Entire life cycles;    Life cycle analysis;    Life cycle primary energies;    Primary energy use;    Thermal buildings;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/225/1/012044/pdf
DOI  :  10.1088/1755-1315/225/1/012044

来源: IOP

【 摘 要 】

The existing building stock is estimated to need major renovations in the near future. At the same time, the EU energy-efficiency strategy entails upgrading the energy performance of renovated buildings to meet the nearly-zero energy standard. To upgrade existing buildings, two main groups of measures can be adopted: thermally-improved building envelope and energy-efficient technical devices. The first measure usually involves additional building materials for thermal insulation and new building cladding, as well as new windows and doors. A number of commercially-available materials can be used to renovate thermal building envelopes. This study compares the life-cycle primary energy use and CO2 emission when renovating an existing building using different materials, commonly used in renovated buildings. A Swedish building constructed in 1972 is used as a case-study building. The building's envelope is assumed to be renovated to meet the Swedish passive house standard. The entire life cycle of the building envelope renovation is taken into account. The results show that the selection of building materials can significantly reduce the production primary energy and associated CO2 emissions by up to 62% and 77%, respectively. The results suggest that a careful material choice can significantly contribute to reduce primary energy use and CO2 emissions associated with energy renovation of buildings, especially when renewable-based materials are used.