TY - JOUR
T1 - Achieving a holistic view of the life cycle performance of existing dwellings
AU - Famuyibo, A. A.
AU - Duffy, A.
AU - Strachan, P.
PY - 2013/12
Y1 - 2013/12
N2 - Models which fully evaluate the life cycle energy and greenhouse gas (GHG) emissions of national housing stocks are not reported in literature. Capturing a holistic view of energy and emissions of the residential sector is an important process that can lead to a more effective policy making. This paper presents a methodology which evaluates the life cycle energy and GHG emissions of retrofitting housing stocks considering all life cycle stages and incorporating, to the greatest extent possible, all upstream inputs.To achieve this, we developed a hybrid model of the existing Irish housing stock, comprising a process-based approach supplemented by input - output LCA for installation of materials and fit-outs and maintenance of appliances. Life cycle analysis (LCA) is a commonly accepted technique for evaluating cradle-to-grave environmental impacts of a product. Using an assumed 50-year life span in all cases, representative archetypes were used to estimate the performance along retrofitting, operation, maintenance and disassembly phases of the three selected house retrofit scenarios: BaseCase (no intervention), Current Standards (retrofitting to meet current building regulations) and Passive House (retrofitting to meet Passive House Standards).Results show that detached houses displayed the highest range of life cycle energy and exhibited the greatest absolute and percentage reductions compared to other house types, as life cycle energy ranges from 386 - 614kWh/m2yr, 225 - 261kWh/m2yr and 126 - 137kWh/m2yr for all house scenarios, respectively. Using these results an assessment is provided for policy makers on a holistic view of the life cycle performance of existing dwellings.
AB - Models which fully evaluate the life cycle energy and greenhouse gas (GHG) emissions of national housing stocks are not reported in literature. Capturing a holistic view of energy and emissions of the residential sector is an important process that can lead to a more effective policy making. This paper presents a methodology which evaluates the life cycle energy and GHG emissions of retrofitting housing stocks considering all life cycle stages and incorporating, to the greatest extent possible, all upstream inputs.To achieve this, we developed a hybrid model of the existing Irish housing stock, comprising a process-based approach supplemented by input - output LCA for installation of materials and fit-outs and maintenance of appliances. Life cycle analysis (LCA) is a commonly accepted technique for evaluating cradle-to-grave environmental impacts of a product. Using an assumed 50-year life span in all cases, representative archetypes were used to estimate the performance along retrofitting, operation, maintenance and disassembly phases of the three selected house retrofit scenarios: BaseCase (no intervention), Current Standards (retrofitting to meet current building regulations) and Passive House (retrofitting to meet Passive House Standards).Results show that detached houses displayed the highest range of life cycle energy and exhibited the greatest absolute and percentage reductions compared to other house types, as life cycle energy ranges from 386 - 614kWh/m2yr, 225 - 261kWh/m2yr and 126 - 137kWh/m2yr for all house scenarios, respectively. Using these results an assessment is provided for policy makers on a holistic view of the life cycle performance of existing dwellings.
KW - Archetypes
KW - Holistic view
KW - Housing stock
KW - Life cycle energy
UR - http://www.scopus.com/inward/record.url?scp=84884221724&partnerID=8YFLogxK
U2 - 10.1016/j.buildenv.2013.08.016
DO - 10.1016/j.buildenv.2013.08.016
M3 - Article
AN - SCOPUS:84884221724
SN - 0360-1323
VL - 70
SP - 90
EP - 101
JO - Building and Environment
JF - Building and Environment
ER -