Life Cycle Energy and GHG Emissions Reduction of Retrofit Options for Existing Dwelling Stock
Serious carbon mitigation in the building sector requires full consideration of life cycle energy consumption(both embodied and operating energy),and their related greenhouse gas(GHG)emissions,over the life span of the dwelling stock.We analyse herein the life cycle energy and related GHG emissions of the pre-2005 residential housing stock in the Greater Melbourne Area(GMA),comprising of 31 municipalities or Local Government Areas(LGAs),considering various retrofit options that range from relatively cheap and easy(e.g.,draught sealing)to relatively expensive(e.g.,double glazing of windows).Operational energy savings are calculated based on representative performance of energy-rated detached and semi-detached dwellings using the Australian residential rating scheme(i.e.,a bottom-up approach),while the embodied energy and GHG emissions are calculated using a multi-regional input-output analysis(i.e.,a top-down approach).If all the buildings are improved to the level of a 6-energy rated dwelling across GMA,we can save about 25.5 TWh/year in heating and cooling energy,which translates to 6.25 million tons of GHG reduction every year.However,the retrofit program will consume 4.75 TWh of embodied energy or 1.89 million tons of embodied GHG emissions,which is equivalent to 50%of the annual heating and cooling energy or 81%of the operational GHG emissions due to heating and cooling of dwellings.The energy reduction in building operations will remain to be the dominant driver for retrofit,but the contribution of the embodied impacts cannot,and should not,be ignored.
urban regeneration climate mitigation residential buildings
Seongwon SEO Greg FOLIENTE Zhengen REN
Urban Panaceas,Australia University of Melbourne,Australia;nBLue Pty Ltd,Australia CSIRO,Australia
国际会议
2017世界可持续建筑环境大会(the World Sustainable Built Environment Conference)
香港
英文
1152-1159
2017-06-05（万方平台首次上网日期，不代表论文的发表时间）