In recent years,buildings oriented for ultra-low-energy and near-zero-energy targets have received increasing attentions. With the energy-saving targets shifting to the existing building stock,the energy-saving retrofit has shown great potential. Taking a typical residential building in cold region as the case study,the energy-saving retrofitting design oriented for ultra-low energy consumption along with the carbon emission calculation were conducted. 30 groups of exterior wall insulation schemes,30 groups of roof insulation schemes and 4 groups of exterior window schemes were simulated,as well as the sensitivity analysis for selecting the optimized transformation design scheme. When compared with the benchmark building and the building before retrofit,the energy-saving rates were 57.1% and 72.1% respectively. The carbon emission factor method was adopted to measure the carbon emissions of the building before retrofit and 58 groups of simulation schemes. Based on the results,it can be concluded that,while comparing with the optimized scheme,the carbon emission of the building before retrofit can be reduced by 84.2%,and the design scheme can be further optimized,so as to provide theoretical and practical references for the energy-saving transformation oriented for ultra-low energy residential buildings in cold region.
ultra-low energy housingenergy-saving retrofittingsimulation for energy consumptioncarbon emissionsincremental costs