Impact of Temperature Change on Heating and Cooling Energy Consumption of Residential Buildings in East China

Based on the mean daily temperature data from 446 meteorological stations during 1961-2007 and those from RegCM3 model during 2010-2039,the impact of temperature change on heating and cooling energy consumption of residential buildings in East China were studied by the method of degree-days with 10 ℃ and 22 ℃ as the baseline temperature of heating degree-days and cooling degree-days.The results indicate that from 1961 to 2007,heating degree-days and the sum of heating degree-days and cooling degree-days decreased basically in the whole East China,with more decrease in the northern part and less decrease in the southern part of East China,and cooling degree-days increased in most part of East China,with more increase in the Yangtze Delta region,the eastern part of Zhejiang and the coastal areas of Fujian.During the period from 2010 to 2039,heating degree-days will decrease continuously in the whole East China,with more decrease in the northern part and less decrease in the southeastern part of East China,and cooling degree-days will increase continuously in the whole East China,with more increase in the southern part and less increase in the northern part and coastal areas.The sum of heating degree-days and cooling degree-days will decrease in the northern part and increase in the southern part of East China during 2010-2039.In the past 47 years,the decrease of heating degree-days was much more than the increase of cooling degree-days in East China,so temperature change on the whole was favorable to the decrease of energy consumption of residential buildings.In the future 30 years,the decrease of heating degree-days was close to the increase of cooling degree-days in East China,so the impact of temperature change on energy consumption of residential buildings will be little.