Impact of Temperature Change on Energy Consumption of Residential Building in East China

Based on the mean daily temperature data from 478 meteorological stations during 1961-2007 and those from RegCM3 model during 2010-2039,the spatial and temporal variations of heating and cooling degree-days and their relationships with the temperature variation in East China were analyzed.The results indicated that from 1961 to 2007,heating degree-days firstly increased and then decreased,but cooling degree-days firstly decreased and then increased in East China.The heating degree-days will decrease and the cooling degree-days will increase continuously in East China during 2010-2039.Spatially,the heating degree-days basically decrease in the whole East China in the past 47 years and in the future 30 years,with more decrease in the northern parts and less decrease in the southern parts of East China.The cooling degree-days increased more in the Yangtze Delta regions,the eastern parts of Zhejiang and Fujian in the past 47 years,but in the future 30 years,they will increase more in the central and western parts of East China,and less in the northern parts and eastern coastal areas of East China.There are high correlations between the variations of heating and cooling degree-days and those of temperature.In the past 47 years,the heating degree-days decreased by 7.1%,and the cooling degree-days increased by 16.7% in East China due to the rise of temperature.In the future 30 years,temperature will rise significantly,and the heating degree-days will decrease by 8.2%,and the cooling degree-days will increase by 29.6% compared with those during the period from 2010 to 2019.