南充市冷-热度日变化及其对气候变暖的响应

The Variation of Cooling and Heating Degree Days and Its Response to Climate Warming in Nanchong

利用1985—2015年气温资料计算了南充热/冷度日(HDD/CDD)及其建筑物单位面积耗电量,分析了度日和能耗的变化特征及其与气温的关系.结果表明,南充平均月HDD以1月最大(354.70℃·d),7—8月为0℃·d,平均年HDD为1 308℃·d;CDD以8月最大(67.17℃·d),11月至次年3月为0℃·d,平均年CDD为163℃·d;CDD和单位建筑面积的制冷耗电量与气温三者存在正相位关系,均呈上升趋势,其中CDD的突变时间是2006年,而HDD则表现出反相位的下降趋势,突变发生于1998年;HDD年变化趋势比CDD更明显,表明在气候变暖特别是冬季明显增温背景下,南充冷季采暖能耗在减少,而夏季制冷能耗在增加。

Energy conservation and emission reduction are important adaptation measures taken for the global climate change and ecological civilization construction while the estimation of energy consumption of buildings is an essential precondition for regional energy conservation and emission reduction. With daily temperature data of Nanchong from 1985 to 2015,its Heating Degree Day( HDD),Cooling Degree Day( CDD) and the corresponding building electricity consumption were calculated,and the relationship to air temperature were also analyzed. The results show that,in Nanchong,the average monthly HDD is max( 354. 70 DD) in January and 0 ℃·d from July to August; the average annual HDD is 1308 DD; its CDD is max( 67. 17 DD) in August,and 0 ℃·d from November to March; and the average annual CDD is 163 ℃·d. There are in-phases relationships among CDD,per unit area building consumption of cooling electricity and temperature,which are all on the rise with an increase of CDD in 2006.However,HDD presents an anti-phases relationship and a trend of decreasing that begins in 1998. The annual change of HDD is more obvious than that of CDD. It is indicated that under the global warming climate and winter warming,the consumption of heating electricity of Nanchong in winter is decreasing while that of cooling electricity in summer is increasing.