杭州太阳能资源变化特征及评估

通过对1981-2010年杭州太阳总辐射和日照时数资料统计分析,结果表明:杭州太阳总辐射近30 a呈现上升趋势,春季太阳总辐射上升趋势最为显著;月太阳总辐射呈双峰型变化,7月最高、1月最低。日照时数近30 a呈现下降趋势,夏季和冬季日照时数下降趋势显著,夏季日照时数最高,冬季最低,春秋两季日照时数差异不大,月日照时数7月最高、2月最低。对杭州太阳能资源进行分析评估,结果表明,近30 a杭州太阳总辐射年平均值4196.41 MJ/m2.a,属于太阳能资源较丰富区;太阳能资源稳定程度指标为4.5,属于太阳能资源不稳定区域。

Characteristics and Assessment of Solar Energy Resources Variation in Hangzhou

The global solar radiation and sunshine hours data in Hangzhou from 1981 to 2010 are used in this study,Results show that the global solar radiation was increased in recent 30a in Hangzhou and has a significantly increasing trend in spring.The maximum value of global solar radiation is in summer and the minimum value is in winter.The monthly global solar radiation shows a double-peaked mode with highest value in July and lowest value in January.The sunshine hours was decreased in recent 30a in Hangzhou and has a significantly decreasing trend in both summer and winter.The maximum sunshine hours is in summer and minimum in winter.That in spring is almost the same as in autumn.The monthly sunshine hours is the highest in July and lowest in February.Solar energy resources results show that the average value of global solar radiation in Hangzhou in recent 30 a is 4196.41 MJ/m2·a.It belongs to abundant solar energy resources area.The stability of solar energy resources in Hangzhou is 4.5.It belongs to unstable solar energy resources area.