昆明地区太阳能集热器采光量的计算

Calculation of anniversary solar energy absorption of collector in Kunming area

基于Perez辐射模型,借助瞬态系统模拟程序(TRNSYS)软件,根据Meteonorm提供的典型气象年数据,采用逐时累积方法计算不同倾角及方位角的集热器单位面积采光量。在昆明地区,正南向集热器年采光量最大的倾角为20°,在该角度±20°范围内,其年辐射量变化不超过5%;随着倾角的增大或减小,其年辐射量的变化将会增大,当集热器倾角从70°增大到90°时,年辐射量减少20.8%。方位角对集热器采光量影响不大,方位角在±20°以内的集热器年采光量变化不超过1%;随着方位角的增大,采光量随倾角的变化而增大,当方位角从70°增大到90°时,集热器采光量减少3.3%。

Based on Perez radiation model, using TRNSYS software, solar energy absorptions of collector unit area are calculated respectively at different tih angles and different azimuths by using the method of hourly accumulating from typical meteorological year data. In Kunming area, an orienting south collector that tilts at an angle of 20° will capture the maximum solar energy, at a range of the tilt angle ±20 °, anniversary absorbed solar energy of collector varies less than 5%, and its variation will rise with tilt angle increase or decrease, the anniversary absorbed energy will lose 20.8% when tilt angle is from 70° to 90°. Azimuth affects the anniversary absorbed solar energy a little. The anniversary absorbed energy varies less than 1% when the azimuth changes around ±20 °, its variation increases with the azimuth increase. The anniversary absorbed energy reduces 3.3% when the azimuth increases from 70 ° to 90 °.