本文计算分析了长春市各种倾斜表面上天文辐射、直接辐射、总辐射和日照时间的方位分布和季节变化,讨论了适宜朝向,确定了最佳倾角及相应辐射量。在全年固定的南向最佳倾斜面上,直接辐射和总辐射年总量分别比水平面数值提高37%和25%;当每月固定一个最佳倾角时,分别比水平面提高49%和35%。
Orientational characteristics and seasonal variation of monthly average daily and annual sums of extraterrestrial,direct,global radiation and sunshine duration on various inclined surfaces in Changchun.Jilin Province are computed and analyzed,The good azimuthes,the Optimum inclination angles suitable for solar energy utilization and the relevant direct and global radiation on these inclined surfaces are discussed and determined. The computative results indicate that the various radiations on non-horizontal surfaces in Changchun vary remarkably with slope and orientation.The optimum inclination angles fixed annually facing south is 45癴or direct radiation and 43癴or global radiation,The annual sums of direct and global radiation on the optimum inclined surfaces are 37% and 25% more than those on horizontal surface respectively.When south-facing optimum slopes are fixed for each month,the annual sums of monthly direct and global radiation on the optimum inclined surfaces can reach 149% and 135% of those on horizontal surface respectively.
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