摘要
本文根据倾斜面上太阳总辐射最佳倾角的解析表示式,利用平均太阳总辐射和直接辐射月总量以及实际地表面反射率,计算分析了我国各月最佳倾角和最佳总辐射比的时空变化特征。同时对用天空散射辐射各向同性模式计算倾斜面上总辐射日总量的适用性问题亦作了简要讨论。
In this paper, the temporal and spatial variations of the optimal tilt angle for daily total of global radiation in months are analysed based on the insolations on the horizontal surface and albedo measured from fifty-five stations with its analytical expression given before. The main results are found as following:
(1) Annual averaged errors of the optimal tilt angles are less than 1.7 and the mean errors of the global radiation amount on the tilted surfaces at the optimal tilt angles are about 0.4% for the all stations.
(2) The isotimics of the optimal tilt angles are essentially parallel to the latitude circle, however that is not true in the cloudy areas especially in Sichuan, Guizhou and Guangxi provinces, even they take south-north direction. Therefore it is necessary to take account of the effects of clouds on the optimal tilt angles when they are estimated.
(3) The isotropic model is applicable for estimating the total of global radiation falling on the surfaces tilted towards the equator.
出处
《高原气象》
CSCD
北大核心
1993年第4期409-417,共9页
Plateau Meteorology
关键词
太阳
总辐射
最佳倾角
时空分布
A surface tilted towards the equator
Optimal tilt angle
Daily total of global radiation
Temporal and spatial distribution.
