摘要
根据北京、攀枝花、福州、海口等地的对比观测资料，指出现用遮光环订正系数普遍偏小，不能完全反映不同地方的云天状况等，直接辐射表存在跟踪不良的现象。利用试验求得的订正系数ｆｓ与订正系数的理论值ｆｌ之差，与总云量ｎ、纬度φ和（月份—６）的绝对值Δｙｆ进行多元回归，得到回归方程：ｆｓ－ｆｌ＝０．０５３８＋０．１７１５φ／９０＋０．０１１１Δｙｆ－０．０１１７ｎ，其复相关系数ｒ高达０．９７，通过回代检验，证明由该方程计算得到的订正系数比现用系数更准确。该方程的意义在于可定量求出不同纬度不同时间的修正量，其大小与φ和Δｙｆ成正相关而与总云量ｎ成负相关，结果使得实际订正系数纬度和月份间的差距比理论值间的差距小得多，而在低纬度夏季多云的地方，修正量可能为负，即实际订正系数可能小于理论值。
In this article,according to the contrast observation data of Beijing,Panzhihua,Fuzhou and Haikou,it is shown that the current shadowbands coefficient is generally small,and can not fully reflect the sky state of different areas Further more,the pyrheliometer cant fully follow the tracks of the sun The multiple factor regression is made through the difference between the trial coefficient(f s) and the theory one(f 1),the total cloudiness(n),latitude(φ),and the absolute value of the difference between month and 6(Δy f) The obtained regression equation be shown as follows:f s-f l=0 0538+0 1715φ/90+0 0111Δy f-0 0117n,its multiple relative coefficient get high as 0 97
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
1997年第2期157-163,共7页
Acta Energiae Solaris Sinica
