各种天气状况下太阳辐射照度与太阳光照度关系

以同济大学自建的小型气象台站测得的2009—2011年气象数据为基础,采用回归分析的方法分析了晴空指数、太阳高度角对太阳辐射照度与光照度关系的影响,发现它们对太阳辐射照度的影响整体上呈现非线性,且影响规律在各分区间内略微不同.因此,采用分段线性拟合的方法将晴空指数和太阳高度角分为9个区间,分别建立对应的太阳辐射照度与太阳光照度之间的线性拟合关系,并通过实测数据证明这种处理方式具有较高精度.结论适用于纬度和天气条件与上海相似的地区.

Relationship Between Bolar Radiance And Solar Illuminance Under All Sky Types

Based on the meteorological data measured at a small meteorological station set up in Tongji University from 2009 to 2011, an analysis was made of the effects clearness index and solar altitude on the relationship between solar radiance and illuminance. It is found that the effects were nonlinear on the whole interval, and there was a slight difference at different intervals. Therefore, the piecewise linear fitting method was employed. The clearness index and solar altitude angle were divided into 9 intervals, and the linear fitting relationship between solar radiation and solar illuminance was established correspondingly. The measured data show that the method is of a higher accuracy, which is suitable for areas which have similar latitude and weather condition as Shanghai.