Experimental research of solar infrared spectral radiation in Wuhan, China

Abstract

Infrared spectral radiation accounts for about 43% of total solar radiation and is widely used in satellite remote sensing, detection, industry, and other fields. Therefore, the study of infrared solar radiation is of great significance to improve the efficiency of the use of solar energy. In this study, the radiation intensity of three infrared bands of 0.870 μm, 0.937 μm and 1.020 μm have been experimentally tested by the TBS-4 solar photometer installed in Wuhan. The data have been analyzed and the results have been incorporated into the established mathematical model for three bands under both sunny and partly cloudy weather conditions. The results show that the calculation model R2 of the three bands on sunny days is 0.963 (0.870 μm), 0.938 (0.936 μm) and 0.930 (1.020 μm), respectively. The calculation model R2 of the three bands on partly cloudy days is 0.945 (0.870 μm), 0.939 (0.936 μm) and 0.929 (1.020 μm), respectively. By analyzing the performance of the computational models under the two meteorological conditions, the computational models for sunny days are better than those for partly cloudy days. Comparing the maximum values of the three bands on partly cloudy and sunny days, the direct radiation values differ by 24.184% (0.870 μm), 15.136% (0.936 μm) and 21.862% (1.020 μm), respectively. The research results will provide an effective reference for the calculation of infrared solar radiation intensity in Wuhan.