The seasonal

monthly and daily changes of solar radiation in Nanchang are analyzed by using the data monitored by the solar monitoring system. The results show that the maximum annual mean of total direct solar radiation intensity in summer

autumn and winter in Nanchang is 1 026 W/m2. The sunshine time in winter is very short due to the influence of rainy and cloudy weather in this area; compared with the solar radiation in sunny weather

the total solar radiation intensity in winter is not significantly different from that in summer. However

the total direct radiation in winter is still lower than that in summer due to the fact that the whole day sunshine time in winter is lower than that in summer. By analyzing the frequency distribution of total solar radiation intensity in Nanchang

it can be seen that over 100 W/m2 of direct solar radiation intensity accounts for 59.31% of total solar radiation intensity

and the distribution is relatively stable.