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我国太阳能资源十分丰富,全国有2/3以上的地区,年辐射总量大于120万千卡/米~2,年日照时数在2000小时以上。其分布趋势有五个特点: 1.太阳能资源的高值中心和低值中心都处在北纬22°～35°区域内。青藏高原是太阳能的高值中心,由于青藏高原南部是海拔7000～8000米的喜马拉雅山,阻挡着南来的印度洋水汽,因而年日照高达3200～3300小时,年辐射总量为160～200万千卡/米~2,四川盆地由于处在青藏高原东麓的背风坡,是南北两股气流高原的南支暖湿气流和北支冷干气流交接处,所以云雨天气多,形成太阳能资源的低值中心;
China is rich in solar energy resources. There are more than two-thirds of the country’s total solar radiation. The total annual radiation output is more than 1.2 million kcal / m 2, and the number of sunshine hours is above 2000 hours. There are five characteristics of its distribution trend: 1. The high and low value centers of solar energy resources are all within the range of 22 ° ~ 35 ° N. The Tibetan Plateau is the center of high solar energy. Since the Himalayas at the altitude of 7000-8000 meters in the southern part of the Qinghai-Tibet Plateau block the moisture of the Indian Ocean in the south, the annual sunshine amount to 3200-3300 hours and the annual radiation amount is 160-2 million 2. Due to the leeward slope at the eastern foot of the Qinghai-Tibet Plateau, the Sichuan Basin is the junction of the southern branch warm and wet airflow and the northern branch cold and dry junction of the two northern and southern mainstreams. As a result, there are many cloud-rain days and low solar energy resources Value center