白银市太阳能资源评估

利用我国西北地区及白银市气象站的辐射、日照资料,分析了区域内近50a的太阳能资源状况.结果表明：白银市年总辐射量5 530～5 900MJ/m2,略少于甘肃河西地区.月总辐射量最大值出现在6月,最小值出现在12月;年生理辐射总量2 473～2 874MJ/m2,生理辐射丰富.一般在33 000kg/hm2以上,而光能利用率较低,一般在0.4%左右;白银市年总辐射以120 MJ/（m2.10a）的速率递减,明显高于西北地区的平均水平;全年日照总时数2 350～2 800h,自南向北增多,5～8月日照时数最多,9月最少.日照时数和日照百分率的变化趋势不明显;白银市光能资源较丰富,属于太阳能发电较适宜的地区.

Assessment of Solar Energy Resources in Baiyin City

Using the data of solar radiation of 28 observational stations and sunshine duration of 136 observation stations in the period of 1961 to 2007 in northwest China,we analyzed the conditions of solar energy resources in Baiyin city for 50 years.The main conclusions are as follows：Baiyin＇s yearly total radiation is 5 530~5 900 MJ/m2,which is slightly less than that of West Gansu but higher than that of East Gansu.The maximum value of monthly total radiation appears in June,the minimum value appears in December.Yearly physiologic radiation quantity is 2 473~2 874 MJ/m2.For the agricultural production,the physiologic radiation is quite rich.The potential for photosynthetic production is great,generally above 33 000 kg/hm2,but the use of solar energy is poor,generally about 0.4%.The yearly solar energy of Baiyin decreases by 120 MJ/（m2·10 a）.Its whole year sunshine duration is 2 350~2 800 h.It increases from south to north.The sunshine hours are longest in May to August,but least in September.The sunshine change is not obvious.The solar energy resources in Baiyin city are quite rich and suitable for the solar energy electricity generation.