太阳能是一种取之不尽、用之不竭的能量资源,它的利用将为国民经济中动力资源的增长和人民物质生活的改善创造良好的条件。我国的西北地区、内蒙、华北平原和青藏高原,云量少,日照多,太阳辐射强度大,太阳能资源极为丰富,是利用太阳能最有前途的地区。要成功地在各个地区利用太阳能,设计和制造用于不同目的,并在经济上合算的太阳能利用器,首先需要了解各个地区可供实际利用的太阳能量。本文的目的在于以北京地区为例,计算可供太阳能利用器利用的太阳辐射能量。

This paper tends to estimate the mean values of direct solar radiationover a vertical surface as well as total solar radiation on horizontal su-rface under fine weather conditions on hourly,monthly,seaonal,andannual bases in the Beijing Region by using the observational data of so-lar radiation and sunshine record obtained at one-hour interval in Beijingfrom May 1957 to April 1967.It also gives the average time intervals andnumber of hours in terms of direct solar radiation and total solar radiationthat are available for industry in individual days each month.According tosunshine-record analysis,109.2k.cal./cm².year of direct solar radiationover a vertical surface and 89.4 k.cal./cm².year of total solar radiationon horizontal surface in a clear day may be attainable.The annual hoursof effective sunshine are 2287;while the average deviation of intra annu-al effective solar radiation is mostly less than 9%.