摘要
文章依据太阳光线在开放的浅水池内作多次反射和吸收及水对太阳辐射吸收具有选择性这一事实,建立了一个用于计算水池太阳吸收率的数学方法。分析表明:水池的太阳吸收率的精确计算必须精确地知道地面上太阳直接和散射辐射的光谱分布,而太阳辐射的光谱分布与太阳入射角及气候条件有关且任何地方无法找到这些数据。文章数字计算表明:对某一给定的水平总辐射值,用于计算的光谱分布气候模式的选择对水池的直接辐射和散射辐射吸收率有很大的影响,但对水池的太阳能收益的影响可忽略不计。文章还引入了一简化的水池吸收率的计算方法。
In this paper, a simple mathematical procedure for estimating the solar absorptance of an open water pond is presented based on the fact that the solar radiation trapped inside the pond undergoes multiplicative reflection and absorption, and on that the solar absorption of water is related to the spectral wavelength. Analysis indicates that an accurate estimation of solar absorptance of a water pond must accurately know the solar spectrums of both beam and diffuse radiation which are dependent on solar incidence angle and climatic conditions, and hence impossible to be available in any place of the world. Results by numerical calculations also show that, for a given horizontal radiation, the pattern of solar spectrum chosen for the calculations has considerable influences on both beam and diffuse solar absorptance, but has negligible effects on the solar heat gain of a water pond. A simplified method to estimate the solar absorptance of a water pond is also presented.
出处
《云南师范大学学报（自然科学版）》
2004年第5期47-53,65,共8页
Journal of Yunnan Normal University:Natural Sciences Edition
关键词
太阳吸收率
水池
Solar absorptance
water pond
