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在对应用地表太阳辐射的系统进行热力学第二定律分析时,经常采用5个典型的太阳辐射最大转化效率计算公式。在Candau给出的辐射焰拥的定义和Gueymard公布的太阳光谱辐射数据的基础上,该文首先获得了不同大气条件和接收面下地表太阳辐射的最大转化效率(焰拥和能间比值),并将其作为基准数据,比较和分析了不同大气条件和接收面下由5个典型公式计算得到的地表太阳辐射最大转化效率的精度。结果表明由Petela、Spanner、Parrot和Jeter提出的公式的计算结果高估了地表太阳辐射的最大转化效率,而由Badescu提出的公式计算得到的结果远远低估了地表太阳辐射的最大转化效率。大气条件对地表太阳辐射最大转化效率的影响很大。在应用热力学第二定律分析太阳能转化系统时,地表太阳辐射最大转化效率的精确计算需要考虑大气条件的影响。
When analyzing the second law of thermodynamics on the surface solar radiation system, five typical formulas for calculating the maximum solar radiation conversion efficiency are often used. Based on the definition of the radiation flame given by Candau and the solar spectral radiation data published by Gueymard, the paper first obtains the maximum conversion efficiency (ratio between flame and energy) of surface solar radiation under different atmospheric conditions and receiving surface, As reference data, the accuracy of maximum conversion efficiency of surface solar radiation calculated by five typical formulas under different atmospheric conditions and receiving surfaces was compared and analyzed. The results show that the formula proposed by Petela, Spanner, Parrot, and Jeter overestimates the maximum conversion efficiency of surface solar radiation, whereas the formula calculated by Badescu far underestimates the maximum conversion efficiency of surface solar radiation. Atmospheric conditions have a great influence on the maximum conversion efficiency of surface solar radiation. When applying the second law of thermodynamics to the analysis of solar energy conversion systems, the accurate calculation of the maximum conversion efficiency of surface solar radiation needs to consider the influence of atmospheric conditions.