太阳直射光谱辐射火用分析

利用Gueymard给出的太阳光谱数据和Candau提出的光谱辐射火用强度的定义计算地表直射太阳辐射的积分辐射火用流，分析地表直射太阳辐射的光谱辐射温度、光谱辐射火用和光谱能质因子随波长的分布，讨论大气条件如可凝结水量和空气质量对地表直射太阳积分辐射火用流的影响。结果表明，在近紫外线、可见光以及近红外区域，0.76~1.343 mm波长范围内的地表直射太阳光谱能质因子和积分辐射火用流的增量比在其他波长范围内的大。对于地表直射太阳辐射的多光谱利用，需要着重考虑近紫外线、可见光以及0.76~1.343 mm波长范围内的太阳辐射。地表直射太阳积分辐射火用流分别随着可凝结水量和空气质量的增加而减小。空气质量对地表直射太阳积分辐射火用流的影响较大。

Analysis on Direct Solar Spectral Radiation Exergy

The solar spectral radiation databank developed by Gueymard and the definition of spectral radiative exergy intensity proposed by Candau were adopted to compute the integrated radiation exergy flux of direct terrestrial solar radiation. Distributions of direct terrestrial solar spectral radiation temperature, spectral radiative exergy, and spectral energy factor with wavelength were analyzed. Effects of atmosphere condition, such as precipitable water and air mass, on the direct terrestrial solar integrated radiation exergy flux were discussed. The results show that the spectral energy factor and the increment of integrated exergy flux of direct terrestrial solar radiation in the near ultraviolet, visible light and near infrared within the spectrum region 0.76~1.343 μm are larger than those in other spectrum regions. The solar radiation within the spectrum region near ultraviolet, visible light and near infrared from 0.76 to 1.343 μm should be taken into account for the utilization of multi-spectrum of direct terrestrial solar radiation. The direct terrestrial solar integrated radiation exergy flux decrease with the increase of precipitable water and air mass, respectively. And the effect of air mass on the direct terrestrial solar integrated radiation exergy flux is the larger.