New Insight to the Surface Temperature of the Sun  

作　　者：Ryszard Petela Ryszard Petela(Professor Emeritus, Calgary, Canada)

机构地区：[1]Professor Emeritus, Calgary, Canada

出　　处：《Energy and Power Engineering》2024年第8期285-292,共8页能源与动力工程（英文）

摘　　要：Information is given on thermal radiation from the Sun, considered in practical engineering calculations of heat exchange. It was found that although the surface temperature of the Sun is assumed to be about 5800 K, the solar spectrum data measured by Kondratyev lead to a value of at least 7134 K. Such a higher value can be obtained by interpreting the Planck formula for the black radiation spectrum for the Kondratyev data. In addition, using the Stefan-Boltzmann law, the energetic emissivity of the Sun’s surface was determined to be 0.431. Furthermore, based on Petela’s formulae for exergy of thermal radiation, the exergetic emissivity of the Sun’s surface was also calculated at the level of 0.426.Information is given on thermal radiation from the Sun, considered in practical engineering calculations of heat exchange. It was found that although the surface temperature of the Sun is assumed to be about 5800 K, the solar spectrum data measured by Kondratyev lead to a value of at least 7134 K. Such a higher value can be obtained by interpreting the Planck formula for the black radiation spectrum for the Kondratyev data. In addition, using the Stefan-Boltzmann law, the energetic emissivity of the Sun’s surface was determined to be 0.431. Furthermore, based on Petela’s formulae for exergy of thermal radiation, the exergetic emissivity of the Sun’s surface was also calculated at the level of 0.426.

关 键 词：Thermal Radiation Radiation Temperature Surface Temperature Surface Emissivity Sun Radiation Spectrum Plank Law Exergy of Radiation Photosphere 

分 类 号：F41[经济管理—产业经济]