Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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The Comparison of the Total Emissivity Model for CO2 in Atmosphere

대기 중 CO2 전방사율 예측 모델 비교

  • Byun, Ki-Hong (Dept. of Mechanical Robotics and Energy Engineering, Dongguk University)
  • 변기홍 (동국대학교기계로봇에너지공학과)
  • Received : 2011.08.23
  • Accepted : 2011.10.21
  • Published : 2011.10.30
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Abstract

The effects of $CO_2$ ppm in atmosphere on the values of the total emissivity are studied. The predictions by several methods are compared. The predicted value differences between modified Kondratyev model and Hottel model are the smallest with in the range of values tested. The $CO_2$ ppm is varied from 300 ppm to 600 ppm. By Wide Band model, the total emissivity increases with increasing density-path length product rather linearly up to 0.1 g/$cm^2$. For given $CO_2$ ppm, the total emissivity increases as the air thickness increases. The same is true for both temperature and pressure increase. The temperature range tested is 220 to 300 K. Around 260K, the total emissivity is less sensitive with increasing temperature than with decreasing temperature. The pressure is varied from 0.94 to 1.06 atm. The percentage change of total emissivity with pressure change from 1atm is at most the percentage change of the pressure.

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References

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Cited by

  1. Total emissivity of CO2 near earth atmospheric condition vol.27, pp.10, 2013, https://doi.org/10.1007/s12206-013-0840-1