鏡面反射及び吸収を考慮した複層ガラス窓の非灰色ふく射・伝導複合伝熱解析(熱工学,内燃機関,動力など)

概要

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Combined nongray radiative and conductive heat transfer in multiple glazing subjected to solar irradiation is analyzed. A spectral solar model proposed by Bird et al. is used to calculate direct and diffuse solar irradiance. The radiation element method by ray emission model, REM_2, is used to analyze spectral radiative heat transfer. Specular reflection at boundary surfaces is taken into account. Spectral dependence of radiation properties of glass such as specular reflectivity, refraction angle, and absorption coefficient is taken into account. Steady-state temperature and heat flux distributions in glass layer are obtained and insulating efficiency of multiple glazing is examined. Overall heat transfer coefficients predicted by the present method are compared with those based on the JIS method. The values obtained by the present method are slightly smaller than those obtained by the JIS method. To investigate the spectral variation of radiative heat flux attenuated during glass layer, spectral heat flux at room side surface and incident radiation are compared.
2002-12-25