Combined nongray radiative and conductive heat transfer in multiple glazing taking into account specular reflection and absorption

Shigenao Maruyama, Yusuke Mori, Chie Chikira, Seigo Sakai

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The problem of combined nongray radiative and conductive heat transfer in multiple glazing subjected to solar irradiation is analyzed. A spectral solar model proposed by Bird and Riordan is used to calculate direct and diffuse solar irradiance. The radiation element method by ray emission model, REM2, is used to analyze the spectral dependence of radiative heat transfer. Specular reflection at boundary surfaces is taken into account. The spectral dependence of radiation properties of glass such as specular reflectivity, refraction angle, and absorption coefficient is taken into account. The steady-state temperature and heat flux distributions in the glass layer are obtained and the insulating efficiency of multiple glazing is examined. The 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 lower than those obtained by the JIS method. To investigate the spectral variation of radiative heat flux attenuated in the glass layer, the spectral heat flux at the room-side surface and incident radiation are compared.

Original languageEnglish
Pages (from-to)712-726
Number of pages15
JournalHeat Transfer - Asian Research
Volume32
Issue number8
DOIs
Publication statusPublished - 2003 Dec 1

Keywords

  • Glass
  • Heat conduction
  • Multiple glazing
  • Nongray
  • Numerical analysis
  • Solar irradiation
  • Specular reflection
  • Thermal radiation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

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