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Heat transfer through a double-glazed unit with an internal louvered blind: Determination of the thermal transmittance using a biquadratic equation

机译:通过带有内部百叶窗百叶窗的双层玻璃单元的传热:使用二次方程式确定传热率

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摘要

The aim of this research is to quantify the influence of a louvered blind in a double-glazed unit during night-time conditions. First, an analytical study of free convection was conducted to obtain a set of correlations for the Nusselt numbers of the cavity. Second, a parametric study was performed to calculate the total heat transfer (convective and long-wave radiative) during night-time conditions. The analysis accounted for aspect ratio, blind thermal conductivity, surface emissivity and slat angle. Using these data, a biquadratic equation was developed to calculate the U-factor of a double-glazed unit with an internal louvered blind in terms of the U-factor of the unit without the blind, slat surface emissivity and slat angle.
机译:这项研究的目的是量化夜间条件下双层玻璃窗中百叶窗百叶窗的影响。首先,对自由对流进行了分析研究,以获得腔的努塞尔数的一组相关性。其次,进行了参数研究,以计算夜间条件下的总传热(对流和长波辐射)。分析考虑了纵横比,盲孔导热率,表面发射率和板条角度。利用这些数据,开发了一个二次方程式,以计算带有内部百叶窗式百叶窗的双层玻璃单元的U因子,根据没有盲孔的单元的U因子,板条表面发射率和板条角度来计算。

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