| Low-E玻璃U值及其影响因素的计算分析 |
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| 引用本文： | 李会平,胡斌.Low-E玻璃U值及其影响因素的计算分析[J].玻璃与搪瓷,2010,38(1):7-13. |
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| 作者姓名： | 李会平 胡斌 |
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| 作者单位： | 华东理工大学无机材料系,上海,200237 |
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| 摘 要： | 应用传热学原理,分析了Low-E玻璃构件传热基本过程,给出了总传热系数U值计算的详细表达式,并在计算机上进行了数值计算,研究了各种参数对U值的影响。计算结果表明:玻璃厚度对U值影响不明显;影响U值的主要因素是气体间隔层厚度和玻璃的辐射率;随着气体间隔层厚度增加,U值逐渐降低,达最低值后缓慢上升,有一个最佳的厚度;随着辐射率降低,U值逐渐降低,但U值与辐射率并不呈现简单的线性关系,对给定的Low-E玻璃构件,有一个极限U值。
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| 关 键 词： | Low-E玻璃 U值 传热 节能 数值计算 |
Calculation and Analysis of U Value for Low-E Glass Units |
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| LI Hui-ping,HU Bin.Calculation and Analysis of U Value for Low-E Glass Units[J].Glass & Enamel,2010,38(1):7-13. |
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| Authors: | LI Hui-ping HU Bin |
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| Affiliation: | Department of Inorganic Materials;East China University of Science and Technology;Shanghai 200237;China |
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| Abstract: | Heat transfer processes through a Low-E glass unit were analyzed and a set of mathematical equations for overall heat transfer coefficient,i.e.U value was established.U value was then calculated by a computer.The influences of glass thickness,gas gap between two glass sheets,type of filling gas,and the emissivity of Low-E glass coating on U value have been studied.Calculated results show that U value is not sensitive to glass thickness.The gas gap between two glass sheets and the emissivity of Low-E glass c... |
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| Keywords: | Low-E glass U value heat transfer energy efficiency numerical calculation |
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