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首页> 外文会议>Energy and Environment Technology, 2009. ICEET '09 >Numerical Simulation Investigation on the Optimum Air Layer Spacing between Absorber and Glass Cover in Flat Plate Solar Collectors with Small Convective Heat Loss
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Numerical Simulation Investigation on the Optimum Air Layer Spacing between Absorber and Glass Cover in Flat Plate Solar Collectors with Small Convective Heat Loss

机译：小对流热损失平板太阳能集热器与玻璃罩最佳空气层间距的数值模拟研究。

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摘要

In this paper, Fluent is applied to predict the convective heat loss of the air cavity between absorber and glass cover of flat plate solar collector. Two-dimensional numerical models generally performed poorly to predict the heat transfer results at α¿70° due to the intrinsic three-dimensional nature of the flow, three-dimensional modeling is applied and found to predict well the average heat transfer quantities. Results of the three-dimensional numerical simulation has been compared with literature ones, and they give a reliable agreements. The optimum air layer spacing of flat-plate solar collector was simulated with three-dimensional model and has got the result of about 50mm at inclination of 0°, 30° and 45°and 20mm at perpendicular case.
机译：本文利用Fluent来预测平板太阳能集热器与玻璃罩之间的空气对流热损失。由于流动的固有三维特性，二维数值模型通常不能很好地预测70°α处的传热结果，因此采用了三维建模并发现可以很好地预测平均传热量。三维数值模拟的结果已与文献进行了比较，并给出了可靠的协议。利用三维模型对平板太阳能集热器的最佳空气层间距进行了仿真，得出了0°，30°，45°倾斜时约为50mm，垂直情况下为20mm的结果。

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