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首页> 外文期刊>Journal of thermal analysis and calorimetry >Exergetic performance evaluation of solar air heater having V-down perforated baffles on the absorber plate
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Exergetic performance evaluation of solar air heater having V-down perforated baffles on the absorber plate

机译：在吸收板上具有V型向下穿孔挡板的太阳能空气加热器的充分性能评估

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摘要

Baffles serve as heat transfer augmentation features in solar air heaters; however, they increase pressure drop in flow channels. Perforated baffles are relatively good heat transfer augmentation features with superior performance over conventional smooth duct solar air heater and as a result find application in some solar air heaters. The exergy method is employed to in determining the roughness parameters, as second law-based exergy analysis is suitable for design of roughened solar air heaters. The exergetic efficiency of V down perforated baffled roughened duct solar air heater is studied analytically, and the results obtained compared with conventional system. Results indicate that high efficiency with optimum V down perforated baffle improves the heat absorption and dissipation potential of a solar air heater. Design plots are prepared to predict the optimum roughness parameter as a function of temperature rise parameter.
机译：挡板用作太阳能空气加热器中的传热增强部件。但是，它们会增加流道中的压降。穿孔的挡板是相对良好的传热增强特征，其性能优于传统的光滑导管太阳能空气加热器，因此在某些太阳能空气加热器中得到了应用。由于基于第二定律的本能分析适用于粗糙化的太阳能空气加热器的设计，因此采用本能方法来确定粗糙度参数。分析研究了V型降温多孔隔板风管太阳能热水器的能效，并将结果与​​常规系统进行了比较。结果表明，具有最佳的V型向下穿孔隔板的高效率可改善太阳能空气加热器的吸热和散热潜能。准备设计图以预测最佳粗糙度参数随温度升高参数的变化。

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