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首页> 外文期刊>Experimental Heat Transfer >Effect of roughness elements on thermal and thermohydraulic performance of double pass solar air heater duct having discrete multi V-shaped and staggered rib roughness on both sides of the absorber plate
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Effect of roughness elements on thermal and thermohydraulic performance of double pass solar air heater duct having discrete multi V-shaped and staggered rib roughness on both sides of the absorber plate

机译：粗糙度对吸收板两侧具有离散的多V形和交错肋粗糙度的双通道太阳能空气加热器管道的热和热工液压性能的影响

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摘要

In this work, an experimental setup consisting of a double pass solar air heater duct provided with discrete multi V-shaped and staggered rib as artificial roughness on both sides of the absorber plate has been designed and fabricated. The parameters of interest investigated experimentally cover a wide range of Reynolds number (Re) from 2000 to 20000, relative staggered rib pitch (p'/p) from 0.2 to 0.8, relative staggered rib size (r/e) from 1 to 4, and relative roughness width (W/w) from 5 to 8. Experimental data related to heat transfer, pressure loss, and thermohydraulic performance has been determined. Substantial improvement has been obtained with some penalty of friction losses.
机译：在这项工作中，设计并制造了一个实验装置，该装置由双通道太阳能空气加热器导管组成，该导管在吸收板的两侧均具有作为人工粗糙度的离散V形和交错肋，并具有离散性。实验研究的目标参数涵盖从2000到20000的雷诺数（Re）的宽范围，相对交错的肋骨节距（p'/ p）从0.2到0.8，相对交错的肋骨尺寸（r / e）从1到4，相对粗糙度宽度（W / w）为5至8。已确定了与传热，压力损失和热工液压性能有关的实验数据。已经获得了实质性的改进，但摩擦损失有所降低。

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