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首页> 外文期刊>International journal of green energy >Experimental investigation of a solar air heater with copper wool on the absorber plate
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Experimental investigation of a solar air heater with copper wool on the absorber plate

机译：吸收板上铜羊毛太阳能空气加热器的实验研究

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摘要

The thermal performance of a novel solar air heater was experimentally studied in this paper. For this aim, a new solar air collector was designed using copper wool on its absorber plate to be a selective surface. Hence, the area of absorber plate was enhanced to absorb much amount of heat energy. The experimental study was conducted for both cases (presence and absence of copper wool on the absorber plate) to determine the effect of copper wool on the thermal efficiency of the collector. The mass flow rate values of the study were 0.035 and 0.044 kg/s. The results pointed out that fluid temperature at outlet of collector with copper wool was increased by about 8 to14%. Therefore, these collectors may be suitable for space heating and drying of food applications. However, copper wool caused more pressure loss through the collector by 40% compared to simple case of collector. The thermal efficiency of the collectors was obtained as 34 to 83% depending on experimental variable parameters. Similarly, effective efficiency of collectors was computed to be 24 to 70%. It is found that efficiency of the collector was improved when using copper wool on the absorber plate as well as increasing mass flow rate of air.
机译：本文实验研究了新型太阳能空气加热器的热性能。为此目的，在吸收板上的铜羊毛上设计了一个新的太阳能空气收集器，以成为一种选择性表面。因此，增强了吸收器板的区域以吸收大量的热能。对两种情况进行了实验研究（吸收板上的铜丝绒），以确定铜羊毛对收集器的热效率的影响。该研究的质量流量值为0.035和0.044千克/秒。结果指出，带铜羊毛的收集器出口的流体温度升高约8至14％。因此，这些收集器可以适用于食品应用的空间加热和干燥。然而，与集电器的简单情况相比，铜羊毛通过收集器引起了40％的压力损失。根据实验变量参数，获得收集器的热效率为34至83％。同样，收集者的有效效率计算为24％至70％。发现在吸收器板上的铜羊毛以及增加空气的质量流速时，收集器的效率得到改善。

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