An experimental investigation of a novel V-groove absorber plate with pin-fins on double-pass solar air collector was made to study the enhancement of thermal performance. The objective of this work is to develop a solar air collector for drying agricultural products with enhanced heat transfer rate by employing pin-fins on V-groove absorber plate under varied configurations. The parameters that influence the instantaneous thermal efficiency of the collector are discussed, and obtained results are compared with a conventional V-groove absorber plate for same mass flow rate values. Energy and exergy analyses were also carried out. The results show that the efficiency of the collector depends strongly on the flow rate. Also, it is noted that for a flow rate of 0.035 kg s⁻¹, the novel V-groove absorber plate with pin-fins installed on both sides exhibits extended heat transfer area, thereby a rise in average thermal efficiency by 17.4%.

中文翻译：

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一种新型的带有销钉的V型槽吸收板用于干燥农产品的太阳能集热器的热性能增强：一项实验研究

为了研究热性能的提高，对新型双通道太阳能空气收集器上带有销钉的V型槽吸收板进行了实验研究。这项工作的目的是开发一种太阳能空气收集器，该干燥器通过在V形槽吸收板上采用多种构造的针状翅片来干燥具有较高传热速率的农产品。讨论了影响集热器瞬时热效率的参数，并将获得的结果与相同质量流量值下的常规V型槽吸收板进行了比较。还进行了能量和火用分析。结果表明，收集器的效率在很大程度上取决于流速。另外，应注意的是，对于0.035kg s ^-1的流量，新颖的V型槽吸收板在两侧都安装了翅片，因此传热面积扩大，平均热效率提高了17.4％。