Department of Mechanical Engineering, Cambridge Institute of Technology, Ranchi, Jharkhand, India.
Department of Electrical and Electronics Engineering, Cambridge Institute of Technology, Ranchi, Jharkhand, India.
Environ Sci Pollut Res Int. 2023 Apr;30(19):54429-54447. doi: 10.1007/s11356-023-26360-3. Epub 2023 Mar 25.
The objective of this research article is to present a comprehensive review of the work carried out to improve the thermal as well exergetic performance of the conventional smooth absorber plate solar air heater (SAH) duct by the use of the various configurations and arrangements of extended surfaces (fins) for the forced convection. In the SAH duct, these extended surfaces are attached along the air-flow path on the top absorber, on the bottom plate, or on the both plate surfaces. It enhances the performance of the conventional SAH by increasing the surface area and makes flow turbulent by their presence. Several experimental, theoretical, and simulation works, which have been performed by the researchers by utilizing the extended surfaces to improve the thermal efficiency based on first law of thermodynamics, exergy, and entropy generation analysis on the basis of the second law of thermodynamics for SAH ducts, have been included in the present article. Subsequently, an effort has been made to calculate the Nusselt number and friction factor by using the correlations reported by the researchers for comparing the performance of different configurations of fin SAHs. This comprehensive review article will be useful for the investigators and researchers who are working in the area of extended surface SAHs.
本文的目的是全面回顾为提高传统光滑吸收板太阳能空气加热器（SAH）风道的热性能和（火用）性能而进行的工作，方法是在强制对流过程中使用各种配置和扩展表面（翅片）布置。在 SAH 风道中，这些扩展表面沿着顶吸收器、底板或两个板表面上的气流路径附着。通过增加表面积并通过其存在使流动变得湍流，从而提高了传统 SAH 的性能。本研究中包括了一些实验、理论和模拟工作，这些工作是由研究人员利用扩展表面进行的，以根据热力学第二定律的熵产生分析和（火用），基于热力学第一定律来提高热效率，对 SAH 风道进行了研究。随后，通过使用研究人员报告的关联来努力计算努塞尔数和摩擦系数，以比较不同翅片 SAH 配置的性能。本文综述对从事扩展表面 SAH 研究的研究人员和研究人员将是有用的。
