Maharana Debasis, Bhattacharya Tulika, Kotecha Prakash, Anandalakshmi Ramalingam
Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, India.
Department of Chemical Engineering, National Institute of Technology Durgapur, Durgapur, 713209, India.
Environ Sci Pollut Res Int. 2022 Aug;29(37):56473-56489. doi: 10.1007/s11356-021-18070-5. Epub 2022 Mar 26.
In this paper, an exergetic optimization of simple and finned flat plate solar air collectors is established to determine the optimal design and operational parameters for humid subtropical climatic conditions. Solar air collectors are commonly used for space heating, irrigation, greenhouses, grain drying, hot air generation, etc. A detailed solar energy radiation model is developed for solar energy conversion. A comprehensive optical, energy, and exergy analysis is carried out for evaluating the performance, energy and exergetic efficiency for simple and finned flat plate solar air collectors under humid subtropical climatic conditions. A simulation program is developed for solar energy model, energy and exergetic calculations. The following geometric and operating parameters are considered as decision variables: absorber plate area, dimensions of simple and finned solar collectors, fluid inlet and outlet temperatures, average velocity, overall loss coefficient, glass cover temperatures, plate temperature, and useful heat gain. The proposed model is optimized using computational intelligence technique (single phase multi-group teaching learning optimization) for maximum mean exergy efficiency in simple and finned solar air collectors for humid subtropical regions. The maximum exergy efficiency is achieved in the case of finned solar air collectors with a yearly optimal average exergy efficiency of 6.10% for a collector area of 5 m and a yearly average heat flux of 601 W/m. Thus, beneficial applications of exergetic optimization in design and operation of solar collectors for humid subtropical climatic conditions based on maximum exergy efficiency according to the optimized parameters and benefits of this approach for such systems have been highlighted.
本文对简单平板和带翅片平板太阳能空气集热器进行了分析优化，以确定适合湿润亚热带气候条件的最优设计和运行参数。太阳能空气集热器通常用于空间供暖、灌溉、温室、谷物干燥、热风产生等。开发了一个详细的太阳能辐射模型用于太阳能转换。对简单平板和带翅片平板太阳能空气集热器在湿润亚热带气候条件下的性能、能量和效率进行了全面的光学、能量和分析。为太阳能模型、能量和计算开发了一个模拟程序。以下几何和运行参数被视为决策变量：吸收板面积、简单平板和带翅片太阳能集热器的尺寸、流体进出口温度、平均流速、总损失系数、玻璃盖板温度、板温以及有用热增益。使用计算智能技术（单相多群体教学学习优化）对所提出的模型进行优化，以实现湿润亚热带地区简单平板和带翅片太阳能空气集热器的最大平均效率。对于面积为5平方米、年平均热流为601瓦/平方米的带翅片太阳能空气集热器，实现了最大效率，其年最优平均效率为6.10%。因此，强调了基于最大效率对湿润亚热带气候条件下太阳能集热器进行分析优化在设计和运行中的有益应用，并根据优化参数突出了这种方法对此类系统的益处。
