翅片型中置式光伏Trombe墙性能的数值模拟  

Numerical Simulation on Performance of Finned-Built-Middle Photovoltaic Trombe Wall

作　　者：肖兰[1,2] 张雨晴 吴双应[1,2] 徐世杰 XIAO Lan;ZHANG Yuqing;WU Shuangying;XU Shijie(Key Laboratory of Low-grade Energy Utilization Technologies and Systems(Chongqing University),Ministry of Education of China,Chongqing400044,China;School of Energy and Power Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学低品位能源利用技术及系统教育部重点实验室,重庆400044 [2]重庆大学能源与动力工程学院,重庆400044

出　　处：《工程热物理学报》2024年第7期1917-1923,共7页Journal of Engineering Thermophysics

基　　金：重庆市技术创新与应用发展专项项目(No.cstc2019jscx-msxmX0213);中央高校基本科研业务经费项目(No.2018CDXYDL0001)。

摘　　要：提出一种带有竖直翅片的中置式光伏Trombe墙,基于热力学第一和第二定律,数值研究翅片间距和高度对其性能的影响,并与无翅片的中置式光伏Trombe墙进行性能对比。结果表明:在一定的翅片间距和翅片高度范围内,热效率可以得到有效提高;减小翅片间距和增大翅片高度能够提升电效率。引入综合效率计算发现,相比于热能,获得的电能在整体能效中占主导地位。在较大的翅片高度下,存在最佳翅片间距使综合效率最大化,且翅片高度的增大提升了系统的综合效率。翅片型中置式光伏Trombe墙在翅片间距和高度分别为15.625 mm和45 mm时的综合效率达到了12.74%,相对于无翅片的系统提高了11.29%,具有很大的应用潜力。A novel built-middle photovoltaic Trombe wall with vertical fins was proposed in this study.Based on the first and second laws of thermodynamics,the effects of fins spacing and height on the performance were numerically investigated,and the performance was compared with that of the built-middle photovoltaic Trombe wall without fins.The results show that the thermal efficiency can be effectively improved within a certain range of fins spacing and fin height.Decreasing the fins spacing and increasing the fins height can enhance the electrical efficiency.By introducing the overall exergy efficiency,it is found that the obtained electrical energy dominates the overall exergy efficiency compared to thermal energy.There exists the optimal fins spacing to maximize the overall exergy efficiency under higher fins,and increasing fins height can enhance the overall exergy efficiency of the system.The finned-built-middle photovoltaic Trombe wall has the overall exergy efficiency of12.74%at 15.625 mm of fins spacing and 45 mm of fins height,which is an improvement of 11.29%compared to the system without fins,and has a great potential for application.

关 键 词：翅片 中置式光伏Trombe墙 自然对流 性能评价 

分 类 号：TK121[动力工程及工程热物理—工程热物理]