太阳能光伏/光热复合集热器能量转换性能的数值模拟  

Numerical simulation of energy conversion performance for hybrid photovoltaic/thermal solar collector

作　　者：刘仙萍[1,2] 饶政华[1] 廖胜明[1] 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083 [2]湖南科技大学能源与安全工程学院,湖南湘潭411201

出　　处：《中南大学学报（自然科学版）》2013年第6期2554-2560,共7页Journal of Central South University:Science and Technology

基　　金：中央高校基本科研业务费专项资金资助项目(2010QZZD0105;2010QZZD0113)

摘　　要：建立太阳能光伏/光热(PV/T)复合集热器的光电与光热耦合能量转换的数值模型,利用TRNSYS软件模拟PV/T集热器的光电、光热转换性能,分析结构参数和运行参数对PV/T集热器的能量转换性能的影响。计算结果表明:减小集热板排管的管间距与管径的比值有利于提高光热与光电转换性能;冷却流体的入口温度对PV/T集热器的性能影响显著,较低的入口流体温度有利于保持更高的光热和光电转换效率。增加冷却流体的入口质量通量可提高光热和光电效率;当入口质量通量增加至6.9 g/(s·m2)时,PV/T集热器的热、电效率分别为66.2%和10.8%,进一步增加入口质量通量对提高光热、光电效率的作用不大。A model of the photothermic-photovoltaic coupled energy conversion processes for the hybrid photovoltaic/thermal （PV/T） solar collector was developed. The performances of energy conversion in the PV/T collector were studied by using TRNSYS. The effects of structural and operating parameters on the energy conversion performance were analyzed. The numerical results show that the decrease of the ratio of the tube distance to the tube diameter is favorable to improve the electrical and thermal conversion efficiency. The inlet temperature of the working fluid is a crucial factor, and the lower inlet temperature leads to the higher electrical and thermal conversion efficiency. In addition, the higher inlet mass flux helps to increase the electrical and thermal conversion efficiency, and as the inlet mass flux is 6.9 g/（s.m2）, the corresponding thermal and electrical conversion efficiencies are 66.2% and 10.8%, respectively. To further increase the inlet mass flux has little effect on improving the electrical and thermal conversion efficiency.

关 键 词：太阳能 光伏 光热复合集热器 能量转换 数值模拟 

分 类 号：TK519[动力工程及工程热物理—热能工程]