流量对光伏热水器热电性能的影响  

The impact of flow rate on the thermoelectric performance of photovoltaic/thermal water heater

作　　者：杨爱新[1] YANG Aixin(School of Mechanical and Electrical Engineering,Jinan Engineering Polytechnic,Ji'nan 250200,China)

机构地区：[1]济南工程职业技术学院机电工程学院,山东济南250200

出　　处：《邵阳学院学报(自然科学版)》2024年第6期60-67,共8页Journal of Shaoyang University:Natural Science Edition

基　　金：山东省教育发展研究微课题(FC068);济南工程职业技术学院重点科研项目(GHK21J01)。

摘　　要：通过数值模拟的方法探讨了光伏(photovoltaic/thermal,PV/T)热水器的传热机制,旨在提高系统的光电与光热效率。研究发现,随着水流量增加,系统的光电、光热与综合效率均有所提高,同时热损系数逐渐减小。在温度分布方面,水流量增加能显著降低PV/T模块温度,尤其在集热管附近,水流量增加导致温度分布更为均匀。基于最小二乘法得到了不同水流量下的PV/T模块的温度分布函数。This study utilized numerical simulations to examine the heat transfer mechanism of photovoltaic/thermal(PV/T)water heaters,aiming to enhance their photovoltaic and photothermal efficiencies.It was found that as the water flow rate increases,there is a corresponding improvement in the system's photovoltaic,photothermal,and overall efficiencies,along with a gradual reduction in the heat loss coefficient.In terms of temperature distribution,increased water movement significantly lowers the temperature of the PV/T module,particularly around the heat collector tube,which results in a more uniform temperature distribution.A temperature distribution function for the PV/T module at different water flow rates was obtained based on the least squares method.

关 键 词：光伏热水器 效率 热损系数 温度分布 

分 类 号：TK513[动力工程及工程热物理—热能工程]