新型集热结构的PV/T组件冷却模拟研究

Research on Cooling Simulation of PV/T Module with New Collector Structure

针对光伏模块冷却方式设计了一种新型集热结构的PV/T组件。基于Fluent软件运用数值模拟方法比较新型集热结构中不同凸包间距、高度对新型冷却板的影响,同时在相同条件下将该结构与扁盒式冷却板进行了比较。从4种模型中选择凸包直径15 mm、凸包间距15 mm、凸包高度为15 mm作为最佳模型,此时背板平均温度为295.31 K,出口截面平均温度为293.41 K,冷却背板热效率为0.9;相同条件下将该模型与扁盒式冷却板比较,新型集热结构模型背板温度减少了6.5 K,出口温度增加了0.99 K,集热效率增加了0.26,摩擦因子、热工水力性能参数、努塞尔数、表面传热系数等几个热性能参数有较大的提升。

A new type of PV/T system with collector structure is designed for the cooling mode of PV modules.Based on Fluent software,numerical simulation method is used to compare the influence of different convex hull spacing and height on the new type cooling plate in the new collector structure.The structure is compared with the flat box cooling plate under the same conditions.From the four models,the convex hull diameter of 15 mm,the convex hull spacing of 15 mm and the convex hull height of 15 mm are selected as the best model.At this time,the average temperature of the back plate is 295.31 K,the average temperature of the outlet section is 293.41 K,and the thermal efficiency of the cooling back plate is 0.9.Under the same conditions,compared with the flat box cooling plate,the back plate temperature of the new model is reduced by 6.5 K,the outlet temperature is increased by 0.99 K,and the heat collection efficiency is increased by 0.26.The thermal performance parameters,such as friction factor,thermal-hydraulic performance parameters,Nussel number and surface heat transfer coefficient,are greatly improved.