管板式PV/T组件结构参数优化

Optimization of Structural Parameters of Tube-sheet PV/T Collector

以无玻璃盖板管板式PV/T组件为研究对象,采用Trnsys软件仿真与实验测试相结合的方法,从发电角度确定吸热板厚度、换热管数量及换热管管径;从成本角度提出适用于不同效率组件、不同光资源区域工况下的最佳设计参数。结果表明:换热管管间距、吸热板厚度和换热管内径对管板式PV/T组件发电性能的影响程度依次减小;以实现PV/T发电性能不低于传统PV组件为目标,换热器结构参数建议为吸热板厚度0.4 mm、换热管管径6 mm及换热管管间距不大于99.2 mm;以全生命周期内总投入最低为目标,Ⅱ类光资源地区最佳管间距为70.86 mm,Ⅲ类和Ⅳ类光资源地区的最佳管间距为82.67 mm;优化后PV/T组件的太阳能利用率达到42.75%~48.69%,发电效率比传统PV高1.17%~2.08%。

Selecting unglazed PV/T module as research object,numerical simulation by Trnsys software and experimental test were combined.The heat absorption plate thickness and heat exchange tube quantity and diameter were determined from the perspective of power generation;the optimal design parameters suitable for modules with different efficiencies and regions with different solar resources were proposed from the perspective of cost.The results show that the electricity generation performance of tube-sheet PV/T collector is in descending order influenced by heat exchange tube spacing,heat absorption plate thickness,and inner diameter of heat exchange tube.To achieve the goal that PV/T power generation efficiency is no less than that of traditional PV module,the recommended structural parameters of heat exchanger are as follows:thickness of absorbing plate is 0.4 mm,heat exchange tube diameter is 6 mm and tube spacing is no more than 99.2 mm.To minimize the total investment of tube-sheet PV/T module in the whole lifecycle,the suggested optimal tube spacing is 70.86 mm in class II solar resource areas,and 82.67 mm in class III and class IV solar resource areas.The solar energy utilization rate of optimized PV/T module reaches 42.75% to 48.69%,meanwhile,the power generation efficiency is 1.17% to 2.08% higher than that of traditional PV module.