小型菲涅尔式CPV/T集热器光热特性研究

为充分利用建筑屋顶,解决光伏光热一体化(PV/T)集热器光电转换效率的高温减益问题,并提高太阳能综合利用率和集热品位,文章构建了一种基于太阳光谱分频利用技术的光伏/光热模块分离式的小型聚光式PV/T集热器。通过建立其光/电/热理论分析模型及TracePro/Fluent数值仿真模型,以南京地区气象数据为例,综合分析其光/电/热性能,结果表明:该集热器以与安装地纬度等值的倾角南北轴向放置时,其年均光学效率为64.97%,工质出口温度为90℃时的系统光电/光热效率分别为12.47%,40.09%,系统综合热效率达72.91%,且其结构简单、外形轻薄,有望实现与普通建筑的有效结合。

Optical and thermal performance analysis of a miniature Fresnel CPV/T collector

In order to make full use of the building roof space, decrease the photoelectric conversion efficiency degeneration in the hybrid photovoltaic/thermal(PV/T) collector due to high temperature, and improve the comprehensive utilization efficiency of solar energy and the grade of the collected heat, a miniature concentrating PV/T collector with a separate arrangement of photovoltaic/thermal modules based on solar spectrum frequency division utilization technology was constructed in this paper. Based on the optical/electrical/thermal theoretical analysis models and TracePro/Fluent numerical simulation models, the optical/electrical/thermal performances were analyzed with taking the meteorological data of Nanjing area as an example. The results show that when the collector is placed on the north-south axis with the same tilt angle as the latitude of the installation place, its annual average optical efficiency is 64.97%, the photoelectric/thermal efficiencies of the system are 12.47% and 40.09% respectively and the comprehensive thermal efficiency is 72.91% when the outlet temperature of the working fluid is 90 ℃, and combining the simple structure and thin profile of the collector is expected to be effectively integrated with common buildings.