摘要
太阳能光伏光热一体化系统(hybrid photovoltaic-thermal solar system-PVT系统)作为一种利用太阳能同时获得电收益和热收益的新型能源利用方式,近年来受到学者的广泛关注。本文搭建了PVT系统电、热性能综合实验台,通过全天实验,分别研究和分析了系统的温度特性与相对电效率的关系。结果表明,在日照条件较好,系统循环水温较低的情况下,PVT系统的电效率与普通光伏电池相比可以提高约7%。同时,文章还分析了PVT系统内水的温度一天内的变化情况,提出了在午后太阳辐射强度逐渐减弱,环境温度逐渐升高时如何保持PVT系统较高电效率的方法。
A new type of energy utilization way called hybrid photovohaic - thermal solar system （PVT sys- tem）, which can convert solar energy into both power and thermal energy at the same time, becomes much more popular recently. In view of this point, a hybrid experimental system for power and thermal performance of PVT is established in this paper, the relation between temperatures and relatively power efficiency is studied experimentally. The results indicate that, the PVT system can improve the power efficiency by 7 % relatively under better condition of sun radiation and a lower temperature of circulating water. Meanwhile, the change of the water temperature in PVT system is analyzed and a method of how to keep a high level of power efficiency is proposed under a lower solar radiation and higher environmental temperature.
出处
《节能技术》
CAS
2009年第5期445-447,465,共4页
Energy Conservation Technology
