探究2种光电光热一体化(PV/T)系统在中国不同建筑气候带下的热电性能

THERMAL AND ELECTRICAL PERFORMANCE EVALUATION OF TWO PV/T COLLECTORS IN DIFFERENT CLIMATE ZONES IN CHINA

为考察太阳能光伏/热(PV/T)集热技术在中国各建筑气候带下的性能,利用TRNSYS软件,建立基于家用太阳能热水系统的太阳能光电光热一体化系统,分别模拟以单晶硅(Mono-cSi)和碲化镉(CdTe)薄膜为光电采集模块的PV/T集热器在中国各建筑气候带下的性能。结果表明,在中国7种建筑气候区,单晶硅型PV/T具有更高的光电转换效率,然而,CdTe薄膜型PV/T集热器的光电转换效率较为稳定;并且,同一气候区域下,CdTe薄膜型的光热转换效率较单晶硅型高约10%。综合评估后发现,CdTe薄膜型PV/T系统气候适应性更强,具有更大的实际应用潜力。

A domestic hybrid photovoltaic/thermal(PV/T)solar hot water system was studied numerical by using TRNSYS software.Two different PV/T collectors employed the monocrystalline silicon(Mono-cSi)and CdTe thin-film modules were analyzed respectively on the respects of electric and thermal performance in in different climate zones in China.Results show that in all regions,although the electric conversion efficiency of Mono-cSi PV/T is higher than CdTe thin-film type,but CdTe thin-film PV/T collector presented better volatile stability because of its lower sensibility to the ambient temperature change;Meanwhile the thermal efficiency of CdTe thin-film PV/T collector has 10%advantages than Monoc-Si type.On considering both the energy performance and manufacturing process of the two type PV/T collectors,it is concluded that CdTe thin-film PV/T collector would have more widely application for building energy conversation if the cost of fabrication can be reduced significantly.