商场冷凝水耦合光伏/光热系统的应用分析

太阳能光伏光热(solar photovoltaic-thermal, PV/T)技术将光伏和光热结合，可实现产电效率的提高和低品位热源的综合利用。基于商场空调冷凝水的实时回收量，本文研究建立了冷凝水水冷式PV/T系统，研究了该系统的性能和环境效益。在确定商场的空调冷凝水的逐时水量的基础上，将冷凝水水冷式PV/T系统与单一光伏(photovoltaic, PV)系统的性能进行对比分析。结果表明，冷凝水水冷式PV/T系统通过收集制冷季商场内空调产生的大量冷凝水作为冷却介质，降低了光伏电池板的温度，典型日的光伏效率提升了17.78%,在整个制冷季，冷凝水水冷式PV/T系统较单一的PV系统净发电量增加了365.55 kW·h,具有6 938.27 kW·h的节能效益，可减排6.439 t二氧化碳。

Application and Analysis on Condensate Water-cooled PV/T System in Shopping Mall

Solar photovoltaic-thermal (PV/T) technology combines photovoltaic and photothermal to achieve the improvement of power generation efficiency and the recovery of low-grade heat sources. Based on the real-time recovery of condensate water from air conditioners in the shopping mall, a condensate water-cooled PV/T system model is established to study its system performance and environmental benefits. After the hourly volume of air-conditioning condensate water is accurately calculated in the shopping mall, the performance of the condensate water-cooled PV/T system and the single photovoltaic (PV) system are compared and analyzed. The results show that the condensate water-cooled PV/T system reduces the temperature of photovoltaic panels by collecting a large amount of condensate generated by the air conditioning in the mall during the cooling season as a cooling medium. The photovoltaic efficiency on a typical day is increased by 17.78%. During the entire cooling season, the condensate water-cooled PV/T system increases the net power generation by 365.55 kW.h than that of the single PV system, which produce the energy-saving benefit of 6 938.27 kW·h and can reduce carbon dioxide emissions by 6.439 tons.