光伏直驱冰蓄冷空调系统电能特性及蓄冷供冷性能分析

Energy Characteristics and Cooling Performance Analysis of the Ice Storage Air Conditioning System Directly Driven by PV

构建了一套由光伏直接驱动压缩机制冰蓄冷的空调系统,在典型多云天气下对压缩机运行稳定性及系统蓄冷供冷特性进行实验研究.实验结果表明,光电转换效率为10.99%,光伏逆控一体机的平均逆变效率约为96%,经逆变变频后三相电压、电流的最大不平衡度约为0.75%和1.99%;当瞬时辐照度大于111 W/m^ 2时,系统压缩机即可正常启动且稳定运行,系统性能系数为0.232.系统在白天工作9 h进行蓄冷,可以在夜间为26 m^ 2房间供冷7.4 h.

An air conditioning system directly driven by photovoltaic(PV)is constructed.The operating stability of the compressor and the refrigeration-cooling characteristics were studied under typical cloudy weather.The experimental results show that the photoelectric conversion efficiency is 10.99%,the average inverting efficiency of the photovoltaic invert control all-in-one machine is about 96%,and the maximum unbalance degree of the three-phase voltage and current after the invert conversion is about 0.75%and 1.99%.When the instantaneous irradiance is more than 111 W/m^ 2,the system compressor can start normally and run stably,and the system coefficient of performance is 0.232.The refrigeration system works for 9 hours during the day to store cold,and can provide 7.4 hours of cooling for a room of 26 m 2 at night.