光伏空气源热泵的研究与开发

RESEARCH AND DEVELOPMENT OF PHOTOVOLTAIC AIR SOURCE HEAT PUMP SYSTEMS

基于中国北方地区冬季采暖"煤改电"工程中使用的空气源热泵机组,提出与光伏发电相结合的系统方案。在不改变原有系统结构和控制方式的前提下,白天采用光伏优先、市电保障的双电源供电模式,研究将光伏电能高效注入系统的控制策略,优化光伏阵列容量配置,开发控制器样机。实验结果表明,系统运行稳定,在华北地区光伏阵列的最优容量配置约为系统标称额定功率的1/2,光伏发电效率高,全采暖季白天平均能提供约30%的压缩机用电量,具有良好的经济效益。

Based on the air-source heat pump units generally used in the"coal to electricity"project for winter heating in northern China,a system scheme combined with photovoltaic(PV)power generation is proposed in this paper.On the premise of keeping the original system structure and control method unchanged,a dual power supply mode with PV power generation priority and utility power support is adopted in the daytime.The control strategy of efficiently injecting PV energy into the system is studied,and a controller prototype is developed.System experiments are carried out to verify system operation characteristics and PV power generation performance.The experimental results show that the system operates stably,and the optimal capacity configuration of PV array in North China is roughly the half of the nominal rated power of the system.In the entire heating seasons,the developed system can provide an average of roughly 30%of the compressor power consumption during the day,which bears high PV power generation efficiency and good economic benefits.