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为了研究光伏-太阳能热泵热水系统的相关性能,针对该系统的结构特点,运用集总参数法分别建立了光伏/蒸发器、压缩机、冷凝器、电子膨胀阀的稳态数学模型。通过所建的模型分析了光伏-太阳能热泵热水系统在不同的环境温度、太阳辐射强度、风速以及压缩机转速下的光电、光热输出特性的变化规律;并以南京地区为例,将光伏-太阳能热泵热水系统与传统直膨式太阳能热泵热水系统、无冷却的太阳能光伏系统对比。结果显示,光伏-太阳能热泵系统较太阳能光伏系统的全年发电量提高了31.5%;光伏-太阳能热泵系统的全年平均热电综合性能系数可达到8.83,远高于传统太阳能热泵系统的性能系数。
In order to study the performance of photovoltaic-solar heat pump hot water system, the steady-state mathematical models of PV / Evaporator, compressor, condenser and electronic expansion valve were established by lumped parameter method according to the structural characteristics of the system. The model was used to analyze the variation characteristics of photovoltaic, solar thermal output characteristics under different ambient temperature, solar radiation intensity, wind speed and compressor speed. Taking Nanjing as an example, the photovoltaic - Comparison between Solar Heat Pump Hot Water System and Conventional Direct Expansion Solar Heat Pump Hot Water System, Uncooled Solar PV System. The results show that the PV-solar heat pump system has 31.5% more annual power generation capacity than the solar PV system, and the annual average solar thermal performance coefficient of the PV-solar heat pump system can reach 8.83, far higher than the performance coefficient of the traditional solar heat pump system.