Abstract PV/T (photovoltaic/thermal) technology is a combination of PV module (photovoltaic utilization) and collector (photothermal utilization), which can improve the comprehensive utilization efficiency of solar energy and has a broad application prospect. In this paper, PV/T module is coupled with heat pump evaporator to form a direct-expansion solar PV/T heat pump which is suitable for heat application in high latitude area. To achieve stable residential heating, a solar PV/T heat pump system coupled with build-in PCM (phase change material) heat storage is therefore proposed and simulated. Meanwhile, the mathematical model of solar PV/T heat pump coupled with build-in PCM heat storage system is established and verified. The simulation results show that the temperature of underfloor heating which using build-in PCM heat storage can reach 22–31 °C after 39 h when the circulating water is 40 °C. Moreover, the heating COP (Coefficient of Performance) increases with the increase of solar radiation, ambient temperature and area of PV/T collector, and decrease of wind speed, respectively. A 20 m2 PV/T panel module can output 21.4% of the electricity to power grid when the solar radiation intensity is 600 W/m2 and meet the heat demand of a 100 m2 room while maintain the operation of the system. Meanwhile, the heating COP can reach 5.79 which is 70% higher than the conventional air conditioning system and the electrical, thermal, overall efficiencies are 17.77%, 55.76% and 75.49%, respectively.

中文翻译：

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基于PV/T面板的太阳能辅助热泵内置PCM蓄热性能分析

摘要 PV/T（photovoltaic/thermal）技术是光伏组件（光伏利用）和集热器（光热利用）的结合，可以提高太阳能的综合利用效率，具有广阔的应用前景。本文将 PV/T 组件与热泵蒸发器耦合形成直膨式太阳能 PV/T 热泵，适用于高纬度地区供热。为了实现稳定的住宅供暖，因此提出并模拟了与内置 PCM（相变材料）蓄热相结合的太阳能 PV/T 热泵系统。同时，建立并验证了太阳能PV/T热泵与内置PCM蓄热系统耦合的数学模型。仿真结果表明，当循环水温度为40°C时，使用内置PCM蓄热的地暖在39小时后温度可达22-31°C。此外，加热COP（性能系数）分别随着太阳辐射、环境温度和PV/T集热器面积的增加以及风速的减小而增加。当太阳辐射强度为600 W/m2时，一个20 m2 PV/T面板组件可以向电网输出21.4%的电量，在维持系统运行的同时满足100 m2房间的热量需求。同时，制热COP可达5.79，比传统空调系统提高70%，电、热、综合效率分别为17.77%、55.76%和75.49%。采暖COP（Coefficient of Performance）分别随着太阳辐射、环境温度和PV/T集热器面积的增加以及风速的减小而增加。当太阳辐射强度为600 W/m2时，一个20 m2 PV/T面板组件可以向电网输出21.4%的电量，在维持系统运行的同时满足100 m2房间的热量需求。同时，制热COP可达5.79，比传统空调系统提高70%，电、热、综合效率分别为17.77%、55.76%和75.49%。采暖COP（Coefficient of Performance）分别随着太阳辐射、环境温度和PV/T集热器面积的增加以及风速的减小而增加。当太阳辐射强度为600 W/m2时，一个20 m2 PV/T面板组件可以向电网输出21.4%的电量，在维持系统运行的同时满足100 m2房间的热量需求。同时，制热COP可达5.79，比传统空调系统提高70%，电、热、综合效率分别为17.77%、55.76%和75.49%。当太阳辐射强度为600W/m2时，4%的电量进入电网，满足100m2房间的热量需求，同时维持系统运行。同时，制热COP可达5.79，比传统空调系统提高70%，电、热、综合效率分别为17.77%、55.76%和75.49%。当太阳辐射强度为600W/m2时，4%的电量进入电网，满足100m2房间的热量需求，同时维持系统运行。同时，制热COP可达5.79，比传统空调系统提高70%，电、热、综合效率分别为17.77%、55.76%和75.49%。