Abstract:

A novel photovoltaic/thermal integrated heat pump（PV/T-HP）system was developed for electricity generation and domestic hot water heating.PV modules were directly laminated on the surface of solar thermal collector，to the back of which evaporator tubes was adhered.Two different structures of PV/T-evaporators applying conventional copper tube and multi-port flat extruded tube were designed and investigated.Comparative analyzes on their characteristics indicated that the latter structure obtained a better performance，achieving a higher COP by 6%，and a higher power output by 2%.Using the meteorological data in Nanjing，China，the simulation results based on 150 L water heating load showed that such a PV/T-HP could generate electricity efficiently at the same time produced hot water with a COP ranged from 4.23 to 5.54 all year around.Moreover，an optimizing controlling principle was proposed to achieve a better overall performance.

摘要：

探讨了一种直接将热泵蒸发管设置在太阳能光伏集热板背面的新型光伏/光热一体化热泵（PV/T-HP）系统。设计了采用普通铜管和多孔铝扁管的两种集热/蒸发器结构，对二者进行性能模拟与对比分析。结果显示：采用多孔铝扁管集热蒸发器的热泵系统因其更好的传热性能而具备更高的电效率和制热性能系数。对PV/T-HP系统的全年运行性能模拟表明，该系统可同时高效地输出电能和制得50℃热水。此外还提出，根据季节和天气变化控制压缩机容量的控制策略优化系统运行以提高其全年综合性能。