极端工况下直膨式多太阳能集热蒸发器并联热泵系统的实验研究

EXPERIMENTAL STUDY ON DIRECT-EXPANSION SOLAR ASSISTED HEAT PUMP SYSTEM OF EVAPORATORS IN PARALLEL UNDER EXTREME WORKING CONDITIONS

该文建立直膨式多太阳能集热蒸发器并联热泵系统的实验装置,分析在极端工况下,单个太阳能集热蒸发器的热性能和蒸发器阵列的整体热性能及其对系统运行的影响。结果表明在极端工况下,虽然A、B组蒸发器的吸热量存在差异,甚至A组蒸发器出口处制冷剂的过热度接近零,但是系统性能系数COP达3.69,所以蒸发器阵列的整体热性能满足要求;吸热量较多的蒸发器组,其出口处制冷剂过热度大,进一步验证了直膨式多太阳能集热蒸发器并联热泵系统是可靠的。

It established a experimental device about direct expansion more solar collector evaporator parallel with heat pump system,in the extreme working condition,the thermal performance of solar heat pump is analyzed.It shows that under the extreme working condition,though there are differences of two evaporator sets heat absorption and even a evaporator consume too little heat causes coolant overheat is close to zero,but the COP of the system reaches 3.69.Therefore,the thermal property of evaporators in parallel can meet request.The more heat absorption,the higher refrigerant superheat at the exit.It proves that direct-expansion solar heat pump system of evaporators in parallel is reliable.