Abstract:

In virtue of desiccant rotor’s dehumidification and air-cleaning, a novel system combining desiccant rotor and heat pump combined system was proposed, in which the evaporator of heat pump cooled the hot air after desiccant rotor, while the condenser supplied regeneration energy to desiccant rotor.Therefore, an air source heat pump using R142b as refrigerant was developed and tested experimentally in psychrometric room, which can simulate dehumidification air and regeneration air of the desiccant rotor.The cycle performance and discharge pressure of air source heat pump were investigated by varying the outdoor temperature and indoor air intake of the condenser.It showed that the heat pump could supply hot air at 79.2℃, while outdoor temperature was （45±0.2）℃ and inlet air temperature was （27±0.2）℃.In this case, the discharge pressure of compressor was within the range of compressor’s normally operating pressure.The results suggested that hot air heated by the condenser could satisfy desiccant rotor’s regeneration without other auxiliary heating systems.The cooling and heating capacity could be matched in this combining desiccant cooling system and the total energy consumed could be reduced significantly.Thus it could save energy and reduce environment pollution.

Key words:

除湿转轮空调系统, 高温热泵, 循环性能, R142b

摘要：

提出一种新型的除湿转轮与高温热泵联合运行的空调系统，该系统利用热泵的蒸发器对除湿后的热空气进行降温处理，同时将冷凝器释放的热量为除湿转轮提供再生能耗，在系统内部实现冷量和热量的抵消，既降低系统能耗又减少环境污染。为此研制了采用工质R142b的空气源热泵，将机组置于可模拟转轮处理空气和再生空气状态的标准空气焓差室对其性能进行测试。通过改变室外侧环境温度和进入冷凝器的风量研究R142b在空气源热泵机组中的循环性能和排气压力。结果表明：当蒸发器环境温度为（45±0.2）℃时，冷凝器进风温度为（27±0.2）℃时，灌注R142b的空气源热泵可产生79.2℃的热风，满足转轮的再生温度要求，且排气压力在压缩机的正常工作压力范围内。

关键词:

除湿转轮空调系统, 高温热泵, 循环性能, R142b