等焓加湿翅片管式换热器与房间空调器性能的实验研究

Experiment on Performance of Heat Exchanger and Room Air-Conditioner with Isoenthalpy Humidification Finned Tube

针对等焓加湿翅片管式换热器和房间空调器的性能进行了实验研究。以热水作为被冷却介质,对换热器进行了对比实验研究,在不同环境温度下测量了原换热器换热量和淋水量为0.053kg/s下填料厚度分别为50mm、65mm、80mm和100mm时换热器的换热量。对等焓加湿房间空调器性能进行了对比实验研究。研究结果表明:等焓加湿可提高翅片管式换热器的冷却效果,且随着环境温度的增大,换热量增幅也增大;等焓加湿换热器的风量随填料厚度的增加而减小;淋水密度的大小决定了填料的湿润程度,在淋水量为0.053kg/s时,100mm厚填料的表面刚好完全湿润;在室外侧空气干球温度为35℃、湿球温度为24℃,室内侧空气干球温度为27℃、湿球温度为19.5℃时,等焓加湿房间空调器的能效比EER值提高了15.3%。

The experiments were conducted on the performances of a heat exchanger and a room air-conditioner with isoenthalpy humidification finned tubes.At different ambient temperatures,the heat transfer rate was measured for the heat exchanger without spray water and the heat exchanger with the packing thickness of 50mm,65mm,80mm and 100 mm and the spray water rate of 0.053kg/s,respectively.The results indicate that isoenthalpy humidification increased the cooling effect of the heat exchanger,and the increase amplitude of the heat transfer rate increased with the ambient temperature.The air flow rate of the heat exchanger decreased with an increase in the thickness of packing,and the spraying water consistency determined the wetness of packing.The surface of packing with the thickness of 100mm was wetted completely when spraying water rate was 0.053kg/s.In addition,the EER of the room air-conditioner with isoenthalpy humidification increased by 15.3% when the dry bulb temperature and wet bulb temperature of the outdoor air was 35℃ and 24℃,respectively,and the dry bulb temperature and wet bulb temperature of the indoor air was 27℃ and 19.5℃,respectively.