液相热管型与气相热管型机房空调系统分析

Analysis on liquid heat pipe type and vapor heat pipe type air-conditioning system in computer room

分析液相热管型空调系统与气相热管型空调系统原理,并对比这2类空调系统制冷能力与运行能效。结果表明:定速液相热管型空调系统由于现有压缩机与膨胀阀调节的不足,通过运行混合模式增加系统制冷量、过冷度,提高能效比,但过高的制冷量输出易导致压缩机频繁启停,增加了实际使用能耗,且未能充分利用过渡季节自然冷源;变频液相热管型空调系统具备变制冷剂流量特性,在过渡季节无须液相热管运行即可利用自然冷源;气相热管型空调系统模式切换温度高于液相热管型空调系统;变频压缩机与气相热管复合型空调系统具有宽幅变流量特性,可充分利用过渡季节自然冷源,实现数据中心全年低成本高效制冷。

The principles of liquid heat pipe type airconditioning system and vapor heat pipe type airconditioning system are analyzed, and the cooling capacity and operating efficiency of these two kinds of airconditioning systems are compared. The results show that for the constant speed liquid heat pipe type airconditioning system, the adjustment of existing compressor and expansion valve is poor. Through the operation of mixed mode, the cooling capacity of the system and supercooling are increased, and the energy efficiency ratio is improved, but too much cooling capacity output easily leads to frequent start and stop of the compressor, increasing the actual energy consumption, and failing to make full use of natural cold source in the transition season. The frequency conversion heat pipe type airconditioning system with variable refrigerant flow characteristics, in the transition season, doesn’t need to run the heat pipe by using natural cold source. The mode switching temperature of vapor heat pipe type airconditioning system is higher than that of liquid heat pipe. The composite airconditioning system with frequencyconversion compressor and vapor heat pipe has wide variable flow characteristics, which can make full use of the natural cold source in the transition season, so as to achieve the low cost and high efficiency refrigeration in the data center.