不同角度反V型蒸发器变风量下换热性能的研究

发布时间：2019-06-10 08:58

【摘要】：机房空调的送风方式主要分为两类,即上送风(V型)和下送风(反V型)。通过焓差实验法研究了机房空调中不同角度反V型蒸发器的换热性能。所研究的角度分别为32.5°、39°、45.5°,并且研究了三种角度蒸发器分别在风量百分比为100%、90%、80%、70%时四种情况下的换热性能。对比分析了各种工况下的制冷量、能效比,并且从蒸发温度以及压缩机的吸、排气温度及压力、冷凝温度等方面分析造成这种差异的原因。研究结果表明,当夹角为39°和45.5°时,蒸发温度约高2℃,系统的换热性能较好。与角度32.5°相比,当风量百分比为100%和90%时,最大制冷量均提高2%左右;当风量百分比为80%和70%时,最大制冷量分别提高5.7%和6%,能效比分别提高了3.5%和6.7%。
[Abstract]:The air supply mode of air conditioning in computer room is mainly divided into two categories, namely, upper air supply (V type) and lower air supply (anti V type). The heat transfer performance of anti-V evaporator with different angles in computer room air conditioning was studied by enthalpy difference experiment. The angles studied are 32.5 掳, 39 掳and 45.5 掳, respectively, and the heat transfer performance of the three angle evaporators is studied when the air volume percentage is 100%, 90%, 80% and 70%, respectively. The refrigerating capacity and energy efficiency ratio under various working conditions are compared and analyzed, and the reasons for this difference are analyzed from the aspects of evaporation temperature, suction, exhaust temperature and pressure of compressor, condensation temperature and so on. The results show that when the angle is 39 掳and 45.5 掳, the evaporation temperature is about 2 鈩，

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