改变小通道蒸发器形状和尺寸以提高co & _ _ _ _ _ _ _ _ _ _ 2空调循环制冷量的研究

Kimhang Vo, Thanhtrung Dang
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引用次数: 0

摘要

对改变小通道蒸发器的形状和尺寸以提高$CO_{2}$空调循环的制冷量进行了实验研究。设计了两个换热面积相同、通道长度不同的小通道蒸发器。在本研究中,两个蒸发器的环境温度均为32.5^{0}C。对于这两种情况,冷却器压力和蒸发器压力分别为77bar和42bar。结果表明,长度较短的E2蒸发器的制冷量比长度较长的E1蒸发器的制冷量高6.6 t, E2的出风口温度比E1低1.4 t。此外,蒸发器E2的温度分布优于蒸发器E1。研究还得出E2的COP为$\theta。比从E1获得的多22美元。
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A Study on Change of the Shape and Size of the Minichannel Evaporators to Enhance the Cooling Capacity of the CO&underscore;2 Air Conditioning Cycle
An experimental on the change of the shape and size of the minichannel evaporators to increase the cooling capacity of the $CO_{2}$ air conditioning cycle was carried out. Two minichannel evaporators with the same heat transfer area were designed with different channel lengths. In this study, the ambient temperature was tested for both evaporators at $32.5^{o}C$. For both cases, the cooler pressure and evaporator pressure are 77 bar and 42 bar, respectively. The results show that the cooling capacity of the evaporator E2 (shorter length) is 6.6 better than that obtained from the evaporator E1 (longer length): the air outlet temperature of E2 is 1.4 t lower than that of E1. In addition, the temperature distribution of the evaporator E2 is better than that of the evaporator E1. The study also concluded that the COP of the E2 is $\theta.22$ larger than that obtained from the E1.
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