Thought water is a good refrigerant, it is difficult to be used directly in a common compression refrigeration system due to its very low pressure and vapor density at the evaporation temperature.

由于水的蒸发压力低、比容大使得水作为制冷剂直接用于压缩式制冷系统还有很大的困难。

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In the evaporator, the liquid inside was for low pressure gas, and gasification draw was cooling medium heat produce refrigeration effect.

在蒸发器内，该液体被气化为低压气态，同时吸取被冷却介质的热量产生制冷效应。

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The results show that due to the low viscosity of DME in both gaseous and liquid phases, the pressure drop in DME refrigeration system can be reduced and refrigeration efficiency improved.

结果表明：由于二甲醚的气相和液相黏度都比较小，使用二甲醚作为制冷剂可以减小系统的阻力，有利于系统制冷性能的提高。

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