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针对现有R22替代工质所存在的问题,本文提出用环保性能好、饱和蒸气压接近R22的天然工质丙烯(R1270)作为R22的新型替代工质,通过对R1270、R22和R290的热物理性质和热力学循环性能的分析、比较,发现R1270替代R22可以在一定程度上改善系统的运行特性,并比R22的现有替代工质R290更具有优势。
In order to solve the existing problems of R22 substitutive working fluid, this paper proposes a new substitutive working fluid of natural propene (R1270) which has good environmental performance and saturated vapor pressure close to R22. The thermal physical properties of R1270, R22 and R290 The analysis and comparison of the properties and thermodynamic cycle performance of the R1270 show that R1270 replaces R22 to some extent to improve the operating characteristics of the system and is more advantageous than the existing alternative refrigerant R290 of R22.