研究表明，与纯制冷剂相比，在制冷系统中使用混合制冷剂可能会显示出某些性能优势。在几种可能的二元混合物中，研究主要局限于R-12和R-22混合物，可用数据大多以F.P.S.单位表示。这些混合物的热力学性质图是以S.I.单位编制的。还编制了一份综合焓-浓度图，该图有助于确定汽相和液相平衡共存时的热力学状态。 g、 ，在液体沸腾或蒸汽凝结时。利用这些图表，可以分析混合制冷剂循环。举例说明了恒定蒸发压力为1.0巴和恒定冷凝压力为14.0巴的情况。混合制冷剂循环还分析了固定蒸发器露点温度258 K和固定冷凝器泡点温度303 K之间的几种成分。引文:ASHRAE交易，第87卷，第1部分，伊利诺伊州芝加哥

Studies have indicated that the use of mixed refrigerants in a refrigeration system may show certain performance advantages over pure refrigerants. Of the several binary mixtures possible, studies have been restricted mainly to R-12 and R-22 mixtures, and the data avai1ab1e are mostly in F.P.S. units. The thermodynamic property charts of these mixtures have been compiled in S.I. units. A comprehensive enthalpy-concentration chart has also been prepared which is helpful in determining the thermodynamic state of vapor and liquid phases when they coexist in equilibrium, e.g., during the boiling of liquid or condensation of vapor. Using these charts, a mixed refrigerant cycle can be analyzed. Illustrated examples have been included for a constant evaporating pressure of 1.0 bar and a constant condensing pressure of 14.0 bar.The mixed refrigerant cycle has also been analyzed for several compositions between a fixed evaporator dew point temperature of 258 K and a fixed condenser bubble point temperature of 303 K.