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首页> 外文期刊>Journal of Zhejiang University. Science, A >Cycle performance studies on a new HFC-161/125/143a mixture as an alternative refrigerant to R404A
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Cycle performance studies on a new HFC-161/125/143a mixture as an alternative refrigerant to R404A

机译：将新的HFC-161 / 125/143A混合物的循环性能研究作为R404a的替代制冷剂

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In this paper, a new ternary non-azeotropic mixture of HFC-161/125/143a (0.15/0.45/0.40 in mass fraction), as a promising mixed refrigerant to r404A, is presented. The ozone depletion potential (ODP) of the new refrigerant is zero and its basic thermodynamic properties are similar to those of r404A, but its global warming potential (GWP) is much smaller than those of R507A and r404A. Meanwhile, theoretical calculations show that, under the working condition I (the average evaporation temperature: ?23 °C, the average condensing temperature: 43 °C, the superheat temperature: 28 °C, the subcooling temperature: 5 °C), the volumetric refrigerating effect and specific refrigerating effect of the new mixture are 2.33% and 15.48% higher, respectively, than those of r404A. The coefficient of performance (COP) of the new mixture is 5.19% higher than that of r404A and the pressure ratio of the new mixture is 0.82% lower than that of r404A. Equally, under the working condition II (the average evaporation temperature: ?40 °C, the average condensing temperature: 35 °C, the superheating temperature: 30 °C, the subcooling temperature: 5 °C), the volumetric refrigerating effect and specific refrigerating effect of the new mixture are 2.24% and 20.58% higher, respectively, than those of r404A. The COP of the new mixture is 4.60% higher than that of r404A and the pressure ratio of the new mixture is similar to that of r404A. The performances of the new mixture and r404A are compared in a vapor compressor refrigeration apparatus originally designed for r404A under several working conditions (condensing temperatures: 35–45 °C, evaporation temperatures: ?40–?20 °C). Experimental results show that the new mixture can obtain a higher COP, by 6.3% to 12.1%, and a lower pressure ratio, by 1.8% to 6.6%, compared to r404A; although the discharge temperature of the new mixture is slightly higher than that of r404A. The advantages of the new mixture will be further verified in the actual system.
机译：本文介绍了HFC-161/125 / 143A的新三元非共沸混合物（质量分数0.15 / 0.45 / 0.40），作为对R404a的有前途的混合制冷剂。新制冷剂的臭氧耗尽电位（ODP）为零，其基本的热力学性质与R404a的基本热力学性质类似，但其全球变暖潜力（GWP）远小于R507a和R404a。同时，理论计算表明，在工作条件I（平均蒸发温度：α23℃，平均冷凝温度：43℃，过热温度：28℃，过冷温度：5°C）下，体积制冷效果和新混合物的特定制冷效果分别比R404A的433％和15.48％。新混合物的性能系数（COP）比R404a的性能（COP）高出5.19％，并且新混合物的压力比低于R404A的0.82％。同样地，在工作条件下（平均蒸发温度：α40℃，平均冷凝温度：35℃，过热温度：30℃，过冷温度：5°C），体积制冷效果和特定新混合物的制冷效果分别比R404A分别为2.24％和20.58％。新混合物的COP高于R404a的4.60％，新混合物的压力比与R404a的压力比相似。在若干工作条件下最初为R404a设计的蒸汽压缩机制冷装置（冷凝温度：35-45°C，蒸发温度：Δ40-≤20°C），将新混合物和R404a的性能进行比较。实验结果表明，与R404A相比，新混合物可以获得6.3％至12.1％，较低的压力比，较低的压力比为1.8％至6.6％;尽管新混合物的放电温度略高于R404a的温度。新混合物的优点将在实际系统中进一步验证。

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