R410A引射器节流制冷循环热力学分析

Thermodynamic analysis of R410A ejector-expansion refrigeration system

对引射式制冷循环构建了热力学模型,并以R410A为制冷剂,在变冷凝温度、蒸发温度的条件下,将引射式制冷循环与普通制冷循环性能参数进行了对比分析。结果表明,与普通制冷循环相比,引射式制冷循环COP提升11. 63%-19. 44%,总损失减少1. 34kW-4. 67kW,第二定律效率提高1. 79%-5. 73%,各部件损明显降低,其中节流部件损降低最为明显,降低幅度为53. 26%-63. 44%。

A thermodynamic model of the ejector- expansion refrigeration cycle was developed. Using Rg10A as the refrigerant, the performance parameters of the ejector - expansion refrigeration cycle with the ordinary refrigeration cycle were compared under the conditions of variable condensation temperatures and evaporation temperatures. The results show that the COP of the ejector - expansion refrigeration cycle can be increased by 11.63% - 19.44% compared with the ordinary refrigeration cycle. The total exergy destruction is reduced by 1.34kW - 4.67kW, and the second thermal efficiency is increased by 1. 79% - 5. 73%. The exergy destruction of various components is significantly reduced, among which the destruction of throttling components is the most obvious, the decrease rate is 53.26 - 63.44%.