The present investigation focuses on theoretical performance of various new environment-friendly refrigerant mixtures as substitutes to high global warming potential refrigerant R22. In this investigation, 34 refrigerants were considered at various composition. In this work, both complex vapor compression cycle (actual cycle) and standard vapor compression cycle (ideal cycle) was considered for the performance assessment of refrigerants. Vital studies such as flammability, toxicity, and environmental impact of various novel refrigerants were also carried out in this study. Results obtained from actual cycle showed that the coefficient of performance of refrigerant mixture RM40 (R1270/R134a 90/10 in mass %) (2.728) was the greatest among 34 investigated alternatives and it was closer to the coefficient of performance of R22 (2.770). Compressor discharge temperature of RM40 was 13.36 ℃ lower when compared with R22. Volumetric refrigeration capacity of RM40 (3335 kJ/m3) was slightly higher than that of R22 (3297 kJ/m3). Power spent per ton of refrigeration of RM40 (1.288 kW/TR) was marginally higher than that of R22 (1.269 kW/TR). Global warming potential (GWP100) of RM40 (133) was very low compared to the GWP100 of R22 (1760). Total equivalent warming index (environmental impact) of RM40 was 5.61% lower than R22. However, performance results obtained from standard cycle for various investigated refrigerants were better than actual cycle, since various losses occur were neglected in the standard cycle. Overall, thermodynamic performance of refrigerant mixture RM40 (R1270/R134a 90/10 in mass %) obtained from both actual and standard cycle was the highest among 34 investigated refrigerants and it was very closer to the performance of R22 and hence, it could be considered as an environment-friendly alternative to replace high GWP refrigerant R22 used in refrigeration systems.

中文翻译：

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制冷系统中各种新型环保制冷剂的理论热力学性能评估

本研究侧重于各种新型环保混合制冷剂作为高全球变暖潜势制冷剂 R22 的替代品的理论性能。在本次调查中，考虑了 34 种不同成分的制冷剂。在这项工作中，复杂蒸汽压缩循环（实际循环）和标准蒸汽压缩循环（理想循环）都被考虑用于制冷剂的性能评估。本研究还进行了重要的研究，例如各种新型制冷剂的易燃性、毒性和环境影响。从实际循环获得的结果表明，制冷剂混合物 RM40 (R1270/R134a 90/10 质量 %) (2.728) 的性能系数在 34 个被调查的替代品中最大，它更接近 R22 的性能系数 (2.770) . RM40的压缩机排气温度比R22低13.36℃。RM40（3335 kJ/m3）的容积制冷量略高于R22（3297 kJ/m3）。每吨制冷耗电量 RM40 (1.288 kW/TR) 略高于 R22 (1.269 kW/TR)。与 R22 (1760) 的 GWP100 相比，40 令吉 (133) 的全球变暖潜能值 (GWP100) 非常低。RM40 的总等效变暖指数（环境影响）比 R22 低 5.61%。然而，从标准循环获得的各种研究制冷剂的性能结果优于实际循环，因为在标准循环中忽略了发生的各种损失。全面的，