Abstract This paper presents a novel liquid-vapor separation condensation ejector refrigeration cycle (LERC). The zeotropic mixture (R245fa/R134a) is used as the working fluid. And the fluid composition of primary and secondary flow are controlled by a heat exchanger and liquid-vapor separator. A constant pressure ejector model is established to evaluate the influence of fluid composition, vapor quality and other parameters on the cycle performance. Then the cycle performance is compared with the traditional ejector refrigeration cycle (ERC). It is found that COP achieves a maximum of 0.13 with mixture R245fa/R134a (0.5/0.5), and the exergy efficiency achieves a maximum of 10.53% with mixture R245fa/R134a (0.6/0.4). As the vapor quality increases from 0.1 to 0.2, the cycle COP increases from 0.08 to 0.19, the exergy efficiency increases from 7.78% to 12.49% and the area ratio decrease from 5.18 to 4.53 with mixture R245fa/R134a (0.5/0.5). The parametric analysis shows that the cycle performs better in higher vapor quality, lower generating temperature and lower condensing temperature.

中文翻译：

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具有共沸混合物的新型液气分离冷凝喷射器制冷循环的理论分析

摘要 本文提出了一种新型的液汽分离冷凝喷射器制冷循环（LERC）。共沸混合物 (R245fa/R134a) 用作工作流体。一次流和二次流的流体成分由换热器和液汽分离器控制。建立恒压喷射器模型，评估流体成分、蒸汽质量等参数对循环性能的影响。然后将循环性能与传统的喷射器制冷循环（ERC）进行比较。发现混合R245fa/R134a (0.5/0.5)的COP达到最大值0.13，混合R245fa/R134a (0.6/0.4)的火用效率达到最大值10.53%。随着蒸汽质量从 0.1 增加到 0.2，循环 COP 从 0.08 增加到 0.19，火用效率从 7 增加。使用混合物 R245fa/R134a (0.5/0.5)，78% 到 12.49%，面积比从 5.18 减少到 4.53。参数分析表明，该循环在较高的蒸汽质量、较低的发生温度和较低的冷凝温度方面表现更好。