From the last few years, the use of efficient ejector in refrigeration systems has been paid a lot of attention. In this article a description of a refrigeration system that combines a basic vapor compression refrigeration cycle with an ejector cooling cycle is presented. A one-dimensional mathematical model is developed using the flow governing thermodynamic equations based on a constant area ejector flow model. The model includes effects of friction at the constant-area mixing chamber. The current model is based on the NIST-REFPROP database for refrigerant property calculations. The model has basically been used to determine the effect of the ejector geometry and operating conditions on the performance of the whole refrigeration system. The results show that the proposed model predicts ejector performance, entrainment ratio and the coefficient of performance of the system and their sensitivity to evaporating and generating temperature of the cascade refrigeration cycle. The simulated performance has been then compared with the available experimental data from the literature for validation.

中文翻译：

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喷射-蒸汽压缩制冷循环的参数分析

从最近几年开始，在制冷系统中使用高效的喷射器已经引起了很多关注。在本文中，对制冷系统进行了描述，该制冷系统将基本的蒸气压缩制冷循环与喷射器冷却循环相结合。使用基于恒定面积喷射器流动模型的流动控制热力学方程式开发一维数学模型。该模型包括恒定面积混合室中的摩擦力影响。当前模型基于NIST-REFPROP数据库进行制冷剂性能计算。该模型已基本用于确定喷射器的几何形状和运行条件对整个制冷系统性能的影响。结果表明，该模型可预测喷射器性能，夹带率和系统的性能系数，以及它们对级联制冷循环蒸发和产生温度的敏感性。然后将模拟性能与文献中的可用实验数据进行比较以进行验证。