This paper numerically investigates the performance of a high capacity, industrial ejector chiller working with the non-flammable, low GWP refrigerant R1233zd(E). The test procedures adopted to acquire the experimental data are explained in part 1 of this work. Different turbulence models were examined in order to accurately predict the ejector off-design transition and critical pressure. A peculiar difference has been noticed between the numerical results obtained when initializing the CFD simulation from the solution of a case with lower or higher condenser pressure. This difference may partly explain the difficulties in the accurate predictions of the critical conditions reported by this and other works in the literature. A detailed discussion is presented on the nature and possible cause of this phenomenon, which is identified as typical of non-linear fluid dynamics.

本文从数值上研究了使用不燃，低GWP制冷剂R1233zd（E）的大容量工业喷射冷却器的性能。这项工作的第1部分介绍了用于获取实验数据的测试程序。检查了不同的湍流模型，以便准确预测喷射器偏离设计的过渡和临界压力。已经注意到，从冷凝器压力较低或较高的情况的解决方案初始化CFD模拟时获得的数值结果之间存在独特的差异。这种差异可能部分解释了准确预测此文献和其他文献所报道的关键条件方面的困难。对此现象的性质和可能原因进行了详细讨论，