Maximum mass flow ratio due to secondary flow choking in an ejector refrigeration system

The occurrence of flow choking in an ejector of an ejector refrigeration sy stem (ERS) was analysed and a model for predicting the maximum flow ratio o f the ejector was developed. The multi-parameter equation to calculate the mass flow ratio takes into account the performance of the primary nozzle, t he flow entrainment and mixing relating to ejector geometry and operating c onditions. We validated the model using the reported experimental data of r efrigerant R113, R141b and steam ERS. The present model was shown to provid e better accuracy compared with results obtained by applying the existing I -D ejector theory. We discussed the application of the model and highlighte d the significance of the parameters for future work. (C) 2001 Elsevier Sci ence Ltd and IIR. All rights reserved.