Performance optimization for a variable throat ejector in a solar refrigeration system

R.H. Yen, B.J. Huang, C.Y. Chen, T.Y. Shiu, C.W. Cheng, S.S. Chen, K. Shestopalov

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


In a solar vapor ejector refrigeration system, the solar heat supply may vary because of variations in solar irradiation intensity, making it difficult to maintain a steady generator temperature. To improve ejector performance, this study proposes a variable throat ejector (VTEJ) and analyzes its performance using CFD simulations. The following conclusions can be drawn. An ejector with a greater throat area and larger solar collector allows a wider operating range of generator temperatures, but may be overdesigned and expensive. Conversely, decreasing the throat area limits the operating range of generator temperatures. Thus the ejector with a fixed throat area may be unsuitable to use solar energy as a heat source. For a VTEJ, this study derives a curve-fitting relationship between the optimum throat area ratio and the operating temperatures. Using this relationship to adjust the throat area ratio, the ejector can consistently achieve optimal and stable performances under a varying solar heat supply. © 2013 Elsevier Ltd and IIR. All rights reserved.
Original languageEnglish (US)
Pages (from-to)1512-1520
Number of pages9
JournalInternational Journal of Refrigeration
Issue number5
StatePublished - Aug 2013
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUK-C1-014-12
Acknowledgements: This publication is based on the work supported by Award No.KUK-C1-014-12, made by King Abdullah, University of Science and Technology (KAUST), Saudi Arabia.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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