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http://dx.doi.org/10.5916/jkosme.2015.39.9.890

Performance comparison of refrigeration cycle using R134a with the vapor-liquid ejector  

Yoon, Jung-In (Department of Refrigeration and Air-conditioning Engineering, Pukyong National University)
Kim, Chung-Lae (Department of Refrigeration and Air-conditioning Engineering, Pukyong National University)
Son, Chang-Hyo (Department of Refrigeration and Air-conditioning Engineering, Pukyong National University)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.39, no.9, 2015 , pp. 890-894 More about this Journal
Abstract
Recently, research on high-efficiency refrigeration cycles that apply an ejector to basic cycles has progressed actively. The role of the ejector and the performance of refrigeration cycles are subordinate to ejector locations. In this study, the performance of three refrigeration cycles with different ejector locations is compared and analyzed. The results showed an increased COP in all cycles due to the application of the ejector, with the highest increase of 44% compared to a basic refrigeration cycle. The ejector refrigeration cycle proposed in this study presents the highest COP, 3.47. Moreover, the decrease in condensation capacity in Bergander's cycle, Xing's cycle, and our proposed ejector refrigeration cycle went up to 21%. In refrigeration cycles applying the ejector, the pressure ratio of the ejector, the vapor fraction of discharge, and compression ratio are important factors for COP enhancement. For this reason, detailed and accurate control of these is significant.
Keywords
Vapor-liquid ejector; R134a; Ejector refrigeration cycle; Coefficient of performance;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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