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http://dx.doi.org/10.6110/KJACR.2015.27.7.362

A Numerical Study on the Performance of a Vapor Compression Cycle Equipped with an Ejector Using Refrigerants R1234yf and R134a  

Cho, Honghyun (Department of Mechanical Engineering, Chosun University)
Park, Chasik (School of Mechanical Engineering, Hoseo University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.27, no.7, 2015 , pp. 362-368 More about this Journal
Abstract
This paper presents a numerical study on the performance of a vapor compression cycle equipped with an ejector as an expansion device to improve the COP by reducing the expansion loss and compressor work. The simulation is carried out using a model based on the conservation of mass, energy and momentum in the ejector. From the results of the simulation, the vapor compression cycle equipped with an ejector showed a maximum COP improvement of 14.0% when using R134a refrigerant and 16.8% when using R1234yf. In addition, the performance of the system with an ejector represents the increased performance as the temperature difference between condensing and evaporating increased.
Keywords
Ejector; Entrainment ratio; Area ratio; R1234yf; GWP; COP;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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