| Title |
A Numerical Study on the Performance of a Vapor Compression Cycle Equipped with an Ejector Using Refrigerants R1234yf and R134a |
| Authors |
Honghyun Cho ; Chasik Park |
| DOI |
http://dx.doi.org/10.6110/KJACR.2015.27.7.362 |
| Keywords |
이젝터 ; 유입비 ; 면적비 ; R1234yf ; 지구온난화지수 ; 성능계수 Ejector ; Entrainment ratio ; Area ratio ; R1234yf ; GWP ; COP |
| 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. |