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An Experimental Study on the Performance of $CO_2$ Air-conditioning Cycle Equipped with an Ejector  

Kim, Mo-Se (School of Mechanical and Aerospace Engineering, Seoul National University)
Lee, Jae-Seung (School of Mechanical and Aerospace Engineering, Seoul National University)
Kim, Min-Soo (School of Mechanical and Aerospace Engineering, Seoul National University)
Publication Information
International Journal of Air-Conditioning and Refrigeration / v.17, no.3, 2009 , pp. 100-106 More about this Journal
Abstract
As an effort to prevent environmental problems caused by ozone depletion and global warming, alternative refrigerants are being developed, and one of the candidates is carbon dioxide. To overcome slightly low efficiency of $CO_2$ refrigeration system, air-conditioning cycle using an ejector was suggested. Ejector compensates throttling loss in an expansion device by reducing compression work. In this study, the ejector refrigeration cycle using $CO_2$ as a refrigerant is investigated to understand the effect of the mixing section diameter and refrigerant charge amount on the performance. If mixing section diameter is too large or too small, either cases show low performance. The optimum refrigerant charge amount which gives the best performance is found for standard operating conditions. The air-conditioning cycle was analyzed for several operating conditions.
Keywords
Carbon dioxide; Refrigeration system; Ejector; Expansion device; Performance;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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