 Geometry parameters effect for air-cooled ejector cooling systems with R134a refrigerantJia Yan, Wenjian Cai and Yanzhong Li Renewable Energy, 2012, vol. 46, issue C, 155-163 Abstract: In this paper, a CFD model calibrated by the experimental results from initial designed ejector is used to evaluate the influence of 6 key geometry parameters on the performance (entrainment ratio) of an air-cooled ejector cooling system and, consequently, to find the best design parameters. A new ejector according to the findings from the CFD simulation is then designed and used at the same air-cooled ejector system to verify the simulation results. From both simulation and testing results, we find that: 1) the optimal area ratio, the ratio of primary nozzle exist position and length of constant-area mixing section to primary nozzle diameter are lower than those of water-cooled ejector systems; 2) the optimal converging angle of constant-pressure mixing section and the ratio of primary nozzle exit position and length of constant-area mixing section to the diameter of constant-area mixing section are very close to those of water-cooled ejector systems; 3) substantial performance improvement can be achieved by using the new parameters in the ejector design. Keywords: Ejector cooling systems; Air-cooled; Geometry parameters; CFD simulation; Entrainment ratio; Testing (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:46:y:2012:i:c:p:155-163 DOI: 10.1016/j.renene.2012.03.031 Access Statistics for this article Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides More articles in Renewable Energy from Elsevier |
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