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Micromachines 2017, 8(8), 235; doi:10.3390/mi8080235

Numerical Investigation of Miniature Ejector Refrigeration System Embedded with a Capillary Pump Loop

Institute of Marine Engineering and Thermal Science, Marine Engineering College, Dalian Maritime University, Dalian 116026, China
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Received: 4 June 2017 / Revised: 9 July 2017 / Accepted: 25 July 2017 / Published: 28 July 2017
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Abstract

A miniature steam ejector refrigeration system embedded with a capillary pump loop can result in a compact design which can be used for electronics cooling. In this paper, computational fluid dynamics (CFD) is employed to investigate the effects of the area ratio of the ejector constant-area mixing section to the nozzle throat, the length of the constant-area section, and the nozzle exit position (NXP), on the performance of a miniature steam ejector. Results show that the performance of the miniature steam ejector is very sensitive to the area ratio of the constant-area mixing section to the nozzle. For the needs of practical application, the area ratio of the constant-area mixing section to the nozzle should be smaller than 16 when the temperature of the primary flow is 60 °C. The NXP plays an important role in the flow phenomena inside the miniature ejector. The critical back pressure is more sensitive to length of the constant-area mixing section than the entrainment ratio. Results of this investigation provided a good solution to the miniature steam ejector embedded with a capillary pump loop for electronics cooling application. View Full-Text
Keywords: miniature steam ejector; CFD; area ratio; NXP; electronics cooling miniature steam ejector; CFD; area ratio; NXP; electronics cooling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Dong, J.-M.; Song, H.; Yu, M.-Q.; Wang, W.-N.; Pan, X.-X. Numerical Investigation of Miniature Ejector Refrigeration System Embedded with a Capillary Pump Loop. Micromachines 2017, 8, 235.

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