A steam ejector refrigeration system with a movable primary nozzle was developed in order to determine the nozzle exit position (NXP) effect on the coefficient of performance (COP). Experimental results show that there exists an optimum NXP for the ejector system investigated herein. The effects of the operating temperature, diffuser size, nozzle throat diameter, and mixing chamber configuration on the COP and critical back pressure were investigated experimentally. It is found that the critical back pressure and COP can be increased by increasing the low temperature evaporator (LTE) temperature and pressure. Although an increase of the high temperature evaporator (HTE) temperature can increase the critical condenser pressure, the system COP does not increase as the HTE temperature increases. The diffuser size significantly affects the critical back pressure but had almost no effect on the system COP. A finned mixing chamber was tested at NXP = 0 mm and NXP = 36 mm. Compared with the regular mixing chamber, the finned mixing chamber can increase the critical back pressure.
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e-mail: mah@missouri.edu
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September 2012
Research Papers
An Experimental Investigation of Steam Ejector Refrigeration Systems
Jingming Dong,
Jingming Dong
Institute of Marine Engineering and Thermal Science,
Marine Engineering College, Dalian Maritime University
, Dalian 116026, China
;Department of Mechanical & Aerospace Engineering, University of Missouri
, Columbia, MO 65211
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D. A. Pounds,
D. A. Pounds
Department of Mechanical & Aerospace Engineering,
University of Missouri
, Columbia, MO 65211
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P. Cheng,
P. Cheng
ThermAvant Technologies, LLC, Columbia, MO 65211
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H. B. Ma
H. B. Ma
LaPierre ProfessorFellow ASMEDepartment of Mechanical & Aerospace Engineering,
e-mail: mah@missouri.edu
University of Missouri
, Columbia, MO 65211
Search for other works by this author on:
Jingming Dong
Institute of Marine Engineering and Thermal Science,
Marine Engineering College, Dalian Maritime University
, Dalian 116026, China
;Department of Mechanical & Aerospace Engineering, University of Missouri
, Columbia, MO 65211
D. A. Pounds
Department of Mechanical & Aerospace Engineering,
University of Missouri
, Columbia, MO 65211
P. Cheng
ThermAvant Technologies, LLC, Columbia, MO 65211
H. B. Ma
LaPierre ProfessorFellow ASMEDepartment of Mechanical & Aerospace Engineering,
University of Missouri
, Columbia, MO 65211e-mail: mah@missouri.edu
J. Thermal Sci. Eng. Appl. Sep 2012, 4(3): 031004 (7 pages)
Published Online: July 16, 2012
Article history
Received:
May 27, 2011
Revised:
March 30, 2012
Online:
July 16, 2012
Published:
July 16, 2012
Citation
Dong, J., Pounds, D. A., Cheng, P., and Ma, H. B. (July 16, 2012). "An Experimental Investigation of Steam Ejector Refrigeration Systems." ASME. J. Thermal Sci. Eng. Appl. September 2012; 4(3): 031004. https://doi.org/10.1115/1.4006714
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