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    An Experimental Investigation of Steam Ejector Refrigeration Systems

    Source: Journal of Thermal Science and Engineering Applications:;2012:;volume( 004 ):;issue: 003::page 31004
    Author:
    Jingming Dong
    ,
    D. A. Pounds
    ,
    P. Cheng
    ,
    H. B. Ma
    DOI: 10.1115/1.4006714
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: 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.
    keyword(s): Pressure , Temperature , Diffusers , Ejectors , Nozzles , Refrigeration , High temperature steam AND Condensers (steam plant) ,
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      An Experimental Investigation of Steam Ejector Refrigeration Systems

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/150273
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    contributor authorJingming Dong
    contributor authorD. A. Pounds
    contributor authorP. Cheng
    contributor authorH. B. Ma
    date accessioned2017-05-09T00:54:30Z
    date available2017-05-09T00:54:30Z
    date copyrightSeptember, 2012
    date issued2012
    identifier issn1948-5085
    identifier otherJTSEBV-926075#031004_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/150273
    description abstractA 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.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleAn Experimental Investigation of Steam Ejector Refrigeration Systems
    typeJournal Paper
    journal volume4
    journal issue3
    journal titleJournal of Thermal Science and Engineering Applications
    identifier doi10.1115/1.4006714
    journal fristpage31004
    identifier eissn1948-5093
    keywordsPressure
    keywordsTemperature
    keywordsDiffusers
    keywordsEjectors
    keywordsNozzles
    keywordsRefrigeration
    keywordsHigh temperature steam AND Condensers (steam plant)
    treeJournal of Thermal Science and Engineering Applications:;2012:;volume( 004 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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