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    The Regenerative Criteria of an Irreversible Brayton Heat Engine and its General Optimum Performance Characteristics

    Source: Journal of Energy Resources Technology:;2006:;volume( 128 ):;issue: 003::page 216
    Author:
    Yue Zhang
    ,
    Bihong Lin
    ,
    Jincan Chen
    ,
    Congjie Ou
    DOI: 10.1115/1.2213272
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: An irreversible cycle model of the Brayton heat engine is established, in which the irreversibilities resulting from the internal dissipation of the working substance in the adiabatic compression and expansion processes and the finite-rate heat transfer in the regenerative and constant-pressure processes are taken into account. The power output and efficiency of the cycle are expressed as functions of temperatures of the working substance and the heat sources, heat transfer coefficients, pressure ratio, regenerator effectiveness, and total heat transfer area including the heat transfer areas of the regenerator and other heat exchangers. The regenerative criteria are given. The power output is optimized for a given efficiency. The general optimal performance characteristics of the cycle are revealed. The optimal performance of the Brayton heat engines with and without regeneration is compared quantitatively. The advantages of using the regenerator are expounded. Some important parameters of an irreversible regenerative Brayton heat engine, such as the temperatures of the working substance at different states, pressure ratio, maximum value of the pressure ratio, regenerator effectiveness and ratios of the various heat transfer areas to the total heat transfer area of the cycle, are further optimized. The optimal relations between these parameters and the efficiency of the cycle are presented by a set of characteristic curves for some assumed compression and expansion efficiencies. The results obtained may be helpful to the comprehensive understanding of the optimal performance of the Brayton heat engines with and without regeneration and play a theoretical instructive role for the optimal design of a regenerative Brayton heat engine.
    keyword(s): Pressure , Heat engines , Cycles , Performance characterization , Heat transfer , Temperature AND Functions ,
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      The Regenerative Criteria of an Irreversible Brayton Heat Engine and its General Optimum Performance Characteristics

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    http://yetl.yabesh.ir/yetl1/handle/yetl/133588
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    contributor authorYue Zhang
    contributor authorBihong Lin
    contributor authorJincan Chen
    contributor authorCongjie Ou
    date accessioned2017-05-09T00:19:40Z
    date available2017-05-09T00:19:40Z
    date copyrightSeptember, 2006
    date issued2006
    identifier issn0195-0738
    identifier otherJERTD2-26538#216_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/133588
    description abstractAn irreversible cycle model of the Brayton heat engine is established, in which the irreversibilities resulting from the internal dissipation of the working substance in the adiabatic compression and expansion processes and the finite-rate heat transfer in the regenerative and constant-pressure processes are taken into account. The power output and efficiency of the cycle are expressed as functions of temperatures of the working substance and the heat sources, heat transfer coefficients, pressure ratio, regenerator effectiveness, and total heat transfer area including the heat transfer areas of the regenerator and other heat exchangers. The regenerative criteria are given. The power output is optimized for a given efficiency. The general optimal performance characteristics of the cycle are revealed. The optimal performance of the Brayton heat engines with and without regeneration is compared quantitatively. The advantages of using the regenerator are expounded. Some important parameters of an irreversible regenerative Brayton heat engine, such as the temperatures of the working substance at different states, pressure ratio, maximum value of the pressure ratio, regenerator effectiveness and ratios of the various heat transfer areas to the total heat transfer area of the cycle, are further optimized. The optimal relations between these parameters and the efficiency of the cycle are presented by a set of characteristic curves for some assumed compression and expansion efficiencies. The results obtained may be helpful to the comprehensive understanding of the optimal performance of the Brayton heat engines with and without regeneration and play a theoretical instructive role for the optimal design of a regenerative Brayton heat engine.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleThe Regenerative Criteria of an Irreversible Brayton Heat Engine and its General Optimum Performance Characteristics
    typeJournal Paper
    journal volume128
    journal issue3
    journal titleJournal of Energy Resources Technology
    identifier doi10.1115/1.2213272
    journal fristpage216
    journal lastpage222
    identifier eissn1528-8994
    keywordsPressure
    keywordsHeat engines
    keywordsCycles
    keywordsPerformance characterization
    keywordsHeat transfer
    keywordsTemperature AND Functions
    treeJournal of Energy Resources Technology:;2006:;volume( 128 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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