Abstract Descriptions of how cryocoolers operate frequently take an energy-centric view. Such descriptions concentrate on the first law of thermodynamics, the conservation of energy. This approach can result in a complex description of the cooler in terms of energy and enthalpy flows. An alternative is to take an entropy-centric approach. Closely related to this is the exergy-centric approach. These descriptions concentrate on the second law of thermodynamics, the generation of entropy or the destruction of exergy. Both the energy-centric and exergy/entropy-centric approaches make use of the first two laws of thermodynamics and both approaches give equivalent descriptions of a cryocooler. However, the latter approach can be more useful as it can yield a simpler description, one that emphasis loss mechanisms. This paper reviews the application of these approaches to pulse tube cryocoolers. For each component of ideal pulse tubes the effects of the component on the exergy, entropy, and enthalpy flows are found. The discussion concentrates on orifice type pulse tubes. While most of the discussion is applicable to cryocoolers driven by either Gifford-McMahon or linear compressors; the emphasis is on the latter.


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    Title :

    Enthalpy, Entropy, and Exergy Flows in Ideal Pulse Tube Cryocoolers


    Contributors:
    Kittel, P. (author)

    Published in:

    Publication date :

    2005-01-01


    Size :

    9 pages




    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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