Abstract In a Stirling-cycle cryocooler model a foil-type regenerator is split into two parts. The foil spacing in one part is increased while decreased in the other. This gives rise to DC flow circulations between the two parts and degrades overall cryocooler performance. Within the regenerator the internal temperature distribution tends to be skewed toward one end or the other, depending on the local direction of the DC flow. These temperature changes amplify the DC flow and significantly degrade performance unless prevented by means of transverse thermal coupling between the two parts of the regenerator. The problem worsens with decreasing temperature and increasing foil spacing. In the temperature range of 30–100 K, it is easily possible for a foil regenerator to degrade overall cooling efficiency (heat lift / compressor PV power) by 15% or more for a foil spacing variation of only ±10% between different parts of the regenerator.


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    Titel :

    Flow Circulations in Foil-Type Regenerators Produced by Non-Uniform Layer Spacing


    Beteiligte:
    Gedeon, D. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2005-01-01


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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