This paper presents the development of an innovative electrohydrodynamic (EHD) ion‐drag micropump for circulating liquid nitrogen in a cryogenic cooling loop. Two micropumps with different electrode designs were tested in this study. Their electrode arrays are composed of multi‐stages of saw‐tooth emitters and planar collectors electroplated on alumina substrates. The pumps had electrode spacings of 20 and 50 μm, respectively, for the distance between electrodes in a pair and 80 and 200 μm, respectively, for the distance between electrode pairs. The pump with closer electrode spacing produced a mass flow rate of twice the other pump at half the applied voltage. This improvement in performance is due to the closer electrode spacing, which allows the incorporation of more electrode pairs in a given pump size. The required voltage is also lowered, since the electric field is inversely proportional to the electrode spacing.


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    Titel :

    Development of Electrohydrodynamic (EHD) Micropumps for Cryogenic Applications


    Beteiligte:
    Foroughi, Parisa (Autor:in) / Zhao, Yuan (Autor:in) / Lawler, John (Autor:in) / Ohadi, Michael M. (Autor:in) / El-Genk, Mohamed S. (Herausgeber:in) / Bragg, Mary J. (Herausgeber:in)

    Kongress:

    SPACE TECHNOLOGY AND APPLICATIONS INT.FORUM-STAIF 2005: Conf.Thermophys in Micrograv;Conf Comm/Civil Next Gen.Space Transp; 22nd Symp Space Nucl.Powr Propuls.;Conf.Human/Robotic Techn.Nat'l Vision Space Expl.; 3rd Symp Space Colon.; 2nd Symp.New Frontiers ; 2005 ; Albuquerque, New Mexico (USA)


    Erschienen in:

    Erscheinungsdatum :

    06.02.2005


    Format / Umfang :

    9 pages





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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