A detailed AMTEC performance and evaluation analysis model (APEAM) was developed to predict the performance of next-generation Pluto Express vapor-anode multitube cells. APEAM incorporates an axial electrochemical model, which accounts for the effects of nonuniform axial temperature and vapor pressure profiles along the BASE tubes; a detailed vapor pressure loss model, which includes free-molecular, transition and continuum flow regimes; and a comprehensive radiation/conduction model, which incorporates the effects of circumferential thermal shields above the BASE tubes and conduction studs between the hot end of the cell and the tubes support plate. Model results compared well with measured electrical power and experimental I-V characteristics of the PX-2C cell, recently tested at Phillips Laboratory. The cell peak electric power of 4.4 We occurred at an external load resistance of 3.0 Omega . At higher load resistance (or lower load demand), the PX-2C cell was load-following. Results also showed that the vapor flow on the low-pressure side of PX-2C was in the transition regime. The evaporator wick provided the sodium flow rate (8 g/hour) necessary to operate the cell at an evaporator temperature of about 950 K. The model predicted that using a molybdenum thermal shield on the inside of the cell wall, near the condenser, would increase the cell electric power and conversion efficiency by 23%.


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    Titel :

    Performance analysis of a multitube vapor-anode AMTEC cell


    Beteiligte:
    Tournier, J.M. (Autor:in) / El-Genk, M.S. (Autor:in) / Huang, Lianmin (Autor:in) / Schuller, M. (Autor:in)


    Erscheinungsdatum :

    1997


    Format / Umfang :

    8 Seiten, 15 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Optimization of Liquid-Return Artery in a Vapor-Anode, Multitube AMTEC

    El-Genk, M. S. / Tournier, J.-M. / University of New Mexico; School of Engineering; Institute for Space and Nuclear Power Studies | British Library Conference Proceedings | 1998


    Parametric Analyses of Vapor-Anode, Multitube AMTEC Cells for Pluto/Express Mission

    El-Genk, M. S. / Tournier, J.-M. / University of New Mexico; School of Engineering; Institute for Space and Nuclear Power Studies | British Library Conference Proceedings | 1998



    Radiation Conduction Model for Multitube AMTEC Cells

    Tournier, J.-M. / El-Genk, M. S. / University of New Mexico; School of Engineering; Institute for Space and Nuclear Power Studies | British Library Conference Proceedings | 1998


    Sodium Vapor Flow Regimes and Pressure Losses on Cathode Side of Multitube AMTEC Cell

    Tournier, J.-M. / El-Genk, M. S. / University of New Mexico; School of Engineering; Institute for Space and Nuclear Power Studies | British Library Conference Proceedings | 1998