Experiments performed, which investigated the suitability of Molybdenum electrodes, planar converter with 0.5-mm inter-electrode gap for low temperature, energy conversion applications. Results confirmed that for T E <1773  K , the performance of the present converter is superior to that with a tungsten emitter, when operated at near same conditions. The largest difference occurred at T E ∼1600  K and T c ∼1000  K , at which the maximum electric power density (3.0 W c /cm 2 ) is 70% higher than that of the converter with a W emitter, at more than double the output voltage (0.43 vs. 0.21 V) and at lower cesium pressure (∼105 Pa vs. 245 Pa). Differences in the maximum electric power density of 25% and 50% occurred at T E =1700  K , T c =1000  K and T E =1600  K and T c =800  K , respectively, and consistently at lower cesium pressure and higher output voltage, which are major advantages for practical applications. The measured electric power density of the present converter of ∼3.22 W c /cm 2 occurred at T E =1673  K , T C =973  K , at slightly higher output voltage (0.49 V), and P C (241 Pa), and at an estimated conversion efficiency of 12.74%.


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    Title :

    Experimental investigation of a thermionic converter with Molybdenum electrodes for low temperature applications


    Contributors:

    Conference:

    Space Technology and Applications International Forum - 2001 ; 2001 ; Albuquerque, New Mexico


    Published in:

    AIP Conference Proceedings ; 552 , 1 ; 1142-1151


    Publication date :

    2001-02-02


    Size :

    10 pages





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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