The critical heat flux (CHF) primarily governs the upper limit of boiling device capability. It is essential to understand how the geometric parameters of porous coatings affect the CHF, in order to optimize two‐phase device performance. The objective of the present research is to better understand the CHF mechanism of pool boiling on horizontal conductive micro porous coated surfaces, through a systematic examination of the effects of the principal geometric dimensions on the CHF. In the present study, the test data indicated that the CHF on porous coated surfaces is strongly dependent on the coating thickness, volumetric porosity and mesh size. Test data also demonstrated that the CHF is distinguished by the critical thickness of the porous coatings for a given heating area. An optimal volumetric porosity exists when the mesh size and wick thickness are given. The wire diameter was found to play an important role in determining the CHF during the boiling process. Physical insight of the liquid and vapor flow pattern inside the porous media are revealed in this study.


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    Title :

    Experimental Studies on CHF of Pool Boiling on Horizontal Conductive Micro Porous Coated Surfaces


    Contributors:

    Conference:

    SPACE TECHNOLOGY AND APPLICATIONS INTERNATIONAL FORUM‐STAIF 2008: 12th Conference on Thermophysics Applications in Microgravity; 1st Symposium on Space Resource Utilization; 25th Symposium on Space Nuclear Power and Propulsion; 6th Conference on Human/Robotic Technology and the Vision for Space Exploration; 6th Symposium on Space Colonization; 5th Symposium on New Frontiers and Future Concept ; 2008 ; Albuquerque (New Mexico)


    Published in:

    Publication date :

    2008-01-21


    Size :

    9 pages





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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