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Analysis of the burn-out mechanism in pool boiling of a dielectric fluid on a single fin
No full textPassive enhancement techniques in pool boiling: analysis of pool boiling and CHF with fins and metallic wire nets
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Valutazioni sulle prestazioni del fluido HCFC141b per il controllo termico bifase di componenti elettronici
No full textIndividuazione e superamento dei limiti termofluidodinamici interni di un termosifone bifase per impieghi geotermici
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Upward and downward heat and mass transfer with miniature periodically operating loop thermosyphons
No full textUpward and downward two-phase heat and mass transfer has been considered in the present paper. The heat and mass transfer with the condenser located below the evaporator has been obtained by inserting an accumulator tank in the liquid line of a loop thermosyphon and enforcing a pressure pulsation. In previous papers these heat transfer devices have been called pulsated two phase thermosyphons (PTPT). A mini PTPT has been experimentally investigated. It has shown a stable periodic heat transfer regime weakly influenced by the position of the condenser with respect to the evaporator. In contrast a classical loop mini thermosyphon (diameter of connecting pipes 4 mm) did not achieve a stable functioning for the investigated level differences between evaporator and condenser lower than 0.37 m. The present study shows that the functioning of a PTPT device does not directly depend on the level difference or the presence of noncondensable gas. In order to obtain a natural circulation in mini or micro loops, a periodically operating heat transfer regime should therefore be considered. © 2004 Elsevier Ltd. All rights reserved
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