A. S. Surtaev, A. N. Pavlenko, V. I. Kalita, D. V. Kuznetsov, D. I. Komlev, A. A. Radyuk, A. Yu. Ivannikov, “The influence of three-dimensional capillary-porous coatings on heat transfer at liquid boiling”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 2016, Volume 42, Issue 8,Pages <nobr>1

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The influence of three-dimensional capillary-porous coatings on heat transfer at liquid boiling

A. S. Surtaev^a, A. N. Pavlenko^a, V. I. Kalita^b, D. V. Kuznetsov^a, D. I. Komlev^b, A. A. Radyuk^b, A. Yu. Ivannikov^b

^a S.S. Kutateladze Institute of Thermophysics, Siberian Division of the Russian Academy of Sciences
^b Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences

Abstract: The process of heat transfer at pool boiling of liquid (Freon R21) on tubes with three-dimensional plasma-deposited capillary-porous coatings of various thicknesses has been experimentally studied. Comparative analysis of experimental data showed that the heat transfer coefficient for a heater tube with a 500-$\mu$m-thick porous coating is more than twice as large as that in liquid boiling on an otherwise similar uncoated tube. At the same time, no intensification of heat exchange in the regime of bubble boiling is observed on a tube with a 100-$\mu$m-thick porous coating.

Keywords: Heat Transfer, Heat Transfer Coefficient, Heat Transfer Rate, Technical Physic Letter, Heat Flux Density.

Received: 30.06.2015