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Journal of Enhanced Heat Transfer
Fator do impacto: 0.562 FI de cinco anos: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN Imprimir: 1065-5131
ISSN On-line: 1026-5511

Volumes:
Volume 26, 2019 Volume 25, 2018 Volume 24, 2017 Volume 23, 2016 Volume 22, 2015 Volume 21, 2014 Volume 20, 2013 Volume 19, 2012 Volume 18, 2011 Volume 17, 2010 Volume 16, 2009 Volume 15, 2008 Volume 14, 2007 Volume 13, 2006 Volume 12, 2005 Volume 11, 2004 Volume 10, 2003 Volume 9, 2002 Volume 8, 2001 Volume 7, 2000 Volume 6, 1999 Volume 5, 1998 Volume 4, 1997 Volume 3, 1996 Volume 2, 1995 Volume 1, 1994

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v25.i6.20
pages 465-564

CHOICE AND JUSTIFICATION OF THE HEAT TRANSFER INTENSIFICATION METHODS

Yury A. Kuzma-Kichta
Moscow Power Engineering Institute Moscow, Russia
Alexander I. Leontiev
Institute of mechanics of Lomonosov Moscow State University, 1 Michurinski pr., Moscow 119192, Russia; Bauman Moscow State Technical University, ul. Baumanskaya 2-ya, 5/1, Moscow 105005, Russia

RESUMO

The methods of heat and mass transfer enhancement have been widely applied in the element of power equipment. The most popular methods of heat and mass transfer enhancement under convection are the use of the entry section effect, artificial flow agitation in the wall layer or over the entire flow section by circular or spiral grooves, dimples, finned surfaces, twisted tapes, screws and coiled pipes, jet impingement of heat carrier on a surface, porous and brush inserts, effect of ultrasonic vibrations, the influence of wall intensifiers of heat removal on laminar-flow heat transfer. To intensify heat transfer in boiling, extensive use is made of porous coatings, since the methods of artificial flow agitation are less efficient here. The enhancement of heat transfer in condensation is achieved by creating drop condensation, whereas in case of film condensation, knurling, finning, and alteration of the slope of the surface are employed to enhance heat transfer. Combined methods of heat transfer intensification are based on the use of at least two methods of increasing the heat removal intensity. For example,
– the use of artificial roughness of the surface and of a twisted tape;
– the use of helical pipe and of porous coating;
– the use of circular knurling and flow twisting in helical pipes.
The enhancement of heat and mass transfer make it possible to improve the equipment characteristics. Incorporation of grids-intensifiers into the structure of fuel assemblies made it possible to increase the power of energy block by a factor of 1.5. This new edition the survey of investigations in the field of heat and mass transfer enhancement on the macro-, micro-, and nanoscales. The available investigations into heat transfer and hydrodynamics of dimpled surfaces are considered in detail. Consideration is given on the thermohydrodynamics on the micro- and nanoscales: heat transfer under condensation on macro- and microrough surfaces, heat transfer with boiling on surfaces with porous coating and protrusions that form a homogeneous relief, heat transfer in the presence of convection in micro channels, the appearance of slipping on the wall in liquid flow over an ultrahydrofobic surface, the influence of molecular layers of surfactant formed on surfaces on the hydraulic resistance of pipelines.


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