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Journal of Enhanced Heat Transfer
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ISSN Druckformat: 1065-5131
ISSN Online: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2011002709
pages 43-52

A STUDY OF HEAT TRANSFER IN HEAT PIPE EVAPORATORS WITH METAL FIBER CAPILLARY STRUCTURES

Anatoliy G. Kostornov
I. N. Frantsevich Institute for the Problems of Materials Science, National Academy of Sciences of Ukraine, Kiev, Ukraine
Andrey A. Shapoval
I. N. Frantsevich Institute for the Problems of Materials Science, National Academy of Sciences of Ukraine, Kiev, Ukraine
M. J. Lalor
Liverpool John Moores University, General Engineering Research Institute, United Kingdom
O. Mgaloblishvili
Liverpool John Moores University, General Engineering Research Institute, United Kingdom
J.C. Legros
Universite Libre de Bruxelles, Microgravity Research Center, Av. Roosevelt 50, B-1050 Brussels, Belgium

ABSTRAKT

This paper reports a detailed investigation into the influence of the structural and hydrodynamic characteristics of metal fiber capillary structures (CS) when such materials are used in the construction of heat pipe and thermosyphon evaporators. The study investigates parameters such as the heat transfer coefficient a and the critical heat flux for these materials when operating under conditions corresponding to those encountered in heat evaporators. This research has been performed using dedicated experimental equipment simulating the operating conditions of heat pipes and thermosyphons upon boiling of representative working liquids such as distilled water and acetone. A wide range of characteristics have been investigated for metal capillary structures produced from copper and stainless steel fibers: range of CS porosity Θ = 40% to 90%; range of CS thickness δ = 0.2 mm to 10.0 mm; CS skeleton thermal conductivity range λ = 01 W/(m · K) to 70.0 W/(m · K).

REFERENZEN

  1. Kostornov,A.G, PermeableMetalFibrousMaterials.

  2. Kostornov, A. G. , Materials Science of Dispersed and Porous Materials and Alloys.

  3. Kutateladze, S. S. , The Heat Exchange Theory.

  4. Labuntsov, D. A. , The problems of heat exchange during nucleate boiling of liquid.

  5. Tolubinsky, V. I., Mechanism of heat exchange and the relationships for vapor formation in a heat pipe evaporation zone.

  6. Tovbin, M. V., Chalenko, V. G., and Scherbina, L. S., The role of film transfer in the water evaporation process from capillary porous solids.


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