ライブラリ登録: Guest
Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集
Journal of Enhanced Heat Transfer
インパクトファクター: 0.562 5年インパクトファクター: 0.605 SJR: 0.211 SNIP: 0.361 CiteScore™: 0.33

ISSN 印刷: 1065-5131
ISSN オンライン: 1026-5511

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v8.i6.40
pages 397-409

Dryout Location in a Low-Porosity Volumetrically Heated Particle Bed

Ivan V. Kazachkov
Department of Energy Technology, Royal Institute of Technology, Brinellvagen 60,100 44 Stockholm, Sweden
M. J. Konovalikhin
Division of Nuclear Power Safety, Royal Institute of Technology, Stockholm, Sweden
Bal Raj Sehgal
Nuclear Power Safety, Royal Institute of Technology, 100 44 STOCKHOLM, Sweden

要約

A mathematical model for the description of flow of a compressible fluid (steam) through the volumetrically heated porous bed with particular consideration of the nonthermal local equilibrium is formulated and solved numerically using the split step method. It is shown that initial thermodynamic perturbations, if they grow, will lead to a temperature escalation at a specific location. Furthermore, the data from the RIT (Royal Institute of Technology) POMECO (porous media coolability) experiments are used for the validation of the model.
Experimental investigation of the coolability of heat-generating porous beds, named POMECO, was performed. The subject of this investigation was the dryout heat flux as the limiting parameter for the steady state removal of the generated heat by boiling of the coolant. Focus was placed on low porosity, small particle size, and relatively large scale debris beds. In the debris bed, downcomer(s) of different configurations were built which would channel the water from the water overlayer to the bottom of the bed and develop a two-phase natural circulation flow loop, providing greater mass flow rate in the bed. A database on the enhancement of dryout heat flux by downcomers was obtained for low porosity uniform and stratified beds with heat addition of up to 1 MW/m3.


Articles with similar content:

EFFECT OF ROD BUNDLE GEOMETRY(EVEN-ODD)ON BURNOUT
International Heat Transfer Conference 7, Vol.9, 1982, issue
E.H.K. Akaho, F. P. Berger
Enhanced Boiling Heat Transfer from Silicon Chips with Micro-Pin Fins Immersed in FC-72
Journal of Enhanced Heat Transfer, Vol.10, 2003, issue 2
Hiroshi Takamatsu, Hiroshi Honda, Jin Jia Wei
The Effect of the Diameter in Convective Boiling of Refrigerant R-134a
International Heat Transfer Conference 13, Vol.0, 2006, issue
J. M. Saiz Jabardo, Paulo Eduardo Lopes Barbieri
EXPERIMENTAL DATA ON CHF FOR FORCED CONVECTION WATER BOILING IN LONG HORIZONTAL CAPILLARY TUBES
International Heat Transfer Conference 10, Vol.20, 1994, issue
Alfonso Niro, G. P. Beretta, Adriano Maria Lezzi
Effect of Fouling on Stability of Bioconvection of Gyrotactic Microorganisms in a Porous Medium
Journal of Porous Media, Vol.8, 2005, issue 1
A. A. Avramenko