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Installation for the study of heat transfer with high flux density; Installation d'etude de transmission de chaleur a densite de flux elevee

Abstract

As a result of their very low vapor pressure, metals with a low fusion point (sodium, sodium-potassium alloys, etc.) can be used at high temperature, as heating fluids, in installations whose internal pressure is close to atmospheric pressure. Owing to the very high convection coefficients which can be reached with these fluids and to the large temperature differences utilizable, it is possible to produce through the exchange surfaces considerable heat flux densities, of the order of those which exist through the canning of fuel elements in nuclear reactors. The installation described allowed a flux density of more than 200 W/cm{sup 2} to be obtained, the heating fluid being a Na-K alloy (containing 56 per cent by weight of potassium) brought to a temperature around 550 deg. C. (author) [French] Par suite de leur tres faible pression de vapeur, les metaux a bas point de fusion (sodium, alliages sodium-potassium, etc.) peuvent etre utilises a haute temperature, comme fluides de chauffage, dans des installations dont la pression interne est voisine de la pression atmospherique. Grace aux coefficients de convection tres eleves que ces fluides permettent d'atteindre et aux importantes differences de temperature utilisables, il est possible de produire, a travers les surfaces  More>>
Authors:
Robin, M; Schwab, B [1] 
  1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Publication Date:
Jul 01, 1957
Product Type:
Technical Report
Report Number:
CEA-R-703
Subject:
42 ENGINEERING; CONVECTION; EL-3 REACTOR; FLOW RATE; FLUX DENSITY; FUEL CANS; HEAT FLUX; HEAT TRANSFER FLUIDS; HYPOTHETICAL ACCIDENTS; LIQUID METALS; NAK COOLED REACTORS; POISSON RATIO; POTASSIUM BASE ALLOYS; PRESSURE DROP; REACTOR COOLING SYSTEMS; REYNOLDS NUMBER; SODIUM ALLOYS; TEMPERATURE MEASUREMENT; THERMAL CONDUCTIVITY; THERMAL STRESSES; VAPOR PRESSURE
OSTI ID:
20877818
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR07R0703045531
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
21 pages
Announcement Date:
Jun 15, 2007

Citation Formats

Robin, M, and Schwab, B. Installation for the study of heat transfer with high flux density; Installation d'etude de transmission de chaleur a densite de flux elevee. France: N. p., 1957. Web.
Robin, M, & Schwab, B. Installation for the study of heat transfer with high flux density; Installation d'etude de transmission de chaleur a densite de flux elevee. France.
Robin, M, and Schwab, B. 1957. "Installation for the study of heat transfer with high flux density; Installation d'etude de transmission de chaleur a densite de flux elevee." France.
@misc{etde_20877818,
title = {Installation for the study of heat transfer with high flux density; Installation d'etude de transmission de chaleur a densite de flux elevee}
author = {Robin, M, and Schwab, B}
abstractNote = {As a result of their very low vapor pressure, metals with a low fusion point (sodium, sodium-potassium alloys, etc.) can be used at high temperature, as heating fluids, in installations whose internal pressure is close to atmospheric pressure. Owing to the very high convection coefficients which can be reached with these fluids and to the large temperature differences utilizable, it is possible to produce through the exchange surfaces considerable heat flux densities, of the order of those which exist through the canning of fuel elements in nuclear reactors. The installation described allowed a flux density of more than 200 W/cm{sup 2} to be obtained, the heating fluid being a Na-K alloy (containing 56 per cent by weight of potassium) brought to a temperature around 550 deg. C. (author) [French] Par suite de leur tres faible pression de vapeur, les metaux a bas point de fusion (sodium, alliages sodium-potassium, etc.) peuvent etre utilises a haute temperature, comme fluides de chauffage, dans des installations dont la pression interne est voisine de la pression atmospherique. Grace aux coefficients de convection tres eleves que ces fluides permettent d'atteindre et aux importantes differences de temperature utilisables, il est possible de produire, a travers les surfaces d'echange, des densites de flux de chaleur considerables, de l'ordre de celles qui existent a travers les gaines des elements combustibles des reacteurs nucleaires. L'installation decrite a permis l'obtention d'une densite de flux de plus, de 200 W/cm{sup 2}, le fluide chauffant etant de l'alliage Na-K (a 56 pour cent en poids de potassium) porte a une temperature voisine de 550 deg. C. (auteur)}
place = {France}
year = {1957}
month = {Jul}
}