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Analysis of in-R12 CHF data: influence of hydraulic diameter and heating length; test of Weisman boiling crisis model; Analyse de donnees de flux critique en R12: influence du diametre hydraulique et de la longueur chauffante; test du modele de Weisman

Technical Report:

Abstract

In order to progress on the comprehensive modelling of the boiling crisis phenomenon, Electricite de France (EDF), Commissariat a l`Energie Atomique (CEA) and FRAMATOME have set up experimental programs involving in-R12 tests: the EDF APHRODITE program and the CEA-EDF-FRAMATOME DEBORA program. The first phase in these programs aims to acquire critical heat flux (CHF) data banks, within large thermal-hydraulic parameter ranges, both in cylindrical and annular configurations, and with different hydraulic diameters and heating lengths. Actually, three data banks have been considered in the analysis, all of them concerning in-R12 round tube tests: - the APHRODITE data bank, obtained at EDF with a 13 mn inside diameter, - the DEBORA data bank, obtained at CEA with a 19.2 mm inside diameter, - the KRISTA data bank, obtained at KfK with a 8 mm inside diameter. The analysis was conducted using CHF correlations and with the help of an advanced mathematical tool using pseudo-cubic thin plate type Spline functions. Two conclusions were drawn: -no influence of the heating length on our CHF results, - the influence of the diameter on the CHF cannot be simply expressed by an exponential function of this parameter, as thermal-hydraulic parameters also have an influence. Some  More>>
Publication Date:
Sep 01, 1993
Product Type:
Technical Report
Report Number:
EDF-93-NB-00148
Reference Number:
SCA: 420400; PA: AIX-26:037410; EDB-95:058805; ERA-20:013381; NTS-95:021843; SN: 95001373189
Resource Relation:
Other Information: PBD: Sep 1993
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; CRITICAL HEAT FLUX; FREONS; P CODES; THERMAL REACTORS; CEA; ELECTRICITE DE FRANCE; HYDRAULICS; SPLINE FUNCTIONS; THERMODYNAMICS
OSTI ID:
31301
Research Organizations:
Electricite de France (EDF), 92 - Clamart (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE95625102; TRN: FR9500945037410
Availability:
INIS; OSTI as DE95625102
Submitting Site:
FRN
Size:
18 p.
Announcement Date:
Apr 28, 1995

Technical Report:

Citation Formats

Czop, V, Herer, C, Souyri, A, and Garnier, J. Analysis of in-R12 CHF data: influence of hydraulic diameter and heating length; test of Weisman boiling crisis model; Analyse de donnees de flux critique en R12: influence du diametre hydraulique et de la longueur chauffante; test du modele de Weisman. France: N. p., 1993. Web.
Czop, V, Herer, C, Souyri, A, & Garnier, J. Analysis of in-R12 CHF data: influence of hydraulic diameter and heating length; test of Weisman boiling crisis model; Analyse de donnees de flux critique en R12: influence du diametre hydraulique et de la longueur chauffante; test du modele de Weisman. France.
Czop, V, Herer, C, Souyri, A, and Garnier, J. 1993. "Analysis of in-R12 CHF data: influence of hydraulic diameter and heating length; test of Weisman boiling crisis model; Analyse de donnees de flux critique en R12: influence du diametre hydraulique et de la longueur chauffante; test du modele de Weisman." France.
@misc{etde_31301,
title = {Analysis of in-R12 CHF data: influence of hydraulic diameter and heating length; test of Weisman boiling crisis model; Analyse de donnees de flux critique en R12: influence du diametre hydraulique et de la longueur chauffante; test du modele de Weisman}
author = {Czop, V, Herer, C, Souyri, A, and Garnier, J}
abstractNote = {In order to progress on the comprehensive modelling of the boiling crisis phenomenon, Electricite de France (EDF), Commissariat a l`Energie Atomique (CEA) and FRAMATOME have set up experimental programs involving in-R12 tests: the EDF APHRODITE program and the CEA-EDF-FRAMATOME DEBORA program. The first phase in these programs aims to acquire critical heat flux (CHF) data banks, within large thermal-hydraulic parameter ranges, both in cylindrical and annular configurations, and with different hydraulic diameters and heating lengths. Actually, three data banks have been considered in the analysis, all of them concerning in-R12 round tube tests: - the APHRODITE data bank, obtained at EDF with a 13 mn inside diameter, - the DEBORA data bank, obtained at CEA with a 19.2 mm inside diameter, - the KRISTA data bank, obtained at KfK with a 8 mm inside diameter. The analysis was conducted using CHF correlations and with the help of an advanced mathematical tool using pseudo-cubic thin plate type Spline functions. Two conclusions were drawn: -no influence of the heating length on our CHF results, - the influence of the diameter on the CHF cannot be simply expressed by an exponential function of this parameter, as thermal-hydraulic parameters also have an influence. Some calculations with Weisman and Pei theoretical boiling crisis model have been compared to experimental values: fairly good agreement was obtained, but further study must focus on improving the modelling of the influence of pressure and mass velocity. (authors). 12 figs., 4 tabs., 21 refs.}
place = {France}
year = {1993}
month = {Sep}
}