Effects of confinement and pressure on critical heat flux during natural convective boiling in vertical channels

被引:60
作者
Bonjour, J
Lallemand, M
机构
[1] Centre de Thermique, URA CNRS 1372 INSA, 69621 Villeurbanne Cedex, 20, avenue Albert Einstein
关键词
D O I
10.1016/S0735-1933(97)00005-5
中图分类号
O414.1 [热力学];
学科分类号
摘要
An experimental study has been carried out for the critical heat flux (CHF) during the natural convective boiling of R-113 at various pressures in a vertical channel. The pressure ranges from 1 to 3 bar and the channel gap-size from 0.3 mm to 2.5 mm as its height is kept constant. Data for pool boiling are also obtained. At all pressures investigated, the CHF decreases as the gap-size is reduced. On the other hand, for this pressure range, an increase in CHF is observed with increasing pressure. Nevertheless, one has to notice that this last trend is not so pronounced for narrow as for wide channels. The effect of pressure cannot compensate the decrease in CHF due to the channel gap-size reduction. A previously published correlation for the CHF in such systems is modified so as to take into account the influence of pressure. It is in good agreement with the experimental data since its accuracy is always better than 5 %. (C) 1997 Elsevier Science Ltd.
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页码:191 / 200
页数:10
相关论文
共 12 条
[1]  
CARVALHO RDM, 1994, INT HEAT TRANSF C BR, V5, P31
[2]  
CICHELLI MT, 1945, T AM INST CHEM ENG, V41, P755
[3]   NUCLEATE BOILING HEAT-TRANSFER AND CRITICAL HEAT-FLUX IN NARROW SPACE BETWEEN RECTANGULAR SURFACES [J].
FUJITA, Y ;
OHTA, H ;
UCHIDA, S ;
NISHIKAWA, K .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1988, 31 (02) :229-239
[4]  
Jensen M.K., 1976, AICHE S SERIES, V73, P205
[5]  
JENSEN MK, 1976, AICHE S SERIES, V73, P164
[6]  
JOMARD T, 1991, THESIS INSA LYON
[7]  
KUTATELADZE SS, 1950, ZH TEKH FIZ+, V20, P1389
[8]   CRITICAL HEAT-FLUX DURING NATURAL CONVECTIVE BOILING IN VERTICAL RECTANGULAR CHANNELS SUBMERGED IN SATURATED LIQUID [J].
MONDE, M ;
KUSUDA, H ;
UEHARA, H .
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1982, 104 (02) :300-303
[9]  
Nakayama W., 1986, Applied Mechanics Reviews, V39, P1847, DOI [10.1115/1.3149515, DOI 10.1115/1.3149515]
[10]  
Rohsenow W.M., 1973, . Handbook of Heat Transfer