JSME International Journal Series B Fluids and Thermal Engineering
Online ISSN : 1347-5371
Print ISSN : 1340-8054
ISSN-L : 1340-8054
Pressure Drop and Heat Transfer for Flow-Boiling of Water in Small-Diameter Tubes
Masatoshi KURETAToshiyuki KOBAYASHIKaichiro MISHIMAHideaki NISHIHARA
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1998 Volume 41 Issue 4 Pages 871-879

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Abstract

Pressure drop and heat transfer for flow-boiling of water in small-diameter tubes under atmospheric pressure were discussed. The results of experiments were compared with those of several existing correlations and models. The experiments were carried out using atmospheric-pressure water in tubes with inner diameter D ranging from 2.0 to 6.0mm, heated length L from 4.0 to 680.0mm, inlet water subcooling ΔTin from 70 to 90 K, and mass velocity G from 100 to 10170kg / (m2s). The highest heat flux q attained was 33 MW / m2. Interesting phenomena were observed in small-diameter tubes with a very short heated length. The most suitable correlations for predicting the pressure drop and heat transfer in small-diameter tubes were also discussed.

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© The Japan Society of Mechanical Engineers
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