A NEW PRESSURE-DROP CORRELATION FOR SUBCOOLED FLOW BOILING OF REFRIGERANTS

被引：21
作者：
HAHNE, E
SPINDLER, K
SKOK, H
机构：
[1] Institut für Thermodynamik und Wärmetechnik, Universität Stuttgart, D-70550 Stuttgart
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 1993年 / 36卷 / 17期
关键词：
D O I：
10.1016/0017-9310(93)90089-O
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Pressure drop data from experiments on subcooled flow boiling of refrigerant R12 and R134a have been correlated. A wide range of pressures (8-20 bar), mass fluxes (750-3000 kg s(-1) m(-2)), subcooling temperatures (2-47.6 K) and heat fluxes (up to 207 500 W m(-2)) has been considered. The new correlation for the reduced pressure drop (sum of frictional and accelerational component) is a function of the boiling number and the Jakob number. The ratio of heated and wetted perimeter of the flow channel is included in the correlation so that it is applicable for both tubes and annuli. With the exception of six out of a total of 326 experimental data points all data lie within +/-25% around the correlation.
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页码：4267 / 4274
页数：8
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