Heat Transfer in Boiling of Refrigerant R-21 in a Downward Flow in an Assembly of Minichannels

被引：4

作者：

Kuznetsov, V. V. ^{[1
]}

Dimov, S. V. ^{[1
]}

Shamirzaev, A. S. ^{[1
]}

机构：

[1] Russian Acad Sci, Kutateladze Inst Thermophys, Siberian Branch, Pr Akad Lavrenteva 1, Novosibirsk 630090, Russia

来源：

JOURNAL OF ENGINEERING THERMOPHYSICS | 2017年 / 26卷 / 03期

基金：

俄罗斯科学基金会;

关键词：

EXCHANGERS; MICROCHANNELS;

D O I：

10.1134/S1810232817030055

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The paper presents the results of an experimental study of heat transfer in boiling of refrigerant R-21 in a downward flow in a vertical assembly of minichannels of a plate-fin heat exchanger. Characteristic regimes of vapor-liquid flow and heat transfer coefficients have been obtained for the case of plain fins in the ranges of low mass velocities and heat fluxes that are typical of the industry but poorly studied. The obtained data show no significant dependence of the heat transfer coefficient on the heat flux density and mass velocity, which may be explained by the decisive effect of the evaporation of thin liquid film on the heat transfer at low heat flux density.

引用

页码：353 / 358

页数：6

共 15 条

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