Two-phase flow dynamics during boiling of R134a refrigerant in minichannels

被引：0
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作者：
D. M. Khovalyg
A. V. Baranenko
机构：
[1] St. Petersburg National Research University of Information Technologies,
[2] Mechanics,undefined
[3] and Optics,undefined
来源：
Technical Physics | 2015年 / 60卷
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摘要：
This study is devoted to complex experimental investigation of two-phase flow boiling of R134a refrigerant in a minichannel having a hydraulic diameter of 540 μm at heat fluxes up to 70 kW/m2 and mass fluxes up to 700 kg/(m2 s). Flow regimes, pressure drop, heat transfer coefficient, and behavior of instabilities are analyzed as functions of vapor quality. On the basis of experimental data, the methods for calculating two-phase pressure drop in a minichannel with a diameter of about 500 μm are determined, and new correlation is proposed for estimating the heat-transfer coefficient; the region of stable boiling of the refrigerant is also determined.
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页码：350 / 358
页数：8
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