Experimental study of the heat transfer coefficient deterioration during Density Wave Oscillations

被引：30

作者：

Sorum, Mikkel ^{[1
]}

Dorao, Carlos A. ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Energy & Proc Engn, Trondheim, Norway

来源：

CHEMICAL ENGINEERING SCIENCE | 2015年 / 132卷

关键词：

R134a; Horizontal; Density Wave Oscillations; Two phase flow oscillations; Boiling; Heat transfer coefficient; 2-PHASE FLOW INSTABILITIES; PRESSURE-DROP; DYNAMIC INSTABILITIES; TUBE; FLUX;

D O I：

10.1016/j.ces.2015.03.039

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The effect of the Density Wave Oscillations (DWO) on the heat transfer is studied experimentally. A horizontal test section of 5 mm I.D with R134a as working fluid was used for the experiments. The time averaged boiling heat transfer was found to be different under DWO conditions than under steady-state flow. Four different cases were studied considering different inlet pressure, temperature and mass Row rate. It was observed that the occurrence of the DWO can result in a premature dry out and that the impact of the DWO on the heat transfer depends on the particular conditions. However for the studied cases the impact on the heat transfer was not severe. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：194 / 201

页数：8

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