Characteristics of dryout for CO<sub>2</sub> flow boiling heat transfer in mini-channels

WU Hao; LIU Jianhua; ZHANG Liang; JIANG Linlin; DING Yang; LIANG Yaying

doi:10.11949/j.issn.0438-1157.20141500

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Characteristics of dryout for CO₂ flow boiling heat transfer in mini-channels

更新时间：2025-12-10

- Characteristics of dryout for CO₂ flow boiling heat transfer in mini-channels
- CIESC Journal Issue 5, Pages: 1676-1682(2015)
- 作者机构：
  
  上海理工大学制冷技术研究所,上海,200093
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141500
  CLC： K121TB61+2
- Online First：05 May 2015，
  
  Published：05 May 2015
- 稿件说明：
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WU Hao, LIU Jianhua, ZHANG Liang, et al. Characteristics of dryout for CO₂ flow boiling heat transfer in mini-channels[J]. CIESC Journal, 2015, (5): 1676-1682. DOI: 10.11949/j.issn.0438-1157.20141500.
DOI：

WU Hao, LIU Jianhua, ZHANG Liang, et al. Characteristics of dryout for CO₂ flow boiling heat transfer in mini-channels[J]. CIESC Journal, 2015, (5): 1676-1682. DOI: 10.11949/j.issn.0438-1157.20141500. DOI：

摘要

针对二氧化碳作为制冷剂在微细通道内两相流沸腾换热进行了实验与理论研究

采用红外成像观测与传热系数实验研究

定量与定性地分析了热通量2～35 kW·m-2

饱和温度-10～10℃工况时

内径为1、2、3 mm圆管内的传热系数。实验结果表明:当质量流率增加时干涸起始干度逐渐降低

当质量流率小于临界值时

干涸现象结束之后

传热系数随着质量流率增加基本维持不变

而当质量流率大于临界值时

干涸现象结束之后

随着质量流率增加传热系数相应增加;随着管径增加

干涸发生的质量流率越小

临界热通量越大

同时管径越小传热系数越高。

Abstract

Experimental and theoretical researches were conducted to get the two-phase flow boiling heat transfer characteristics of carbon dioxide as refrigerant in horizontal mini-channels. Based on infrared thermal imaging tests and experimental study on heat transfer coefficients

heat transfer coefficients of carbon dioxide were analyzed qualitatively and quantitatively under following experimental conditions: heat flux 2—35 kW·m-2

saturation temperature -10—15℃

mini-channels inner diameter:1 mm

2 mm or 3 mm. With the increase of mass flow rate

the value of vapor quality decreased gradually when dryout happened. When mass flow rate was below a critical value

heat transfer coefficient almost kept constant with the increase of mass flow rate after dryout. When mass flow rate was above the critical value

heat transfer coefficient gradually increased with the increase of mass flow rate after dryout. With the increase of tube diameter

mass flow rate decreased and the critical value of heat flux increased when dryout happened. With the decrease of tube diameter

coefficient of heat transfer increased.

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Related Institution

State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University

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Shanghai Institute of Metrology and Measurement Technology

School of Environment and Architecture, University of Shanghai for Science and Technology

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Characteristics of dryout for CO2 flow boiling heat transfer in mini-channels

DOI：10.11949/j.issn.0438-1157.20141500

摘要

Abstract

关键词

Keywords

references

Characteristics of dryout for CO₂ flow boiling heat transfer in mini-channels