Experimental Studies on Flow Boiling of R134a in Horizontal Small Tubes

Ding Yang; Liu Jianhua; Ye Fangping; Jiang Linlin; E Xiaoxue; Wu Hao

doi:10.3969/j.issn.0253-4339.2015.01.090

您当前的位置：

首页 >

文章列表页 >

Experimental Studies on Flow Boiling of R134a in Horizontal Small Tubes

更新时间：2024-07-18

- Experimental Studies on Flow Boiling of R134a in Horizontal Small Tubes
- Journal of Refrigeration Vol. 36, Issue 1, (2015)
- 作者机构：
  
  1. 上海理工大学能源与动力工程学院
  2. 浙江新劲空调设备有限公司
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2015.01.090
  CLC：
- Published：2015
- 稿件说明：
移动端阅览
Ding Yang, Liu Jianhua, Ye Fangping, et al. Experimental Studies on Flow Boiling of R134a in Horizontal Small Tubes[J]. Journal of refrigeration, 2015, 36(1).
DOI：

Ding Yang, Liu Jianhua, Ye Fangping, et al. Experimental Studies on Flow Boiling of R134a in Horizontal Small Tubes[J]. Journal of refrigeration, 2015, 36(1). DOI： 10.3969/j.issn.0253-4339.2015.01.090.

摘要

本文对R134a在水平微细管内的流动沸腾进行了实验研究。实验测试段选用了内径为1 mm、2 mm、3 mm共3种不同的水平光滑不锈钢管，实验的饱和温度为5~30 ℃，热流密度为2~70 kW/m2，流量范围为200~1500 kg/(m2s)。实验结果表明：相同条件下，干涸前2 mm管较3 mm管换热系数平均增幅为11.6%，1 mm管较2 mm管换热增幅为26.3%，1 mm管径换热系数比3 mm管径平均增大40.8%。随着管径的减小，换热系数在更低的干度开始减小，质量流速和强制对流蒸发作用对换热系数的影响变小，热流密度的影响依然显著；塞状流和弹状流区域减小，泡状流和环状流区域增大。

Abstract

Experimental investigation on the flow boiling of R134a in horizontal mini-channels was carried out in this study. The test sections are three different horizontal smooth stainless steel tubes with inner diameter of 1mm

2mm and 3mm. The experiment was performed on the saturated temperatures ranging from 5 to 30 ℃

heat fluxes from 2 to 70 kW/m2 and mass fluxes from 200 to 1500 kg/(m2s). The results indicated that on the same conditions the pre-dryout heat transfer coefficients in 2-mm-ID tube increased 11.6% averagely than the 3-mm-ID tube

the coefficients in 1-mm-ID tube increased 26.3% averagely than the 2-mm-ID tube and the heat transfer coefficients in the 1-mm-ID tube were 40.8% greater in average than those in the 3-mm-ID tube. With decreasing tube diameter the coefficients started decreasing at lower vapor quality

the effect of mass flux and the contribution of forced convective evaporation on the local heat transfer coefficient decreased while the effect of heat flux was still strong in all three tubes

the zone of plug flow and slug flow decreased while the zone of bubbly flow and annular flow increased.

关键词

Keywords

references

Views

2109

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Review on Dryout of CO2 During Flow Boiling Heat Transfer

Characteristics of Heat Transfer for CO2 Flow Boiling in Mini-channel

Investigation of Frictional Pressure Drop During Flow Boiling of R1234ze(E) in Horizontal Tub

Experimental Study on Flow Boiling Heat Transfer Characteristics of R513A Inside Horizontal Tubes

Experimental Study on Flow Boiling Heat Transfer and Pressure Drop Characteristics of R245fa in a Dimpled Flat Tube

Related Author

Zhang Liang

Ge Qilin

Yang Jianchao

An Shouchao

Jiang Linlin

Liu Jianhua

Ye Fangping

Zhang Liang

Related Institution

Refrigeration Technology Institute, University of Shanghai for Science and Technology

Zhejiang Xinjin Air Conditioning Equipment Co., Ltd.

Institute of Refrigeration and Cryogenic Engineering, University of Shanghai for Science and Technology

Haier Group Technology Research Center

Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering

Address：10/F, Yindu Mansion, 67 Fucheng Road, Haidian Dist, Beijing, China Postal code：100142
Tel：010-68711412 Email：editor@car.org.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09064830号-19 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰