Pool boiling heat transfer outside horizontal tubes at higher heat flux

JI Wentao; ZHANG Dingcai; ZHAO Chuangyao; HE Yaling; TAO Wenquan

doi:10.11949/j.issn.0438-1157.20160706

您当前的位置：

首页 >

文章列表页 >

Pool boiling heat transfer outside horizontal tubes at higher heat flux

更新时间：2025-12-10

- Pool boiling heat transfer outside horizontal tubes at higher heat flux
- CIESC Journal Issue S1, Pages: 28-32(2016)
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院, 热流科学与工程教育部重点实验室,陕西,西安,710049
  2. 中原工学院能源与环境学院,河南,郑州,450007
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160706
  CLC： K124
- Online First：31 August 2016，
  
  Published：31 August 2016
- 稿件说明：
移动端阅览
JI Wentao, ZHANG Dingcai, ZHAO Chuangyao, et al. Pool boiling heat transfer outside horizontal tubes at higher heat flux[J]. CIESC Journal, 2016, (S1): 28-32.
DOI：

JI Wentao, ZHANG Dingcai, ZHAO Chuangyao, et al. Pool boiling heat transfer outside horizontal tubes at higher heat flux[J]. CIESC Journal, 2016, (S1): 28-32. DOI： 10.11949/j.issn.0438-1157.20160706.

摘要

在制冷空调的满液式蒸发器中，制冷剂在壳侧沸腾蒸发，管内为水的单相对流传热。实验研究了高热通量下R134a在一根光管和一根强化管（No.1）外的池沸腾传热，并将光管实验结果和Cooper公式进行了比较。在不同的饱和温度下，热通量10～250 kW·m-2的范围内，研究了R134a在光管和强化管外的沸腾传热系数随热通量的变化关系。光管和强化管外径分别为15.93 mm 和 25.36 mm。通过研究发现，在热通量10～250 kW·m-2的范围内，光管的池沸腾传热系数和Cooper公式符合较好，偏差小于±15%。在双对数坐标下传热系数和热通量实验结果拟合直线斜率为0.67。在较高热通量，即热通量大于250 kW·m-2时，光管的传热系数相对Cooper公式偏差开始增大。对于高效管，在小于40 kW·m-2热通量下的传热效果最好。强化管的强化倍率随热通量增加一直减小，在较高热通量250 kW·m-2下，强化管的传热系数和光管相同，甚至比光管小。

Abstract

For the flooded evaporator in refrigeration or air conditioning systems

refrigerant is boiling on the shell side and water is flowing in the tube side. The pool boiling heat transfer coefficient of R134a outside one smooth tube and one reentrant cavity enhanced tube No.1 is investigated with an experimental approach. At the saturate temperature of 6

10 and 16℃

the heat flux of 10-250 kW·m-2

the heat transfer coefficient versus heat flux of smooth tube is investigated and compared with Cooper correlation. The external diameter of smooth tube and enhanced tube are 15.93 mm and 25.36 mm

respectively. At the heat flux of 10-250 kW·m-2

it is found that the deviation of experimental result and Cooper correlation is within ±15%. the average value of m in h∝qm

is 0.67. For the enhanced tube

the enhanced ratio is the largest at the heat flux less than 40 kW·m-2. The enhanced ratio is decreasing as the increment of heat flux. At the heat flux larger than 250 kW·m-2

the heat transfer coefficient of enhanced tube is approaching the smooth tube

and even smaller than smooth tube.

关键词

Keywords

references

Views

1186

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Effect of evaporation temperature on boiling heat transfer in horizontal ribbed and embossing finned tube pool

Study on enhanced pool boiling heat transfer based on self-driven jet device

Study on heat transfer and flow instability in open microchannels

Heat dissipation performance of single server immersion jet liquid cooling system

Investigation of enhanced boiling heat transfer on porous structural surfaces by high voltage electric field

Related Author

ZHANG Jili

CHEN Jingdong

MA Zhixian

WANG Yonghui

SU Zeshi

GAO Ming

ZUO Qirong

DONG Wuhan

Related Institution

Faculty of Infrastructure Engineering, Dalian University of Technology

School of Energy and Power Engineering, University of Shanghai for Science and Technology

State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University

College of Urban Construction, Nanjing Tech University

School of Energy and Power Engineering, Jiangsu University

⁰