Heat transfer characteristics of supercritical CO<sub>2</sub> cooled in horizontal helically coiled tube

LIU Xinxin; YE Jian; XU Xiaoxiao; LIU Chao; WANG Kaizheng; LI Hongrui; BAI Wanjin

doi:10.11949/j.issn.0438-1157.20161357

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Heat transfer characteristics of supercritical CO₂ cooled in horizontal helically coiled tube

更新时间：2025-11-26

- Heat transfer characteristics of supercritical CO₂ cooled in horizontal helically coiled tube
- CIESC Journal Issue S2, Pages: 120-127(2016)
- 作者机构：
  
  1. 低品位能源利用技术及系统教育部重点实验室, 重庆大学动力工程学院,重庆,400030
  2. 重庆交通大学机电与汽车工程学院,重庆,400074
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161357
  CLC： K124
- Online First：30 December 2016，
  
  Published：30 December 2016
- 稿件说明：
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LIU Xinxin, YE Jian, XU Xiaoxiao, et al. Heat transfer characteristics of supercritical CO₂ cooled in horizontal helically coiled tube[J]. CIESC Journal, 2016, (S2): 120-127. DOI: 10.11949/j.issn.0438-1157.20161357.
DOI：

LIU Xinxin, YE Jian, XU Xiaoxiao, et al. Heat transfer characteristics of supercritical CO₂ cooled in horizontal helically coiled tube[J]. CIESC Journal, 2016, (S2): 120-127. DOI: 10.11949/j.issn.0438-1157.20161357. DOI：

摘要

采用数值模拟和实验结合的方法研究超临界CO2在水平冷却螺旋管内的换热特性。研究了质量流量、热通量及压力对传热系数的影响，并比较了直管和螺旋管在加热和冷却条件下的换热特性。结果表明，与直管相比，螺旋管对换热的强化作用随着质量流量的减小和压力的增加而增加。在相同热通量条件下，螺旋管的冷却换热的传热系数比加热的传热系数高，且由于浮升力的影响，加热条件下传热系数存在较大的振荡。

Abstract

The convection heat transfer characteristics of supercritical CO2 cooled in horizontal helically coiled tube is studied experimentally and numerically.The effects of mass flux

heat flux and pressure on heat transfer for helically coiled tube are analyzed.The comparisons of the heat transfer coefficients are made between the straight tube and the helically coiled tube.And

the heating and cooling conditions for the helically coiled tube are compared.Results show that the heat transfer coefficient is lager in helically coiled tube than straight tube under the same condition.With the decrease of the mass flux and the increase of pressure

the heat transfer enhancement of the helically coiled tube is improved compared to the straight tube.For a given heat flux

the heat transfer coefficients are larger at cooling conditions than that at heating conditions in helically coiled tube.Furthermore

the heat transfer coefficients at heating conditions experience drastically oscillation due to the buoyancy force.

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Heat transfer characteristics of supercritical CO2 cooled in horizontal helically coiled tube

DOI：10.11949/j.issn.0438-1157.20161357

摘要

Abstract

关键词

Keywords

references

Heat transfer characteristics of supercritical CO₂ cooled in horizontal helically coiled tube