[1]官万延,陈玮玮,鹿世化.超临界CO2在螺旋管式冷却器内的传热特性研究[J].南京师范大学学报(工程技术版),2020,20(02):001-6.[doi:10.3969/j.issn.1672-1292.2020.02.0001]
　Guan Wanyan,Chen Weiwei,Lu Shihua.Study on the Heat Transfer Characteristics of Supercritical CO2in Helical Tube Gas Cooler[J].Journal of Nanjing Normal University(Engineering and Technology),2020,20(02):001-6.[doi:10.3969/j.issn.1672-1292.2020.02.0001]
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超临界CO2在螺旋管式冷却器内的传热特性研究
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南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
20卷
期数:
2020年02期
页码:
001-6
栏目:
动力工程及工程热物理
出版日期:
2020-05-15

文章信息/Info

Title:
Study on the Heat Transfer Characteristics of Supercritical CO2in Helical Tube Gas Cooler
文章编号:
1672-1292(2020)02-0001-06
作者:
官万延; 陈玮玮; 鹿世化
南京师范大学能源与机械工程学院,江苏 南京 210023
Author(s):
Guan Wanyan; Chen Weiwei; Lu Shihua
School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210023,China
关键词:
超临界CO2; 螺旋管; 气体冷却器; 传热特性
Keywords:
supercritical CO2; helical tube; gas cooler; heat transfer characteristics
分类号:
TK124; TK11+4
DOI:
10.3969/j.issn.1672-1292.2020.02.0001
文献标志码:
A
摘要:
螺旋管结构紧凑、换热效率高,在CO2气体冷却器中应用广泛. 超临界CO2热物性变化剧烈,其在螺旋管内的传热特性异常复杂. 通过对不同冷却热流密度和质量流速工况下的数值模拟发现,螺旋管内超临界CO2传热系数沿流动方向呈近似抛物线分布; 冷却热流密度越大,传热系数峰值越高,出现峰值的流动转角越小; 质量流速越大,传热系数峰值越高,出现峰值的流动转角越大; 不同热流密度与质量流速的比值决定整个流动方向传热系数的涨落,基于此提出了一个适用于均匀冷却螺旋管内超临界CO2传热计算的关联式,可为螺旋管式气体冷却器的优化与设计提供参考.
Abstract:
With compact structure and high heat exchange efficiency,helical tube is widely used in CO2 gas cooler. The thermophysical properties of supercritical CO2 change dramatically which makes the heat transfer characteristics of supercritical CO2 in helical tubes more complicated. Through the numerical simulation of different conditions of cooling heat flux and mass flux,it is found that the distribution of heat transfer coefficient of supercritical CO2 in the helical tube is approximately parabolic along the flow direction. The peak value of heat transfer coefficient(PV-HTC)increases with the increase of cooling heat flux,while where the PV-HTC appeared,the flow swirl angle shows the opposite tendency. The PV-HTC increases with the increase of mass flux,and where PV-HTC appeared,the flow swirl angle shows the same tendency. Since the ratio of heat flux to mass flux determines the distribution of heat transfer coefficient along the flow direction,a correlation suitable for supercritical CO2 heat transfer calculation in uniformly cooled helical tube is proposed,which can provide a reference for optimization and design of helical tube gas cooler.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2020-03-27.
基金项目:江苏省自然科学基金项目(BK20180732)、中国博士后科学基金项目(2018M632332)、江苏省高校自然科学基金项目(18KJB470017).
通讯作者:陈玮玮,博士,讲师,研究方向:超临界流体传热. E-mail:chenweiwei@njnu.edu.cn
更新日期/Last Update: 2020-05-15