[1] Ji Cuilian, Han Jitian, Liu Xiaopeng, et al. A new heat transfer correlation for flow boilingin helically coiled tubes [J]. Journal of Southeast University (English Edition), 2015, 31 (3): 380-383. [doi:10.3969/j.issn.1003-7985.2015.03.014]

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A new heat transfer correlation for flow boilingin helically coiled tubes()

一种新的螺旋管内流动沸腾传热关联式

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

31

Issue:

2015 3

Page:

380-383

Research Field:

Energy and Power Engineering

Publishing date:

2015-09-20

Info

Title:

A new heat transfer correlation for flow boilingin helically coiled tubes

一种新的螺旋管内流动沸腾传热关联式

Author(s):

Ji Cuilian^{1, 2}, Han Jitian¹, Liu Xiaopeng², Shao Li¹, Chen Changnian¹

¹School of Energy and Power Engineering, Shandong University, Jinan 250061, China
²Municipal and Environmental Engineering Department, Shandong Urban Construction Vocational College, Jinan 250103, China

冀翠莲^{1, 2}, 韩吉田¹, 刘晓鹏², 邵莉¹, 陈常念¹

¹山东大学能源与动力工程学院, 济南 250061; ²山东城市建设职业学院市政与环境工程系, 济南 250103

Keywords:

helically coiled tube;  flow boiling;  heat transfer coefficient correlation;  heat transfer

螺旋管;  流动沸腾;  传热系数关联式;  传热

PACS:

TK121

DOI:

10.3969/j.issn.1003-7985.2015.03.014

Abstract:

Based on the superposition principle of the nucleate boiling and convective heat transfer terms, a new correlation is developed for flow boiling heat transfer characteristics in helically coiled tubes. The effects of the geometric and system parameters on heat transfer characteristics in helically coiled tubes are investigated by collecting large amounts of experimental data and analyzing the heat transfer mechanisms. The existing correlations are divided into two categories, and they are calculated with the experimental data. The D_n factor is introduced to take into account the effect of a complex geometrical structure on flow boiling heat transfer. A new correlation is developed for predicting the flow boiling heat transfer coefficients in the helically coiled tubes, which is validated by the experimental data of R134a flow boiling heat transfer in them; and the average relative error and root mean square error of the new correlation are calculated. The results show that the new correlation agrees well with the experimental data, indicating that the new correlation can be used for predicting flow boiling heat transfer characteristics in the helically coiled tubes.

为了改善螺旋管内流动沸腾换热特性的预测方法, 利用核态沸腾项和对流换热项的叠加原理建立了新的预测关联式.基于收集的大量实验数据和流动沸腾换热机理, 分析螺旋管几何参数和实验参数对流动沸腾传热的影响, 将已经建立的关联式分为2类, 并用大量实验数据对其进行计算.为了考虑复杂管道对传热特性的影响, 在新建立的螺旋管内流动沸腾传热预测关联式中引入了D_n因子.采用以R134a为介质的螺旋管内流动沸腾传热实验数据进行了验证, 并计算新关联式的平均相对误差和均方根误差.结果表明, 新的预测关联式与实验值吻合较好, 可以用于螺旋管流动沸腾传热特性的预测分析.

References:

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Memo

Memo:

Biography: Ji Cuilian(1975—), female, master, associate professor, jicuilian75@163.com.
Foundation item: The National Natural Science Foundation of China(No.50776055, 51076084).
Citation: Ji Cuilian, Han Jitian, Liu Xiaopeng, et al.A new heat transfer correlation for flow boiling in helically coiled tubes[J].Journal of Southeast University(English Edition), 2015, 31(3):380-383.[doi:10.3969/j.issn.1003-7985.2015.03.014]

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