[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()

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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

Author(s):

Ji Cuilian¹;  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

Keywords:

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

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.

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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