Heat Transfer and Friction Factor in Corrugated Tube
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Abstract
This paper studied the influence of ribbed pitch ratio of a corrugated tube on the heat transfer rate and friction factor characteristics. In the experiments, the test tube having a diameter (D) of 18 mm, rib height (e) of 1.0 mm and three different ribbed pitch to diameter ratios (p/D) of 1.0, 1.5 and 2.0, respectively. Double pipe heat exchanger was used for test section by using cold air as the testing fluid at Reynolds numbers (Re) between 20,000 and 34,000. From the experimental results, It can be observed that the heat transfer rate of the corrugated tube perform higher than those the smooth tube. Heat transfer increased with decreasing ribbed pitch to diameter ratio (p/D) and increasing Reynolds numbers. As friction factor increased with decreasing ribbed pitch to diameter. A corrugated tube with ribbed pitch to diameter of p/D = 1.0 give higher heat transfer rate (Nu) and friction factor (f) than that the smooth tube up to 39.8% and 2.9 time.
Article Details
Copyright @2021 Engineering Transactions
Faculty of Engineering and Technology
Mahanakorn University of Technology
References
M. Li, T.S. Khan, E. Al Hajri, Z.H. Ayub, “Geometric optimization for thermal–hydraulic performance of dimpled enhanced tubes for single phase flow”, Applied Thermal Engineering, Vol. 103, pp. 639–650, 2016.
I.P. Nascimento, E.C. Garcia, Heat transfer performance enhancement in compact heat exchangers by using shallow square dimples in flat tubes, Applied Thermal Engineering, Vol. 96, pp. 659–670, 2016.
J. Chen, H. Müller-Steinhagen, G.G. Duffy, “Heat transfer enhancement in dimpled tubes”, Applied Thermal Engineering, Vol. 21 pp. 535–547, 2001.
Y. Wang, Y.-L. He, Y.-G. Lei, J. Zhang, “Heat transfer and hydrodynamics analysis of a novel dimpled tube”, Experimental Thermal and Fluid Science, Vol. 34, pp. 1273–1281, 2010.
S. Yang, L. Zhang, H. Xu, “Experimental study on convective heat transfer and flow resistance characteristics of water flow in twisted elliptical tubes”, Applied Thermal Engineering, Vol. 31, pp. 2981–2991, 2011.
L. Zhang, S. Yang, H. Xu, “Experimental study on condensation heat transfer characteristics of steam on horizontal twisted elliptical tubes”, Applied Energy Vol. 97, pp. 881–887, 2012.
X.H. Tan, D.S. Zhu, G.Y. Zhou, L.D. Zeng, “Experimental and numerical study of convective heat transfer and fluid flow in twisted oval tubes”, International Journal of Heat and Mass Transfer, Vol. 55, pp. 4701–4710, 2012.
X. Tang, X. Dai, D. Zhu, “Experimental and numerical investigation of convective heat transfer and fluid flow in twisted spiral tube”, International Journal of Heat and Mass Transfer, Vol. 90, pp. 523–541, 2015.
H.J. Park, D.H. Lee, S.W. Ahn, “Study of local heat transfer in a spirally fluted tube”, International Journal Thermal Science, Vol. 64, pp. 257–263, 2012.
Z.G. Zhang, X. Tao, X.M. Fang, “Experimental study on heat transfer enhancement of a helically baffled heat exchanger combined with three-dimensional finned tubes”, Applied Thermal Engineering, Vol. 24, pp. 2293–2300, 2004.
V. Zimparov, “Prediction of friction factors and heat transfer coefficients for turbulent flow in corrugated tubes combined with twisted tape inserts. Part 1: friction factors”, International Journal of Heat and Mass Transfer, Vol. 47, pp. 589-599, 2004.
V. Zimparov, “Prediction of friction factors and heat transfer coefficients for turbulent flow in corrugated tubes combined with twisted tape inserts. Part 2: heat transfer coefficients”, International Journal of Heat and Mass Transfer, Vol. 47, pp. 385-393, 2004.
C. Chen, Y. T. Wu, S. T. Wang and C. F. Ma, “Experimental investigation on enhanced heat transfer in transversally corrugated tube with molten salt”, Experimental Thermal and Fluid Science, Vol. 47, pp. 108-116, 2013.
L. Jianfeng, S. Xiangyang, D. Jing, P. Qiang and W. Yuliang, “Convective heat transfer of high temperature molten salt in transversely grooved tube”, Applied Thermal Engineering, Vol. 61 pp. 157-162, 2013.
W. C. Huang, C. A. Chen, C. Chen and Y. J. San, “Effects of characteristic parameters on heat transfer enhancement of repeated ring-type ribs in circular tubes”, Experimental Thermal and Fluid Science, Vol. 68, pp. 371-380, 2015.
F. Incropera and P.D. Dewitt, Introduction to Heat Transfer, 3rd ed., John Wiley & Sons Inc., 1996.