Analysis of fouling characteristic in enhanced tubes using multiple heat and mass transfer analogies

doi:10.1016/j.cjche.2015.07.011

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (11): 1881-1887.DOI: 10.1016/j.cjche.2015.07.011

• 能源、资源与环境技术 • 上一篇下一篇

Analysis of fouling characteristic in enhanced tubes using multiple heat and mass transfer analogies

Zepeng Wang¹, Guanqiu Li², Jingliang Xu³, JinjiaWei⁴, Jun Zeng⁵, Decang Lou⁵, Wei Li²

1 College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China;
2 College of Energy Engineering, Zhejiang University, Hangzhou 310027, China;
3 School of Energy, Power, and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;
4 State Key Laboratory of Multiphase Flow in School Energy and Power Engineering of Xi'an Jiaotong University, Xi'an 710049, China;
5 China Gas Turbine Establishment, 6 Xin-Jun Road, Xidu district, Chengdu, China

收稿日期:2014-06-08 修回日期:2015-06-03 出版日期:2015-11-28 发布日期:2015-12-18
通讯作者: Wei Li
基金资助:
Supported by the National Natural Science Foundation of China (51210011, 51276091), the Research Award Fund for Outstanding Young Scientists in Shandong Province (BS2012CL014), and the Natural Science Foundation of Zhejiang Province, China (Z13E060001).

Analysis of fouling characteristic in enhanced tubes using multiple heat and mass transfer analogies

Zepeng Wang¹, Guanqiu Li², Jingliang Xu³, JinjiaWei⁴, Jun Zeng⁵, Decang Lou⁵, Wei Li²

1 College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China;
2 College of Energy Engineering, Zhejiang University, Hangzhou 310027, China;
3 School of Energy, Power, and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;
4 State Key Laboratory of Multiphase Flow in School Energy and Power Engineering of Xi'an Jiaotong University, Xi'an 710049, China;
5 China Gas Turbine Establishment, 6 Xin-Jun Road, Xidu district, Chengdu, China

Received:2014-06-08 Revised:2015-06-03 Online:2015-11-28 Published:2015-12-18
Contact: Wei Li
Supported by:
Supported by the National Natural Science Foundation of China (51210011, 51276091), the Research Award Fund for Outstanding Young Scientists in Shandong Province (BS2012CL014), and the Natural Science Foundation of Zhejiang Province, China (Z13E060001).

摘要/Abstract

摘要： This paper provides a comprehensive analysis on cooling tower fouling data taken from seven 15.54 mm I.D. helically ribbed, copper tubes and a plain tube at Re = 16000. There are two key processes during fouling formation: fouling deposition and fouling removal, which can be determined by mass transfer and fluid friction respectively. The mass transfer coefficient can be calculated through three analogies: Prandtl analogy, Von-Karman analogy, and Chilton-Colburn analogy. Based on our analyses, Von-Karman analogy is the optimized analogy, which can well predict the formation of cooling tower fouling. Series of semi-theoretical fouling correlations as a function of the product of area indexes and efficiency indexes were developed, which can be applicable to different internally ribbed geometries. The correlations can be directly used to assess the fouling potential of enhanced tubes in actual cooling tower water situations.

关键词: Fouling, Enhanced tube, Turbulent flow, Mass transfer coefficient, Cooling tower water

Abstract: This paper provides a comprehensive analysis on cooling tower fouling data taken from seven 15.54 mm I.D. helically ribbed, copper tubes and a plain tube at Re = 16000. There are two key processes during fouling formation: fouling deposition and fouling removal, which can be determined by mass transfer and fluid friction respectively. The mass transfer coefficient can be calculated through three analogies: Prandtl analogy, Von-Karman analogy, and Chilton-Colburn analogy. Based on our analyses, Von-Karman analogy is the optimized analogy, which can well predict the formation of cooling tower fouling. Series of semi-theoretical fouling correlations as a function of the product of area indexes and efficiency indexes were developed, which can be applicable to different internally ribbed geometries. The correlations can be directly used to assess the fouling potential of enhanced tubes in actual cooling tower water situations.

Key words: Fouling, Enhanced tube, Turbulent flow, Mass transfer coefficient, Cooling tower water

Zepeng Wang, Guanqiu Li, Jingliang Xu, JinjiaWei, Jun Zeng, Decang Lou, Wei Li. Analysis of fouling characteristic in enhanced tubes using multiple heat and mass transfer analogies[J]. Chinese Journal of Chemical Engineering, 2015, 23(11): 1881-1887.

参考文献

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[2] D.Q. Kern, R.A. Seaton, A theoretical analysis of thermal surface fouling, Br. Chem. Eng. 4 (1959) 258-262.

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[8] R.L. Webb, Single-phase heat transfer, friction, and fouling characteristics of threedimensional cone roughness in tube flow, Int. J. Heat Mass Transfer 52 (11) (2009) 2624-2631.

[9] W. Li, The internal surface area basis, a key issue of modeling fouling in enhanced heat transfer tubes, Int. J. Heat Mass Transfer 46 (22) (2003) 4345-4349.

[10] R.L.Webb,W. Li, Fouling in enhanced tubes using cooling tower water: part I: longterm fouling data, Int. J. Heat Mass Transfer 43 (19) (2000) 3567-3578.

[11] W. Zhang, G.Q. Li, Z.J. Zhang, W. Li, Z.M. Xu, Fouling model of internal helical-rib tubes based on Prandtl analogy, Proc. CSEE 28 (35) (2008) 66-70.

[12] S.M. Zubair, A.K. Sheikh, M.N. Shaik, A probabilistic approach to the maintenance of heat-transfer equipment subject to fouling, Energy 17 (8) (1992) 769-776.

[13] R.L. Webb, R. Narayanamurthy, P. Thors, Heat transfer and friction characteristics of internal helical-rib roughness, J. Heat Transf. 122 (1) (2000) 134-142.

[14] G.R. Xia, Q.L. Feng, Simulation of Transfer Phenomenon, 2nd ed. China Petrochemical Press, 1997.

[15] Z.X. Han, Theory of Transfer Process, 1st ed. Zhejiang University Press, 1988.

[16] F.W. Dittus, L.M.K. Boelter, Heat transfer in automobile radiators of the tubular type, Int. Commun. Heat Mass 12 (1) (1985) 3-22.

[17] T.V. Karman, The analogy between fluid friction and heat transfer, Trans. ASME Bd. 61 (1939) 705.

[18] A.P. Colburn, A method of correlating forced convection heat transfer data and a comparison with fluid friction, Trans. Am. Inst. Chem. Eng. 29 (1933) 174-210.

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Analysis of fouling characteristic in enhanced tubes using multiple heat and mass transfer analogies

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