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

doi:10.1016/j.cjche.2015.07.011

Chin.J.Chem.Eng. ›› 2015, Vol. 23 ›› Issue (11): 1881-1887.DOI: 10.1016/j.cjche.2015.07.011

• ENERGY, RESOURCES AND ENVIRONMENTAL TECHNOLOGY • Previous Articles Next Articles

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:2015-12-18 Published:2015-11-28
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).

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

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).

Abstract

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

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

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]. Chin.J.Chem.Eng., 2015, 23(11): 1881-1887.

References

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

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

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