Numerical and Experimental Studies on Heat Transfer Enhancement in a Circular Tube Inserted with Twisted Tape Inserts

Haoxu Liu; Guowei Zheng; Changzhong Man; Ke Jiang; Xiaogang Lv

doi:doi:10.11648/j.ajee.20210902.12

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Numerical and Experimental Studies on Heat Transfer Enhancement in a Circular Tube Inserted with Twisted Tape Inserts

Haoxu Liu, Guowei Zheng, Changzhong Man, Ke Jiang, Xiaogang Lv

Published in American Journal of Energy Engineering (Volume 9, Issue 2)

Received: 15 April 2021 Accepted: Published: 24 May 2021

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Abstract

Numerical simulations and experiments are carried out in this paper to research about characteristics of heat transfer, frictional resistance and comprehensive performance of turbulent water flow (3000 < Re < 10,000) in a circular tube with twisted tape inserts. A new type of twisted tape is proposed and it shows excellent performance on heat transfer enhancement. Effects of three parameters including twist ratio (p/w=3, 4, 5), geometrical structure of alternation of clockwise and counterclockwise, existence of semicircular cuts are researched in simulations. The results show that lower twist ratio and the geometrical structure of alternation of clockwise and counterclockwise can enhance heat transfer while the existence of semicircular cuts can significantly reduce flow resistance. Experiments are conducted to validate the actual effect of the twisted tapes and the experimental results are basically consistent with the simulation results. Nusselt number and friction factor with the new type of twisted tape inserts are respectively 1.66-2.42 times and 4.36-4.97 times to that of plain tube while the maximum value of PEC (performance evaluation criteria) reaches 1.42 in experiments. The results of simulations and experiments indicate that the new type of twisted tape has a distinct advantage on heat transfer enhancement. Verification between simulations and experiments are carried out. The result shows that all deviations of corresponding values between simulations and experiments are within 15%, which reflects that the numerical predications are basically in agreement with the experiment results. Finally, a comparative analysis was carried out with the new type of twisted tape in this paper and the different twisted tapes in the previous research. The new type of twisted tape proposed in this paper has higher Nusselt number and friction coefficient.

Published in	American Journal of Energy Engineering (Volume 9, Issue 2)
DOI	10.11648/j.ajee.20210902.12
Page(s)	30-40
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Numerical Simulations, Heat Transfer Enhancement, Twisted Tape, Twist Ratio

References

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[5]	Varun, M. O. Garg, Himanshu Nautiyal, Sourabh Khurana, M. K. Shukla, Heat transfer augmentation using twisted tape inserts: A review, Renewable & Sustainable Energy Reviews 63 (2016) 193-225.
[6]	Sivakumar K, Rajan K. Experimental Investigation of Heat Transfer Characteristics in a Circular Tube Fitted with Triangular-Cut Twisted Tape (TCTT) Inserts. 2018.
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[8]	Kosker M, Yilmaz F. The cross-sectional curvature effect of twisted tapes on heat transfer performance [J]. Chemical Engineering and Processing, 2020, 154: 108008.
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APA Style

Haoxu Liu, Guowei Zheng, Changzhong Man, Ke Jiang, Xiaogang Lv. (2021). Numerical and Experimental Studies on Heat Transfer Enhancement in a Circular Tube Inserted with Twisted Tape Inserts. American Journal of Energy Engineering, 9(2), 30-40. https://doi.org/10.11648/j.ajee.20210902.12

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ACS Style

Haoxu Liu; Guowei Zheng; Changzhong Man; Ke Jiang; Xiaogang Lv. Numerical and Experimental Studies on Heat Transfer Enhancement in a Circular Tube Inserted with Twisted Tape Inserts. Am. J. Energy Eng. 2021, 9(2), 30-40. doi: 10.11648/j.ajee.20210902.12

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AMA Style

Haoxu Liu, Guowei Zheng, Changzhong Man, Ke Jiang, Xiaogang Lv. Numerical and Experimental Studies on Heat Transfer Enhancement in a Circular Tube Inserted with Twisted Tape Inserts. Am J Energy Eng. 2021;9(2):30-40. doi: 10.11648/j.ajee.20210902.12

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@article{10.11648/j.ajee.20210902.12,
  author = {Haoxu Liu and Guowei Zheng and Changzhong Man and Ke Jiang and Xiaogang Lv},
  title = {Numerical and Experimental Studies on Heat Transfer Enhancement in a Circular Tube Inserted with Twisted Tape Inserts},
  journal = {American Journal of Energy Engineering},
  volume = {9},
  number = {2},
  pages = {30-40},
  doi = {10.11648/j.ajee.20210902.12},
  url = {https://doi.org/10.11648/j.ajee.20210902.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajee.20210902.12},
  abstract = {Numerical simulations and experiments are carried out in this paper to research about characteristics of heat transfer, frictional resistance and comprehensive performance of turbulent water flow (3000 < Re < 10,000) in a circular tube with twisted tape inserts. A new type of twisted tape is proposed and it shows excellent performance on heat transfer enhancement. Effects of three parameters including twist ratio (p/w=3, 4, 5), geometrical structure of alternation of clockwise and counterclockwise, existence of semicircular cuts are researched in simulations. The results show that lower twist ratio and the geometrical structure of alternation of clockwise and counterclockwise can enhance heat transfer while the existence of semicircular cuts can significantly reduce flow resistance. Experiments are conducted to validate the actual effect of the twisted tapes and the experimental results are basically consistent with the simulation results. Nusselt number and friction factor with the new type of twisted tape inserts are respectively 1.66-2.42 times and 4.36-4.97 times to that of plain tube while the maximum value of PEC (performance evaluation criteria) reaches 1.42 in experiments. The results of simulations and experiments indicate that the new type of twisted tape has a distinct advantage on heat transfer enhancement. Verification between simulations and experiments are carried out. The result shows that all deviations of corresponding values between simulations and experiments are within 15%, which reflects that the numerical predications are basically in agreement with the experiment results. Finally, a comparative analysis was carried out with the new type of twisted tape in this paper and the different twisted tapes in the previous research. The new type of twisted tape proposed in this paper has higher Nusselt number and friction coefficient.},
 year = {2021}
}

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TY  - JOUR
T1  - Numerical and Experimental Studies on Heat Transfer Enhancement in a Circular Tube Inserted with Twisted Tape Inserts
AU  - Haoxu Liu
AU  - Guowei Zheng
AU  - Changzhong Man
AU  - Ke Jiang
AU  - Xiaogang Lv
Y1  - 2021/05/24
PY  - 2021
N1  - https://doi.org/10.11648/j.ajee.20210902.12
DO  - 10.11648/j.ajee.20210902.12
T2  - American Journal of Energy Engineering
JF  - American Journal of Energy Engineering
JO  - American Journal of Energy Engineering
SP  - 30
EP  - 40
PB  - Science Publishing Group
SN  - 2329-163X
UR  - https://doi.org/10.11648/j.ajee.20210902.12
AB  - Numerical simulations and experiments are carried out in this paper to research about characteristics of heat transfer, frictional resistance and comprehensive performance of turbulent water flow (3000 < Re < 10,000) in a circular tube with twisted tape inserts. A new type of twisted tape is proposed and it shows excellent performance on heat transfer enhancement. Effects of three parameters including twist ratio (p/w=3, 4, 5), geometrical structure of alternation of clockwise and counterclockwise, existence of semicircular cuts are researched in simulations. The results show that lower twist ratio and the geometrical structure of alternation of clockwise and counterclockwise can enhance heat transfer while the existence of semicircular cuts can significantly reduce flow resistance. Experiments are conducted to validate the actual effect of the twisted tapes and the experimental results are basically consistent with the simulation results. Nusselt number and friction factor with the new type of twisted tape inserts are respectively 1.66-2.42 times and 4.36-4.97 times to that of plain tube while the maximum value of PEC (performance evaluation criteria) reaches 1.42 in experiments. The results of simulations and experiments indicate that the new type of twisted tape has a distinct advantage on heat transfer enhancement. Verification between simulations and experiments are carried out. The result shows that all deviations of corresponding values between simulations and experiments are within 15%, which reflects that the numerical predications are basically in agreement with the experiment results. Finally, a comparative analysis was carried out with the new type of twisted tape in this paper and the different twisted tapes in the previous research. The new type of twisted tape proposed in this paper has higher Nusselt number and friction coefficient.
VL  - 9
IS  - 2
ER  -

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Author Information

Haoxu Liu

Internal Combustion Engine Research Institute, Dalian University of Technology, Dalian, China
Guowei Zheng

Internal Combustion Engine Research Institute, Dalian University of Technology, Dalian, China
Changzhong Man

Internal Combustion Engine Research Institute, Dalian University of Technology, Dalian, China
Ke Jiang

Internal Combustion Engine Research Institute, Dalian University of Technology, Dalian, China
Xiaogang Lv

Internal Combustion Engine Research Institute, Dalian University of Technology, Dalian, China

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APA Style

Haoxu Liu, Guowei Zheng, Changzhong Man, Ke Jiang, Xiaogang Lv. (2021). Numerical and Experimental Studies on Heat Transfer Enhancement in a Circular Tube Inserted with Twisted Tape Inserts. American Journal of Energy Engineering, 9(2), 30-40. https://doi.org/10.11648/j.ajee.20210902.12

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ACS Style

Haoxu Liu; Guowei Zheng; Changzhong Man; Ke Jiang; Xiaogang Lv. Numerical and Experimental Studies on Heat Transfer Enhancement in a Circular Tube Inserted with Twisted Tape Inserts. Am. J. Energy Eng. 2021, 9(2), 30-40. doi: 10.11648/j.ajee.20210902.12

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AMA Style

Haoxu Liu, Guowei Zheng, Changzhong Man, Ke Jiang, Xiaogang Lv. Numerical and Experimental Studies on Heat Transfer Enhancement in a Circular Tube Inserted with Twisted Tape Inserts. Am J Energy Eng. 2021;9(2):30-40. doi: 10.11648/j.ajee.20210902.12

Copy | Download

@article{10.11648/j.ajee.20210902.12,
  author = {Haoxu Liu and Guowei Zheng and Changzhong Man and Ke Jiang and Xiaogang Lv},
  title = {Numerical and Experimental Studies on Heat Transfer Enhancement in a Circular Tube Inserted with Twisted Tape Inserts},
  journal = {American Journal of Energy Engineering},
  volume = {9},
  number = {2},
  pages = {30-40},
  doi = {10.11648/j.ajee.20210902.12},
  url = {https://doi.org/10.11648/j.ajee.20210902.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajee.20210902.12},
  abstract = {Numerical simulations and experiments are carried out in this paper to research about characteristics of heat transfer, frictional resistance and comprehensive performance of turbulent water flow (3000 < Re < 10,000) in a circular tube with twisted tape inserts. A new type of twisted tape is proposed and it shows excellent performance on heat transfer enhancement. Effects of three parameters including twist ratio (p/w=3, 4, 5), geometrical structure of alternation of clockwise and counterclockwise, existence of semicircular cuts are researched in simulations. The results show that lower twist ratio and the geometrical structure of alternation of clockwise and counterclockwise can enhance heat transfer while the existence of semicircular cuts can significantly reduce flow resistance. Experiments are conducted to validate the actual effect of the twisted tapes and the experimental results are basically consistent with the simulation results. Nusselt number and friction factor with the new type of twisted tape inserts are respectively 1.66-2.42 times and 4.36-4.97 times to that of plain tube while the maximum value of PEC (performance evaluation criteria) reaches 1.42 in experiments. The results of simulations and experiments indicate that the new type of twisted tape has a distinct advantage on heat transfer enhancement. Verification between simulations and experiments are carried out. The result shows that all deviations of corresponding values between simulations and experiments are within 15%, which reflects that the numerical predications are basically in agreement with the experiment results. Finally, a comparative analysis was carried out with the new type of twisted tape in this paper and the different twisted tapes in the previous research. The new type of twisted tape proposed in this paper has higher Nusselt number and friction coefficient.},
 year = {2021}
}

Copy | Download

TY  - JOUR
T1  - Numerical and Experimental Studies on Heat Transfer Enhancement in a Circular Tube Inserted with Twisted Tape Inserts
AU  - Haoxu Liu
AU  - Guowei Zheng
AU  - Changzhong Man
AU  - Ke Jiang
AU  - Xiaogang Lv
Y1  - 2021/05/24
PY  - 2021
N1  - https://doi.org/10.11648/j.ajee.20210902.12
DO  - 10.11648/j.ajee.20210902.12
T2  - American Journal of Energy Engineering
JF  - American Journal of Energy Engineering
JO  - American Journal of Energy Engineering
SP  - 30
EP  - 40
PB  - Science Publishing Group
SN  - 2329-163X
UR  - https://doi.org/10.11648/j.ajee.20210902.12
AB  - Numerical simulations and experiments are carried out in this paper to research about characteristics of heat transfer, frictional resistance and comprehensive performance of turbulent water flow (3000 < Re < 10,000) in a circular tube with twisted tape inserts. A new type of twisted tape is proposed and it shows excellent performance on heat transfer enhancement. Effects of three parameters including twist ratio (p/w=3, 4, 5), geometrical structure of alternation of clockwise and counterclockwise, existence of semicircular cuts are researched in simulations. The results show that lower twist ratio and the geometrical structure of alternation of clockwise and counterclockwise can enhance heat transfer while the existence of semicircular cuts can significantly reduce flow resistance. Experiments are conducted to validate the actual effect of the twisted tapes and the experimental results are basically consistent with the simulation results. Nusselt number and friction factor with the new type of twisted tape inserts are respectively 1.66-2.42 times and 4.36-4.97 times to that of plain tube while the maximum value of PEC (performance evaluation criteria) reaches 1.42 in experiments. The results of simulations and experiments indicate that the new type of twisted tape has a distinct advantage on heat transfer enhancement. Verification between simulations and experiments are carried out. The result shows that all deviations of corresponding values between simulations and experiments are within 15%, which reflects that the numerical predications are basically in agreement with the experiment results. Finally, a comparative analysis was carried out with the new type of twisted tape in this paper and the different twisted tapes in the previous research. The new type of twisted tape proposed in this paper has higher Nusselt number and friction coefficient.
VL  - 9
IS  - 2
ER  -

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