Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers

doi:10.1016/S1004-9541(14)60041-0

Chinese Journal of Chemical Engineering ›› 2014, Vol. 22 ›› Issue (3): 243-251.DOI: 10.1016/S1004-9541(14)60041-0

• 流体力学与传递现象 • 下一篇

Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers

杜文静, 王红福, 程林

Institute of Thermal Science & Technology, Shandong University, Jinan 250061, China

收稿日期:2013-06-08 修回日期:2013-10-05 出版日期:2014-03-28 发布日期:2014-03-05
通讯作者: CHENG Lin
基金资助:
Supported by the National Natural Science Foundation of China (51106090), the National Key Basic Research Program of China (2013CB228305) and the Independent Innovation Foundation of Shandong University (2012TS190).

Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers

DU Wenjing, WANG Hongfu, CHENG Lin

Institute of Thermal Science & Technology, Shandong University, Jinan 250061, China

Received:2013-06-08 Revised:2013-10-05 Online:2014-03-28 Published:2014-03-05
Contact: CHENG Lin
Supported by:
Supported by the National Natural Science Foundation of China (51106090), the National Key Basic Research Program of China (2013CB228305) and the Independent Innovation Foundation of Shandong University (2012TS190).

摘要/Abstract

摘要： Shape and quantity of helical baffles have great impact on the shell-side performance of helical baffled heat exchangers (HBHE). In this work, three physical models of HBHE with baffles of different shape (trisection, quadrant and sextant sector) were investigated. Numerical simulations were performed on HBHE at three helix angles (10°, 25° and 40°) by the software ANSYS CFX. Analyses of numerical results indicate that the sextant HBHE shows relatively better fluid flow performance because the leakage flow in the triangle area is evidently reduced and the fluid streamline appears much closer to an ideal spiral flow, while the trisection and quadrant HBHE show more scattered and disordered streamline distributions. The convective heat transfer coefficient and pressure drop in three types of HBHE were presented. Further investigations on the shell side performance with different helical baffles were implemented by the field synergy theory. Both theoretical and numerical analyses gave support on the relations between helical baffle shape and shell-side performance. This paper may provide useful reference for the selection of baffle shape and quantity in HBHE.

关键词: helical baffled heat exchanger, trisection, quadrant, sextant, field synergy principle

Abstract: Shape and quantity of helical baffles have great impact on the shell-side performance of helical baffled heat exchangers (HBHE). In this work, three physical models of HBHE with baffles of different shape (trisection, quadrant and sextant sector) were investigated. Numerical simulations were performed on HBHE at three helix angles (10°, 25° and 40°) by the software ANSYS CFX. Analyses of numerical results indicate that the sextant HBHE shows relatively better fluid flow performance because the leakage flow in the triangle area is evidently reduced and the fluid streamline appears much closer to an ideal spiral flow, while the trisection and quadrant HBHE show more scattered and disordered streamline distributions. The convective heat transfer coefficient and pressure drop in three types of HBHE were presented. Further investigations on the shell side performance with different helical baffles were implemented by the field synergy theory. Both theoretical and numerical analyses gave support on the relations between helical baffle shape and shell-side performance. This paper may provide useful reference for the selection of baffle shape and quantity in HBHE.

Key words: helical baffled heat exchanger, trisection, quadrant, sextant, field synergy principle

杜文静, 王红福, 程林. Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers[J]. Chinese Journal of Chemical Engineering, 2014, 22(3): 243-251.

DU Wenjing, WANG Hongfu, CHENG Lin. Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers[J]. Chin.J.Chem.Eng., 2014, 22(3): 243-251.

参考文献

1 Bell, K., "Heat exchanger design for the process industries", J. Heat Transfer, 126 (6), 877-885 (2004).

2 Mater, B.I., Chunangad, K.S., Boxma, A.J., "Most frequently used heat exchangers from pioneering research to worldwide applications", Heat Transfer Eng., 27 (6), 4-11 (2006).

3 Stehlik, P., Wadekar, V.V., "Different strategies to improve industrial heat exchanger", Heat Transfer Eng., 23 (6), 36-48 (2002).

4 Li, H.D., Kottke, V., "Visualization and determination of local heat transfer coefficients in shell-and-tube heat exchangers for staggered tube arrangement by mass transfer measurements", Exp. Therm. Fluid Sci., 17 (3), 210-216 (1998).

5 Reppich, M., Zagermann, S., "A new design method for segmental baffled heat exchangers", Comp. Chem. Eng., 19, 137-142 (1995).

6 Soltan, B.K., Saffar-Avval, M., Damangir, E., "Minimization of capital and operating costs of shell and tube condensers using optimum baffle spacing", Appl. Therm. Eng., 24 (17–18), 2801-2810 (2004).

7 Lutcha, J., Nemcansky, J., "Performance improvement of tubular heat exchangers by helical baffles", Trans. IChemE., 68A, 263-270 (1990).

8 Andrews, M., Master, B.I., "Three-dimensional modeling of a helix heat exchanger using CFD", Heat Transfer Eng., 26 (6), 22-31 (2005).

9 Wang, Q.W., Chen, G.D., Chen, Q.Y., "Review of improvements on shell-and-tube heat exchangers with helical baffles", Heat Transfer Eng., 31 (10), 836-853 (2010).

10 Kral, D., Stelik, P., Vander, P.H., "Helical baffles in shell-and-tube heat exchangers, part one: Experimental verification", Heat Transfer Eng., 17 (1), 93-101 (1996).

11 Li, Y.G., He, Y.L., Li, R., "Effect of baffle inclination angle on flow and heat transfer of a heat exchanger with helical baffles", Chem. Eng. Process., 47, 2336-2345 (2008).

12 Jafari Nasr, M.R., Shafeghat, A., "Fluid flow analysis and extension of rapid design algorithm for helical baffle heat exchanger", Appl. Therm. Eng., 28, 1324-1332 (2008).

13 Zhang, J.F., Li, B., Huang, W.J., "Experimental performance comparison of shell-side heat transfer for shell-and-tube heat exchangers with middle-overlapped helical baffles and segmental baffles", Chem. Eng. Sci., 64, 1643-1653 (2009).

14 Taher, F.N., Movassag, S.E., Razmi, K., "Baffle space impact on the performance of helical baffle shell and tube heat exchangers", Appl. Therm. Eng., 44, 143-149 (2012).

15 Wang, L., Luo, L.Q., Wang, Q.W., "Effect of inserting block plates on pressure drop and heat transfer in shell-and-tube heat exchangers with helical baffles", J. Eng. Therm., 22, 173-176 (2001). (in Chinese)

16 Dong, C., Chen, Y.P., Wu, J.F., "Water to water heat transfer on shell-side of trisection helical baffle heat exchangers", J. Chem. Ind. Eng., 63 (3), 721-727 (2012). (in Chinese)

17 Wang, W.H., Chen, Y.P., Wu, J.F., "Numerical simulation of flow field and temperature field in shell side of trisection helix heat exchangers", J. Eng. Therm., 33 (1), 131-134 (2012). (in Chinese)

18 Chen, Y.P., Sheng. Y.J., Dong, C., "Numerical simulation on flow field in circumferential overlap trisection helical baffle heat exchanger", Appl. Therm. Eng., 50, 1035-1043 (2013).

19 Cao, X., "Theoretical analysis and experimental study of shell-and-tube heat exchanger with continuous helical baffles and overlapped helical baffles", Ph.D. Thesis, Shandong University, China (2012). (in Chinese)

20 Yakhot, V., Orszag, S.A., "Renormalization group analysis of turbulence Ⅰ: Basic theory", J. Sci. Comp., 1, 3-11 (1996).

21 Tao, W.Q., Numerical Heat Transfer, 2nd edition, Xi'an Jiaotong University Press, Xi'an, China (2001). (in Chinese)

22 Yakhot, V., Smith, L., "The renormalization group, the ε-expansion and derivation of turbulence models", J. Sci. Comp., 7 (1), 35-61 (1992).

23 Guo, Z.Y., Li, Z.X., Zhou, S.Q., "Principle of uniformity of temperature difference field in exchanger", Sci. China E, 36 (1), 68-75 (1996).

24 Guo, Z.Y., Zhou, S.Q., Li, Z.X., Chen, L.G., "Theoretical analysis and experimental confirmation of the uniformity principle of temperature difference field in heat exchanger", Int. J. Heat Mass Transfer, 45, 2119-2127 (2002).

25 Li, Z.X., Xiong, D.X., Zhou, S.Q., "Analytical and numerical study on the university of temperature difference field in heat exchangers", J. Therm. Sci., 4 (2), 104-108 (1995).

26 Guo, Z.Y., Li D.Y., Wang B.X., "A novel concept for convective heat transfer enhancement", Int. J. Heat Mass Transfer, 41, 2221-2225 (1998).

27 Tao, W.Q., He, Y.L., Wang, Q.W., "A unified analysis on enhancing single phase convective heat transfer with field synergy principle", Int. J. Heat Mass Transfer, 45, 4871-4879 (2002).

28 Guo, Z.Y., Tao, W.Q., Shah, R.K., "The field synergy (coordination) principle and its applications in enhancing single phase convective heat transfer", Int. J. Heat Mass Transfer, 48, 1797-1807 (2005).

29 Li, Z.X., Guo, Z.Y., The Field Synergy Theory of Convection Heat Transfer Optimization, Beijing Press, Beijing, 62-72 (2010). (in Chinese)

30 He, Y.L., Lei, Y.G., Tian, L.T., "An analysis of three-field synergy on heat transfer augmentation with low penalty of pressure drop", J. Eng. Therm., 30 (11), 1904-1906 (2009). (in Chinese)

[1]	Yaping Chen, Hongling Tang, Jiafeng Wu, Huaduo Gu, Shifan Yang. Performance comparison of heat exchangers using sextant/trisection helical baffles and segmental ones[J]. 中国化学工程学报, 2019, 27(12): 2892-2899.
[2]	Cong Dong, Yaping Chen, Jiafeng Wu . Comparison of heat transfer performances of helix baffled heat exchangers with different baffle configurations[J]. Chinese Journal of Chemical Engineering, 2015, 23(1): 255-261.

Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers

Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers

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