The Influence of the Dimension of Central Tube on Shell-Side Performance of Continuous Helical Baffle Heat Exchanger

Abstract:

Limited by manufacturing technology, there have to be a central tube designed at the center shaft position of CHBSTHX. In this paper, the influence of dimension of central tube on the shell-side performance of the heat exchanger is investigated by means of CFD. Research presents that the pressure drop is greater in central area than that in perimeter zone; the dimension of central tube influences heat transfer and pressure drop limitedly, similar fluid condition provides similar shell-side performance of heat transfer and pressure drop respectively regardless of the dimension of central tube; larger dimension of central tube brings greater drop of the integrated performance of heat exchanger, in the designed dimension, about 3%~4% of integrated performance drop follows the dimension of the central tube increases step by step.

• Periodical: Applied Mechanics and Materials (Volume 328)
• Pages: 960-964
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.328.960
• Online since: June 2013
• Authors: Kun Wang, Wen Jing Du, Shui Ji, Lin Cheng
• Keywords: Central Tube, Heat Exchanger with Continuous Helical Baffle (CHBSTHX), Shell-Side Performance

References

[1] Q. WANG, G. CHEN, Q. CHEN, M. ZENG. Review of Improvements on Shell-and-Tube Heat Exchangers with Helical Baffles. Heat Transfer Engineering, 2010, 31(10):836-853.

DOI: 10.1080/01457630903547602

[2] Peng B T, Wang Q W. An Experiment Study of Shell-and-Tube Heat Exchangers with Continuous Helical Baffles. ASME Journal of Heat Transfer. 2007, 129(10): 1425-1431.

DOI: 10.1115/1.2754878

[3] Yong-Gang Lei, Ya-Ling He. Efforts of baffle inclination angle on flow and heat transfer of a heat exchanger with helical baffles. Chemical Engineering and Processing. 2008, 47: 2336-2345.

DOI: 10.1016/j.cep.2008.01.012

[4] Jian-Fei Zhang, Ya-Ling He, Wen-Quan Tao. 3D numerical simulation on shell-and-tube heat exchangers with middle-overlapped helical baffles and continuous baffles – Part II: Simulation results of periodic model and comparison between continuous and non-continuous helical baffles. Int J Heat & Mass T, 2009, 52: 5381-5389.

DOI: 10.1016/j.ijheatmasstransfer.2009.07.007

[5] S. JI, W. DU, L. CHENG. Numerical simulation on Heat Exchanger with Continuous Helical Baffles, Journal of Engineering Thermo physics, 2010, 31(4): 651-654.

[6] S. JI, W. DU, L. CHENG. Numerical Investigate of Heat Transfer and Flowing Characteristic on the shell side of Heat Exchanger with Continuous Helical Baffles, Journal of Electronics Engineering, 2009, 29(32): 66-70.

DOI: 10.1115/ihtc14-22250

[7] Q. WANG, L. LUO. Shell-side heat transfer and pressure drop of shell-and-tube heat exchanger with overlap helical baffles. Journal of Chemical Engineering, 2005, 56(4): 598-601.

DOI: 10.1080/01457639408939830

[8] Wenquan TAO. Numerical Heat Transfer, Second Edition. Xi'an Jiaotong University Press. 2001, 5: 337-340.

[9] Victor Yakhot, Steven A. Orszag. Renormalization group analysis of turbulence. I. Basic theory. Journal of Scientific Computing, 1986, 1(1):3-51.

DOI: 10.1007/bf01061452

[10] ANSYS Release 12.0 CFX-Solver Theory Guide. ANSYS Inc. 2009, section Eddy Viscosity Turbulence Models, section Documentation Conventions.