Shell and tube heat exchanger (STHX) is a class of indirect contact heat exchangers which has wide applications in various industries. In this paper, the shell-side performance characteristics of a small STHX with differently notched continuous helical baffle (CHB) geometries are numerically studied and compared with same CHB without notched regions. The indentations are uniquely produced by placing the notch near the core of the heat exchanger, thereby conferring the flow with low-pressure drop regions. Two set of models of inner notched continuous helical baffle (ICHB), i.e., ICHB1 and ICHB2, are studied with notch width of about 5% and 10% of the inner shell diameter of the same heat exchanger. In comparison with the CHBSTHX, it is seen that the STHXs incorporated with ICHBs, the heat transfer rate dropped slightly, but a significant decrease in pressure drop is observed. It is found that the heat transfer coefficient to pressure drop ratio for ICBH1 and ICHB2 shows significant increase in comprehensive performance of about 3.5% and 32.42%, respectively, when compared with same CHB without notched regions.
Issue Section:
Research Papers
References
1.
Peng
, B.
, Wang
, Q. W.
, and Zhang
, C.
, 2007
, “An Experimental Study of Shell and Tube Heat Exchangers With Continuous Helical Baffles
,” ASME J. Heat Transfer
, 129
(10
), pp. 1425
–1431
.2.
Wenjing
, D. U.
, Hongfu
, W.
, and Lin
, C.
, 2014
, “Effects of Shape and Quantity of Helical Baffles on the Shell Side Heat Transfer and Flow Performance of Heat Exchanger
,” Chin. J. Chem. Eng.
, 22
(3
), pp. 243
–251
.3.
Wang
, Q. W.
, Chen
, G. D.
, Xu
, J.
, and Ji
, Y. P.
, 2010
, “Second-Law Thermodynamic Comparison and Maximal Velocity Ratio Design of Shell-and-Tube Heat Exchangers With Continuous Helical Baffles
,” ASME J. Heat Transfer
, 132
(10
), p. 101801
.4.
Ozden
, E.
, and Tari
, I.
, 2010
, “Shell Side CFD Analysis of a Small Shell-and-Tube Heat Exchanger
,” Energy Conv. Manage.
, 51
(5
), pp. 1004
–1014
.5.
Wen
, J.
, Yang
, H.
, Wang
, H.
, Xue
, Y.
, and Tong
, X.
, 2015
, “Experimental Investigation on Performance Comparison for Shell-and-Tube Heat Exchangers With Different Baffles
,” Int. J. Heat Mass Transfer
, 84
, pp. 990
–997
.6.
Kral
, D.
, Stehlik
, P.
, Van Der Ploeg
, H. J.
, and Masters
, B. I.
, 1996
, “Helical Baffles in Shell-and-Tube Heat Exchangers, Part I: Experimental Verification
,” Heat Transfer Eng.
, 17
(1
), pp. 93
–101
.7.
Van Der Ploeg
, H. J.
, and Masters
, B. I.
, 1997
, “A New Shell-and-Tube Option for Refineries
,” Pet. Technol. Q.
, 2
(3
), pp. 91
–95
.8.
Movassag
, S. Z.
, Taher
, F. N.
, Razmi
, K.
, and Azar
, R. T.
, 2013
, “Tube Bundle Replacement for Segmental and Helical Shell and Tube Heat Exchangers: Performance Comparison and Fouling Investigation on the Shell Side
,” Appl. Therm. Eng.
, 51
(1–2
), pp. 1162
–1169
.9.
Yang
, J.
, Ma
, L.
, Bock
, J.
, Jacobi
, A. M.
, and Liu
, W.
, 2014
, “A Comparison of Four Numerical Modeling Approaches for Enhanced Shell-and-Tube Heat Exchangers With Experimental Validation
,” Appl. Therm. Eng.
, 65
(1–2
), pp. 369
–383
.10.
You
, Y.
, Fan
, A.
, Huang
, S.
, and Liu
, W.
, 2012
, “Numerical Modeling and Experimental Validation of Heat Transfer and Flow Resistance on the Shell Side of a Shell-and-Tube Heat Exchanger With Flower Baffles
,” Int. J. Heat Mass Transfer
, 55
(25–26
), pp. 7561
–7569
.11.
Zhang
, L.
, Xia
, Y.
, Jiang
, B.
, Xiao
, X.
, and Yang
, X.
, 2013
, “Pilot Experimental Study on Shell and Tube Heat Exchangers With Small-Angles Helical Baffles
,” Chem. Eng. Process.
, 69
, pp. 112
–118
.12.
Zhang
, J. F.
, Li
, B.
, Huang
, W. J.
, Lei
, Y. G.
, He
, Y. L.
, and Tao
, W. Q.
, 2009
, “Experimental Performance Comparison of Shell-Side Heat Transfer for Shell-and-Tube Heat Exchangers With Middle-Overlapped Helical Baffles and Segmental Baffles
,” Chem. Eng. Process.
, 64
(8
), pp. 1643
–1653
.13.
Shinde
, S. K.
, and Pancha
, M. H.
, 2012
, “Comparative Thermal Performance Analysis of Segmental Baffle Heat Exchanger With Continuous Helical Baffle Heat Exchanger Using Kern Method
,” Int. J. Eng. Res. Appl.
, 2
(4
), pp. 2264
–2271
.14.
Gowthaman
, P. S.
, and Sathish
, S.
, 2014
, “Analysis of Segmental and Helical Baffle in Shell and Tube Heat Exchanger
,” Int. J. Curr. Eng. Technol.
, 2
, pp. 625
–628
.15.
Lunsford
, K. M.
, 1998
, “Increasing Heat Exchanger Performance
,” Hydrocarbon Engineering
, Bryan Research & Engineering, Inc., Bryan, TX, pp. 1
–13
.16.
Master
, B. I.
, Chunangad
, K. S.
, and Pushpanathan
, V.
, 2003
, “Fouling Mitigation Using Helixchanger Heat Exchangers
,” Heat Exchanger Fouling Cleaning Fundam. Appl.
, 43
, pp. 1
–6
.17.
Stehlík
, P.
, Němčanský
, J.
, Kral
, D.
, and Swanson
, L. W.
, 1994
, “Comparison of Correction Factors for Shell-and-Tube Heat Exchangers With Segmental or Helical Baffles
,” Heat Transfer Eng.
, 15
(1
), pp. 55
–65
.18.
Lei
, Y. G.
, He
, Y. L.
, Li
, R.
, and Gao
, Y. F.
, 2008
, “Effects of Baffle Inclination Angle on Flow and Heat Transfer of a Heat Exchanger With Helical Baffles
,” Chem. Eng. Process.
, 47
(12
), pp. 2336
–2345
.19.
Chen
, G.
, Zeng
, M.
, Wang
, Q.
, and Qi
, S.
, 2010
, “Numerical Studies on Combined Parallel Multiple Shell-Pass Shell-and-Tube Heat Exchangers With Continuous Helical Baffles
,” Chem. Eng. Trans.
, 21
, pp. 229
–234
.20.
Yang
, J. F.
, Zeng
, M.
, and Wang
, Q. W.
, 2015
, “Numerical Investigation on Combined Single Shell-Pass Shell-and-Tube Heat Exchanger With Two-Layer Continuous Helical Baffles
,” Int. J. Heat Mass Transfer
, 84
, pp. 103
–113
.21.
Zhnegguo
, Z.
, Tao
, X.
, and Xiaoming
, F.
, 2004
, “Experimental Study on Heat Transfer Enhancement of a Helically Baffled Heat Exchanger Combined With Three-Dimensional Finned Tubes
,” Appl. Therm. Eng.
, 24
(14–15
), pp. 2293
–2300
.22.
Wang
, S.
, Wen
, J.
, Yang
, H.
, Xue
, Y.
, and Tuo
, H.
, 2014
, “Experimental Investigation on Heat Transfer Enhancement of a Heat Exchanger With Helical Baffles Through Blockage of Triangle Leakage Zones
,” Appl. Therm. Eng.
, 67
(1–2
), pp. 122
–130
.23.
Gao
, B.
, Bi
, Q.
, Nie
, Z.
, and Wu
, J.
, 2015
, “Experimental Study of Effects of Baffle Helix Angle on Shell-Side Performance of Shell-and-Tube Heat Exchangers With Discontinuous Helical Baffles
,” Exp. Therm. Fluid Sci.
, 68
, pp. 48
–57
.24.
Zhang
, J. F.
, Guo
, S. L.
, Li
, Z. Z.
, Wang
, J. P.
, He
, Y. L.
, and Tao
, W. Q.
, 2013
, “Experimental Performance Comparison of Shell-and-Tube Oil Coolers With Overlapped Helical Baffles and Segmental Baffles
,” Appl. Therm. Eng.
, 58
(1–2
), pp. 336
–343
.25.
Zhang
, J. F.
, He
, Y. L.
, and Tao
, W. Q.
, 2009
, “3D Numerical Simulation on Shell and Tube Heat Exchangers With Middle-Overlapped Helical Baffles and Continuous Baffles. Part I: Numerical Model and Results of Whole Heat Exchanger With Middle-Overlapped Helical Baffles
,” Int. J. Heat Mass Transfer
, 52
(23–24
), pp. 5371
–5380
.26.
Zhang
, J. F.
, He
, Y. L.
, and Tao
, W. Q.
, 2009
, “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 Transfer
, 52
(23–24
), pp. 5381
–5389
.27.
Incropera
, F. P.
, and Dewitt
, D. P.
, 1996
, Fundamentals of Heat & Mass Transfer
, 5th ed., Wiley
, New York
.28.
Kapale
, U. C.
, and Chand
, S.
, 2006
, “Modeling for Shell-Side Pressure Drop for Liquid Flow in Shell-and-Tube Heat Exchanger
,” Int. J. Heat Mass Transfer
, 49
(3–4
), pp. 601
–610
.Copyright © 2016 by ASME
You do not currently have access to this content.
