Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2859
Title: Coiled flow inverter as a heat exchanger
Authors: Kumar V.
Mridha M.
Gupta A.K.
Nigam K.D.P.
Published in: Chemical Engineering Science
Abstract: In the present work attempts are made to investigate the hydrodynamics and heat-transfer characteristics of a coiled flow inverter (CFI) as heat exchanger at the pilot plant scale. The experiments are carried out in counter-current mode operation with hot fluid in the tube side and cold fluid in the shell side. Experimental study is made over a range of Reynolds numbers from 1000 to 16,000 using water in the tube side of the heat exchanger. The shell side fluids used are either cooling water or ambient air. The coiled flow inverter is made up of coils and 90{ring operator} bends and inserted in a closed shell. The shell side is fitted with three types of baffles to provide high turbulence and avoid channeling in the shell side. The bulk mean temperatures at various downstream positions are reported for different flow rate on tube side, as well as the heat transfer efficiency of the heat exchanger is also reported. Pressure drop and overall heat-transfer coefficient is calculated at various tube and shell side process conditions. The outer and inner heat-transfer coefficients are determined using Wilson plot technique. The results show that at low Reynolds numbers, heat-transfer is 25% higher as compared to coiled tubes. At high Reynolds numbers, the configuration has less influence on heat transfer. New empirical correlations are developed for hydrodynamic and heat-transfer predictions in the coiled flow inverter. © 2007 Elsevier Ltd. All rights reserved.
Citation: Chemical Engineering Science (2007), 62(9): 2386-2396
URI: https://doi.org/10.1016/j.ces.2007.01.032
http://repository.iitr.ac.in/handle/123456789/2859
Issue Date: 2007
Keywords: Bends
Coiled flow inverter (CFI)
Coiled tube
Friction factor
Heat transfer
ISSN: 92509
Author Scopus IDs: 7404634425
23089200400
57209589337
22980653700
Author Affiliations: Kumar, V., Department of Chemical Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
Mridha, M., Department of Chemical Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
Gupta, A.K., Department of Chemical Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
Nigam, K.D.P., Department of Chemical Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
Funding Details: The authors gratefully acknowledge the Ministry of Chemical and Fertilizers, GOI, India for funding the project.
Corresponding Author: Nigam, K.D.P.; Department of Chemical Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India; email: nigamkdp@gmail.com
Appears in Collections:Journal Publications [CH]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.