Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2852
Title: Augmentation of heat transfer performance in coiled flow inverter vis-à-vis conventional heat exchanger
Authors: Mandal M.M.
Kumar V.
Nigam K.D.P.
Published in: Chemical Engineering Science
Abstract: In the present work, primarily two studies were carried out to ascertain the performance of coiled flow inverter (CFI) as heat exchanger at pilot plant scale. In the first study, performance of CFI heat exchanger has been compared with conventional heat exchangers, i.e. shell and tube heat exchanger (SHE) and plate type heat exchanger (PHE) under identical heat transfer area and process conditions. Experiments were conducted with water flowing under laminar flow regime within the flow range of 30-300 kg/h in the tube side of SHE and PHE. Friction factor and Nusselt number calculated from present experimental study in SHE and PHE were compared with the experimental data previously reported for CFI heat exchanger (Kumar et al., 2007). The Number of Transfer units (NTU) calculated in the present study for CFI was nearly 3.7-7.5 times higher as compared to SHE and 2-2.5 times higher as compared to PHE. In the second part of the study, experiments were performed first time to investigate the pressure drop and heat transfer of compressed air flowing under turbulent flow condition in CFI heat exchanger at pilot plant scale. Hot air at elevated pressures (10-30 kg/cm2) in the tube side of CFI heat exchanger with flow range 3×104<NRe<1.4×105 was cooled by either cooling water or ambient air. The friction factor and Nusselt number values for compressed air flowing in the CFI were also compared with the experimental data reported in the literature for coiled tube at ambient conditions. On the basis of experimental results, new correlations for friction factor and Nusselt number of compressed air flowing under turbulent flow condition in CFI heat exchanger have been developed. © 2009 Elsevier Ltd. All rights reserved.
Citation: Chemical Engineering Science (2010), 65(2): 999-1007
URI: https://doi.org/10.1016/j.ces.2009.09.053
http://repository.iitr.ac.in/handle/123456789/2852
Issue Date: 2010
Keywords: Coiled flow inverter heat exchanger
Heat transfer
Hydrodynamics
Transport processes
Turbulence
ISSN: 92509
Author Scopus IDs: 57197984711
7404634425
22980653700
Author Affiliations: Mandal, M.M., Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India
Kumar, V., Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India
Nigam, K.D.P., Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 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, 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.