Title: Performance of co-current and counter-current parallel flow three-fluid heat exchanger due to perturbations in flow

Authors: Sanjay Kumar Singh; Manish Mishra; P.K. Jha

Addresses: Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Uttarakhand 247667, India ' Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Uttarakhand 247667, India ' Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Uttarakhand 247667, India

Abstract: Transient behaviour of co-current and countercurrent parallel flow three-fluid heat exchanger with all the three fluids unmixed, has been numerically investigated for perturbations provided in flow. Results are presented for step change in flow rate of all the three fluids. It has been found that the mean exit temperature is greatly affected due to variation in the flow rate and thereby affecting the rate of heat transfer among the three fluids.

Keywords: finite difference method; flow perturbations; parallel flow; three-fluid heat exchangers; transient behaviour; heat exchanger performance; step change; flow rate; mean exit temperature; heat transfer.

DOI: 10.1504/IJGEI.2016.076342

International Journal of Global Energy Issues, 2016 Vol.39 No.3/4, pp.144 - 156

Received: 17 Apr 2015
Accepted: 25 Nov 2015

Published online: 04 May 2016 *

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