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Parametric study of heat transfer enhancement on cross-flow heat exchangers

Luo, Xiaojun


Xiaojun Luo
Lecturer in Financial Technology


© 2017 Elsevier B.V. Energy crisis is increasingly serious all over the world, therefore, energy saving and efficiency enhancement is on the focus. Technology in heat transfer enhancement, which can improve efficiency of heat exchangers, is always attached importance to by scientists and engineers. Heat exchangers with recycle means a part of worked fluid is delivered by a pump to the inlet port and mixed with incoming working fluid to achieve larger convective heat transfer coefficient. In this research, cross-flow heat exchangers with external and internal recycles were investigated in the laminar regime respectively. Mathematical models of heat exchangers were established to study its thermo-hydraulic performances. The effects of recycle ratio, capacitance rate ratio and heat transfer area were investigated. The results demonstrate that the dimensionless heat transfer rate rises with the increase of recycle ratio R or capacitance rate ratio C2/C1, or with the decrease of heat transfer area A. The maximum increase of efficiency reached up to 28% and 21% for internal and external recycles, respectively.


Luo, X. (2017). Parametric study of heat transfer enhancement on cross-flow heat exchangers. Chemical Engineering and Processing: Process Intensification, 121, 81-89.

Journal Article Type Article
Acceptance Date Oct 30, 2017
Online Publication Date Jul 26, 2017
Publication Date Nov 1, 2017
Journal Chemical Engineering and Processing: Process Intensification
Print ISSN 0255-2701
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 121
Pages 81-89
Keywords internal/external recycle, heat exchanger, mathematical model, laminar flow, thermo-hydraulic performance
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