Flow characteristics and thermal performance in chevron type plate heat exchangers
- Title
- Flow characteristics and thermal performance in chevron type plate heat exchangers
- Author
- 이관수
- Keywords
- Chevron; Corrugation; Plate heat exchanger; Large-eddy simulation; JF factor; Performance evaluation
- Issue Date
- 2014-11
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
- Citation
- INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 권: 78, 페이지: 699-706
- Abstract
- We report an unsteady numerical analysis using large-eddy simulation (LES) to investigate the fluid flow in chevron-type plate heat exchangers. The flow in the heat exchanger consisted of a streamwise direction component and furrow direction components, and this complex flow structure induced turbulence, even at low Reynolds numbers. In the turbulent regime, the flow periodically oscillated, inducing a secondary flow and a vortex pair. The friction factor f and Colburn factor j were investigated for various geometrical parameters, i.e., 30 degrees <= beta <= 60 degrees and 2.0 <= p/h <= 4.4. The results showed that both f and j increased with increasing chevron angle beta, and both increased as the ratio of the chevron pitch to the chevron height p/h decreased. We found that to achieve optimum performance, the following parameters should be used: beta = 30 degrees with laminar flow and beta = 60 degrees with turbulent flow; furthermore, p/h = 2.0 should be used in both laminar and turbulent flows. (C) 2014 Elsevier Ltd. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S001793101400622X?via%3Dihubhttp://hdl.handle.net/20.500.11754/51334
- ISSN
- 0017-9310; 1879-2189
- DOI
- 10.1016/j.ijheatmasstransfer.2014.07.033
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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