Correlations and optimization of a heat exchanger with offset-strip fins
- Authors
- Kim, Min-Soo; Lee, Jonghyeok; Yook, Se-Jin; Lee, Kwan-Soo
- Issue Date
- Apr-2011
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Offset-strip fins; Correlation; j Factor; f Factor; Prandtl number; Blockage ratio; Optimization
- Citation
- INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.54, no.9-10, pp.2073 - 2079
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
- Volume
- 54
- Number
- 9-10
- Start Page
- 2073
- End Page
- 2079
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/168742
- DOI
- 10.1016/j.ijheatmasstransfer.2010.11.056
- ISSN
- 0017-9310
- Abstract
- The thermo-flow characteristics of a heat exchanger with offset-strip fins are numerically investigated for various fin geometries and working fluids. Previous correlations underestimate f values in the laminar and turbulent regimes and overestimate j values in the laminar regime, as the blockage ratio increase. Therefore, new correlations, which apply to offset-strip fins with blockage ratios of greater than 20%, are presented. Even though the working fluid was changed, the f values did not vary. However, the j values differed according to the working fluid. New j correlations were suggested as functions of the Prandtl number. Design variables of the offset-strip fins in a fuel cooler were optimized by using the correlations and the design of experiment. As a result, the JF factor of the optimized offset-strip fin was enhanced by 24% compared with that of the reference offset-strip fin.
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