THERMAL SCIENCE

International Scientific Journal

INFLUENCE OF FIN THICKNESS ON HEAT TRANSFER AND FLOW PERFORMANCE OF A PARALLEL FLOW EVAPORATOR

ABSTRACT
This paper studies numerically the influence of the louver's fin thickness on heat transfer and flow performance of a parallel flow evaporator, a comprehensive evaluation and analysis of the five structures at different Reynolds numbers are systematically carried out. Comparison of the numerical results with the experimental data shows good agreement with maximal errors of 12.16% and 5.29% for the heat transfer factor and the resistance factor, respectively. The results show that the heat transfer coefficient and the pressure drop increase with the increase of the thickness of the louver fins when the Reynolds number is a constant. The analysis of the comprehensive evaluation factor shows that the A-type fin is the best, and it can effectively strengthen the heat exchange on the air side and improve the heat transfer capacity of the system. The research results can provide reference for the structural optimization of the louver fins.
KEYWORDS
PAPER SUBMITTED: 2018-05-04
PAPER REVISED: 2018-11-15
PAPER ACCEPTED: 2018-11-19
PUBLISHED ONLINE: 2019-09-14
DOI REFERENCE: https://doi.org/10.2298/TSCI1904413L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE 4, PAGES [2413 - 2419]
REFERENCES
  1. Xu, B., et al., Simulation and Parametric Analysis of Microchannel Condenser, Refrigeration Technolo-gy, 31 (2011), 4, pp. 16-20
  2. Jiang, L. X., et al., The Numerical Simulation and Performance Analysis of Variable Angle Louver Fin in Parallel Flow Evaporator, Cryogenics & Superconductivity, 40 (2012), 11, pp. 49-54
  3. Zhang, Y. X., et al., Heat Transfer and Pressure Drop Characteristics of R134a Flow Boiling in the Par-allel/Tandem Microchannel Heat Sinks, Energy Conversion and Management, 148 (2017), Sept., pp. 1082-1095
  4. Yang, F. Y., et al., Performance of New Variable Angle Louver Fin Heat Exchanger, Cryogenics & Su-perconductivity, 43 (2015), 6, pp. 84-88
  5. Kim, M. H., et al., Air-side Thermal Hydraulic Performance of Multi-Louvered Fin Aluminum Heat Ex-changers, International Journal of Refrigeration, 25 (2002), 3, pp. 390-400
  6. Chang, Y. J., et al., A Generalized Heat Transfer Correlation for Louver Fin Geometry, Heat and Mass Transfer, 40 (1997), 3, pp. 533-544
  7. Davenport, C. J., Correlations for Heat Transfer and Flow Friction Characteristics of Louvred Fin, AICHE Symposium Series, 79 (1983), 25, pp. 19-27
  8. Kim, J. H., et al., Heat-Transfer and Friction Characteristics for the Louver-Fin Heat Exchanger, Journal of Thermophysics and Heat Transfer, 18 (2004), 1, pp. 58-64

© 2020 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence