Multi-objective optimization of an offset strip fin heat exchanger for waste heat recovery in electric vehicles

Yunjae Park, Junhyuk Kim, Jinwoo Oh, Ukmin Han, Hoseong Lee

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

To increase short driving range of electric vehicle, it is important to reduce power consumption of heat pump system. In this study, an offset strip fin heat exchanger with perpendicular flow is investigated to improve the performance of an electric vehicle heat pump using waste heat. The correlations of the Colburn and friction factor are developed using the experimental data. The simulation results are compared to the experimental results and are validated within temperature and pressure errors of 1.51% and 1.55%, respectively. A multi-objective optimization is performed to maximize the thermal–hydraulic performance of the offset strip fin heat exchanger with six independent design variables via the approximation-assisted optimization technique. The five optimal designs exhibit a 3.7% increase in the heat transfer rate and a 42.1% decrease in the pressure drop for the main simulation condition. Sensitivity analysis and parametric studies are conducted to analyze the effects of each design variable. The results reveal that the fin wrinkle angle, fin height, fin length, and fin spacing had a significant impact on the thermal–hydraulic performance of the offset strip fin heat exchanger.

Original languageEnglish
Article number120533
JournalApplied Thermal Engineering
Volume228
DOIs
Publication statusPublished - 2023 Jun 25

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (RS-2023-00208700).

Publisher Copyright:
© 2023 Elsevier Ltd

Keywords

  • Colburn factor
  • Correlation
  • Friction factor
  • Offset strip fin
  • Optimization
  • Plate-fin heat exchanger

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

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