Heat transfer characteristics of flat plate finned-tube heat exchangers with large fin pitch

Yonghan Kim, Yong Chan Kim

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

The objective of this study is to provide experimental data that can be used in the optimal design of flat plate finned-tube heat exchangers with large fin pitch. In this study, 22 heat exchangers were tested with a variation of fin pitch, number of tube row, and tube alignment. The air-side heat transfer coefficient decreased with a reduction of the fin pitch and an increase of the number of tube row. The reduction in the heat transfer coefficient of the four-row heat exchanger coil was approximately 10% as the fin pitch decreased from 15.0 to 7.5 mm over the Reynolds number range of 500-900 that was calculated based on the tube diameter. For all fin pitches, the heat transfer coefficient decreased as the number of tube row increased from 1 to 4. The staggered tube alignment improved heat transfer performance more than 10% compared to the inline tube alignment. A heat transfer correlation was developed from the measured data for flat plate finned-tubes with large fin pitch. The correlation yielded good predictions of the measured data with mean deviations of 3.8 and 6.2% for the inline and staggered tube alignment, respectively.

Original languageEnglish
Pages (from-to)851-858
Number of pages8
JournalInternational Journal of Refrigeration
Volume28
Issue number6
DOIs
Publication statusPublished - 2005 Sep 1

Keywords

  • Experiment
  • Finned tube
  • Geometry
  • Heat exchanger
  • Heat transfer coefficient

ASJC Scopus subject areas

  • Food Science
  • Mechanical Engineering

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