Airside performance of smooth wavy fin-and-tube heat exchangers with large diameter tube

Wen Jenn Sheu, Chen Chieh Hsu, Chi-Chuan Wang*

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

In this study, the airside performance, in terms of heat transfer performance and frictional characteristics, of the sinusoidal wavy fin-and-tube heat exchangers are experimentally investigated. The test samples contain a tube diameter of 16.3 mm, a transverse tube pitch of 38.1 mm, a longitudinal tube pitch 33 mm, and the number of tube row ranges from 2 to 6. The corresponding fin pitch is 3 and 1.8 mm, respectively and the frontal velocity varies from 1 to 6 m/s. Test results indicate that negligible influence of fin pitch on the heat transfer performance when the number of tube row is 2 or 4. However, the heat transfer performance for the larger fin pitch (3 mm) are about 10-15% higher than those of 1.8 mm. The friction factor is also relatively independent of the number of tube row. The existing correlation applicable for sinusoidal wavy fin geometry over-predicts the present test data considerably.

Original languageEnglish
StatePublished - 1 Jan 2018
Event9th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2018 - Sapporo, Hokkaido, Japan
Duration: 10 Jun 201813 Jun 2018

Conference

Conference9th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2018
CountryJapan
CitySapporo, Hokkaido
Period10/06/1813/06/18

Keywords

  • Coburn j factor
  • Fin-and-tube heat exchanger
  • Friction factor
  • Sinusoidal wavy fin

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