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In this manuscript, a common structure of a plate fin-and-tube heat exchanger (FTHE) is studied. Three different types of heat exchangers (HEs) with round, oval, and flat tubes are examined using the numerical simulation method based on the same hydraulic diameter. Subsequently, the new compound tube HE configuration is proposed, and through further analysis, the optimal structure of the oval-flat tube is determined. The oval-flat tube HE demonstrates an average increase of approximately 41.3% in the j/f factor when compared to the initial single-round tube HE. In other words, the new FTHE can obtain the maximum convective ha at the smallest ∆P.

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Numerical Study of the Influence of Base Tube Shape on Fin-and-Tube Heat Exchangers

  • 会议论文

  • 发表日期：

    2025年

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  • Chaoxu Zhang,
  • Jiatong Lu,
  • Xiuao Zhang,
  • Heng Zhang,
  • Hongxia Zhao,
  • Zhitong Ma

摘要

In this manuscript, a common structure of a plate fin-and-tube heat exchanger (FTHE) is studied. Three different types of heat exchangers (HEs) with round, oval, and flat tubes are examined using the numerical simulation method based on the same hydraulic diameter. Subsequently, the new compound tube HE configuration is proposed, and through further analysis, the optimal structure of the oval-flat tube is determined. The oval-flat tube HE demonstrates an average increase of approximately 41.3% in the j/f factor when compared to the initial single-round tube HE. In other words, the new FTHE can obtain the maximum convective ha at the smallest ∆P.