Numerical investigation of vertical helically coiled tube heat exchangers thermal performance

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Abstract

The purpose of the present study is thermal performance assessment of vertical helically coiled tube heat exchangers, at various shell-side mass flow rates, various coil-to-tube diameter ratios, and different dimensionless coil pitches. A particular difference of this study with other studies performed on similar configurations is the boundary conditions for the helical coil. While most studies focus on simplified thermal conditions like constant wall temperature or constant heat flux on the coil surface, in the present study a conjugate thermal boundary condition for the tube wall fluid-to-fluid heat transfer mechanism, is considered. The assessment of the thermal performance is conducted using numerical solution based on control volume method. The calculations is performed for steady-state conditions and three-dimensional system.

Original languageEnglish (US)
Pages (from-to)252-259
Number of pages8
JournalApplied Thermal Engineering
Volume136
DOIs
StatePublished - May 25 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2018 Elsevier Ltd

Keywords

  • Effectiveness-NTU
  • Forced convection
  • Helically coiled tube heat exchangers
  • Shell-and-tube heat exchanger

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