Liquid flow distribution in compact parallel flow heat exchangers

Ing Youn Chen*, Jhong Syuan Tsai, Chi-Chuan Wang, Kai Shing Yang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study experimentally and numerically investigates the single-phase flow into parallel flow heat exchangers with inlet and outlet rectangular headers having square cross section and 9 circular tubes. The effects of inlet flow condition, tube diameter header size, area ratio, flow directions (Z and U type), as well as the gravity are investigated. The experimental results indicate that flow distribution for U type flow is more uniform than Z type flow. Depending on the inlet volumetric flow rate, the flow ratio at the first several tubes can be lower than 50% of the last tube for Z type arrangement, and this phenomenon becomes more and more pronounced with the rising velocity at the intake conduit. The mal-distribution can be eased via reducing the branching tube size or increasing the entrance settling distance at the intake conduit. It is found that the influence of gravity on mal-distribution is negligible and the mal-distribution is associated with the jet flow pattern. The numerical result also shows a small eddy flow formed at the inlet of the first tube by the nearby vortex circulation which would reduce the flow rate to the front tubes.

Original languageEnglish
Title of host publication2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011
Pages333-337
Number of pages5
DOIs
StatePublished - 29 Sep 2011
Event2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011 - Xi'an, China
Duration: 27 May 201129 May 2011

Publication series

Name2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011

Conference

Conference2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011
CountryChina
CityXi'an
Period27/05/1129/05/11

Keywords

  • flow distribution
  • header
  • parallel flow heat exchangers

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  • Cite this

    Chen, I. Y., Tsai, J. S., Wang, C-C., & Yang, K. S. (2011). Liquid flow distribution in compact parallel flow heat exchangers. In 2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011 (pp. 333-337). [6014907] (2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011). https://doi.org/10.1109/ICCSN.2011.6014907