Two-phase flow distribution in dual-compartment microchannel heat exchanger header

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

Abstract

With the inherent flow maldistribution problem within the microchannel heat exchanger header, which degrades the heat transfer performance, new microchannel heat exchanger header was designed and tested to improve this flow distribution performance, specifically for R410A. It features dual-compartment made of multiple layers consisting of the main section, baffle and hole seat, and rear section. Twenty flat tubes containing microchannels were inserted at 50% protrusion. Experiments and visualizations were conducted at 50, 100, and 200 kg·h-1 of mass flow rate (equivalent mass flux of 220.5, 441, and 882 kg·m-2s-1), which were at partial to full loading capacity. Inlet vapor quality was fixed at 0.2 and evaporating temperature at 15 ºC, for evaporator application of air-conditioning system. Considering the same microchannel element, flow distribution enhancement was achieved when compared to the conventional header data. Liquid flow distribution was improved by around 65% at part-load conditions based on the relative standard deviation.

Original languageEnglish
Title of host publicationICR 2019 - 25th IIR International Congress of Refrigeration
EditorsVasile Minea
PublisherInternational Institute of Refrigeration
Pages1515-1522
Number of pages8
ISBN (Electronic)9782362150357
DOIs
Publication statusPublished - 2019
Event25th IIR International Congress of Refrigeration, ICR 2019 - Montreal, Canada
Duration: 2019 Aug 242019 Aug 30

Publication series

NameRefrigeration Science and Technology
Volume2019-August
ISSN (Print)0151-1637

Conference

Conference25th IIR International Congress of Refrigeration, ICR 2019
CountryCanada
CityMontreal
Period19/8/2419/8/30

Keywords

  • Dual-Compartment Header
  • Flow Distribution
  • Heat Exchanger
  • Microchannel
  • Two-Phase Flow

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Condensed Matter Physics

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  • Cite this

    Redo, M. A., Jeong, J., Yamaguchi, S., Saito, K., & Kim, H. (2019). Two-phase flow distribution in dual-compartment microchannel heat exchanger header. In V. Minea (Ed.), ICR 2019 - 25th IIR International Congress of Refrigeration (pp. 1515-1522). [1267] (Refrigeration Science and Technology; Vol. 2019-August). International Institute of Refrigeration. https://doi.org/10.18462/iir.icr.2019.1267