An experimental investigation on flow boiling heat transfer of refrigerants HFO-1234yf and HFC-134a in microchannels

Hamid Nalbandian, Chien Yuh Yang, Kuan Ting Chen

Research output: Contribution to journalConference articlepeer-review

Abstract

HFO-1234yf has similar thermodynamic properties to HFC-134a but much lower GWP value. It is expected as a good candidate to replace the refrigerant HFC-134a in the near future. However, only very few papers have been published in the past years regarding to the flow boiling heat transfer performance of this new refrigerant, but some of their results are still not in consistent with each other. This study provides an experimental measurement of flow boiling heat transfer of refrigerants HFO-1234yf and HFC-134a in a microchannel. The test results show that the flow boiling heat transfer performance depend on the fluid properties, flow conditions and flow patterns. The major controlling properties on heat transfer coefficients of flow boiling is strongly depending on their two-phase flow pattern at various flow conditions. The flow pattern analysis is able to explain the inconsistency between the test results in the previous published literatures on flow boiling heat transfer and pressure of refrigerants HFC-134a and HFO-1234yf adequately.

Original languageEnglish
Pages (from-to)512-519
Number of pages8
JournalRefrigeration Science and Technology
VolumePart F147651
DOIs
StatePublished - 2018
Event1st IIR International Conference on the Application of HFO Refrigerants, HFO 2018 - Birmingham, United Kingdom
Duration: 2 Sep 20185 Sep 2018

Keywords

  • Flow boiling
  • Flow Pattern
  • HFO-1234yf
  • Microchannel

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