Interactions between parallel minichannels during flow boiling of R134A

Dolaana M. Khovalyg, Predrag Stojan Hrnjak, Aleksandr V. Baranenko, Anthony M Jacobi

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

Abstract

This work focuses on the study of flow boiling of R134a in 0.54 mm square parallel minichannels, with a particular focus on the transient pressure drop of individual channels and their interaction. The individual pressure drop in each passage was analyzed to establish the inter-channel relationship; additionally, the effect of heat and mass flux and the inlet vapor qualities on the flow patterns of each channel was studied based on flow visualization and pressure drop measurements. The mass flux and heat flux in the experiments were varied up to 800 kg/m2s and 10 kW/m2 respectively. The heat flux was controlled and varied independently in each channel. Results illustrate that interaction between channels exists, and the correlation degree depends on the flow boiling dynamics in each passage. The pressure drop oscillation in each channel affects the flow redistribution between channels. A channel subjected to the least heat flux tends to correlate the most with greater heated channels because of the mass flux fluctuations caused by boiling phenomena in other channels.

Original languageEnglish (US)
Title of host publicationASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2014, Collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791846278
DOIs
StatePublished - Jan 1 2014
EventASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2014, Collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting - Chicago, United States
Duration: Aug 3 2014Aug 7 2014

Publication series

NameASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2014, Collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting

Other

OtherASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2014, Collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting
CountryUnited States
CityChicago
Period8/3/148/7/14

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Keywords

  • Cross correlation
  • Flow boiling
  • Minichannel
  • R134a
  • Transient pressure drop

ASJC Scopus subject areas

  • Process Chemistry and Technology

Cite this

Khovalyg, D. M., Hrnjak, P. S., Baranenko, A. V., & Jacobi, A. M. (2014). Interactions between parallel minichannels during flow boiling of R134A. In ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2014, Collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting (ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2014, Collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting). American Society of Mechanical Engineers. https://doi.org/10.1115/ICNMM2014-22246