TY - GEN
T1 - Interactions between parallel minichannels during flow boiling of R134A
AU - Khovalyg, Dolaana M.
AU - Hrnjak, Predrag S.
AU - Baranenko, Aleksandr V.
AU - Jacobi, Anthony M.
N1 - Publisher Copyright:
Copyright © 2014 by ASME.
PY - 2014
Y1 - 2014
N2 - 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.
AB - 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.
KW - Cross correlation
KW - Flow boiling
KW - Minichannel
KW - R134a
KW - Transient pressure drop
UR - http://www.scopus.com/inward/record.url?scp=85043223839&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85043223839&partnerID=8YFLogxK
U2 - 10.1115/ICNMM2014-22246
DO - 10.1115/ICNMM2014-22246
M3 - Conference contribution
AN - SCOPUS:85043223839
T3 - 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
BT - 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
PB - American Society of Mechanical Engineers
T2 - 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
Y2 - 3 August 2014 through 7 August 2014
ER -