TY - JOUR
T1 - CFD investigation of R134a and propane condensation in square microchannel using VOF model
T2 - Parametric study using steady state solution
AU - Alnaimat, Fadi
AU - El Kadi, Khadije
AU - Mathew, Bobby
N1 - Funding Information:
The authors acknowledge financial support received from Abu Dhabi Department of Education and Knowledge (ADEK) in UAE for Grant no. 21N220-AARE18-089, and the United Arab Emirates University, and National Water Center for Grant no. (12R127, 31R153).
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/2/1
Y1 - 2023/2/1
N2 - In this paper, a steady-state analyses of R134a and Propane (R290) condensation inside a 0.5-mm square microchannel are carried out. A three-dimensional (3D) multiphase computational fluid dynamics (CFD) model is developed based on Volume-of fluid (VOF) approach. The model is first validated for mass transfer intensity factor ranging from 60,000 to 400,000 s−1. Thereafter, condensation heat transfer investigation is carried out for different operational conditions including the mass flux ranging from 150 kg/(m2·s) to 1200 kg/(m2·s), saturation-to-wall temperature difference ranging from 5 °C to 25 °C, and inlet vapor quality ranging from 1 to 0.5. The condensation flow regime transition from film annular, wavy annular, plug, slug and fully condensed flow are observed in the obtained simulation results. The average heat transfer coefficient is found to increase with increasing mass flux, low saturation-to-wall temperature difference, and higher inlet vapor quality. In addition, propane is proved to be environmentally friendly substitute of R134a with enhanced heat transfer coefficient by 65–80 % compared to that the latter. The present model allows assessing several two-phase condensing flow parameters with good agreement with literature.
AB - In this paper, a steady-state analyses of R134a and Propane (R290) condensation inside a 0.5-mm square microchannel are carried out. A three-dimensional (3D) multiphase computational fluid dynamics (CFD) model is developed based on Volume-of fluid (VOF) approach. The model is first validated for mass transfer intensity factor ranging from 60,000 to 400,000 s−1. Thereafter, condensation heat transfer investigation is carried out for different operational conditions including the mass flux ranging from 150 kg/(m2·s) to 1200 kg/(m2·s), saturation-to-wall temperature difference ranging from 5 °C to 25 °C, and inlet vapor quality ranging from 1 to 0.5. The condensation flow regime transition from film annular, wavy annular, plug, slug and fully condensed flow are observed in the obtained simulation results. The average heat transfer coefficient is found to increase with increasing mass flux, low saturation-to-wall temperature difference, and higher inlet vapor quality. In addition, propane is proved to be environmentally friendly substitute of R134a with enhanced heat transfer coefficient by 65–80 % compared to that the latter. The present model allows assessing several two-phase condensing flow parameters with good agreement with literature.
KW - CFD
KW - Condensation
KW - Microchannel
KW - Two-phase flow
KW - Volume of fluid
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U2 - 10.1016/j.tsep.2023.101662
DO - 10.1016/j.tsep.2023.101662
M3 - Article
AN - SCOPUS:85146305073
SN - 2451-9049
VL - 38
JO - Thermal Science and Engineering Progress
JF - Thermal Science and Engineering Progress
M1 - 101662
ER -