Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5016995 | International Journal of Refrigeration | 2017 | 11 Pages |
Abstract
This study examines the experimental adiabatic two-phase frictional pressure drop of R134a in rectangular multiport minichannel with and without fins having 20 channels with hydraulic diameters of 0.64âmm and 0.81âmm, respectively. The pressure drop measurements were done under mass flux range of 50-200âkgâmâ2âsâ1, saturation temperature range of 20-35â°C, and inlet vapor quality range of 0.1-0.9. The effects of mass flux, saturation temperature, inlet vapor quality and channel geometry on frictional pressure drop were investigated. The results discovered that the mass flux, inlet vapor quality, saturation temperature and channel geometry play an important role in increasing or decreasing the frictional pressure drop. The present experimental data were compared with eleven existing well known frictional pressure drop correlation available in the open literature. In addition, a new two-phase frictional pressure drop correlation is proposed considering the effects of inertia, viscous force, fluid properties, channel geometry and surface tension and also validated the correlation with the available data.
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Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
M. Mostaqur Rahman, Keishi Kariya, Akio Miyara,