@InProceedings{Riehl:2018:TwPrDr,
author = "Riehl, Roger Ribeiro",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Two-Phase Pressure Drop Correlation During the Convective
Condensation in Microchannel Flows",
booktitle = "Proceedings...",
year = "2018",
organization = "Heat Powered Cycles Conference",
keywords = "convective condensation, microchannels, thermal control, pressure
drop.",
abstract = "This paper presents the experimental results on two-phase pressure
drop related to microchannel flows during convective condensation.
Two pumping systems, one being on a capillary pumped loop (CPL)
mode and the other being with a magnetic driven pump with variable
flow rate, were used in the experimental apparatus to test
microchannel condensers with methanol as the working fluid. Tests
were conducted for two different saturation temperatures, for a
range of heat dissipation rate from 20 to 350 W, four microchannel
condensers and mass flow rates of up to 600 kg/m2 s. The results
showed that the microchannel condensers presented high pressure
drop (up to 63 kPa) for the mass flow rate applied, which is
mainly related to the microchannels reduced geometry. The levels
of pressure drop observed were also considered high, as only
laminar flow was verified during the tests. A correlation for the
two-phase multiplier was obtained to correlate the experimental
data, which showed to predict 85 % of the experimental results
within an error range of less than 35 % for both saturation
temperatures tested. The obtained correlation presented very high
sensibility when calculating the pressure drop along the
microchannels, considering the geometric factors and heat transfer
capabilities of such equipment, which was able to present a good
correlation with the experimental data.",
conference-location = "Germany",
conference-year = "16-19 sept.",
language = "en",
targetfile = "riehl_two.pdf",
urlaccessdate = "28 abr. 2024"
}