Research output: Contribution to journal › Conference article › peer-review
High heat flux flow boiling of water and dielectric coolant in parallel microchannels. / Kuznetsov, Vladimir V.; Shamirzaev, Alisher S.
In: International Heat Transfer Conference, Vol. 2018-August, 01.01.2018, p. 1153-1160.Research output: Contribution to journal › Conference article › peer-review
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TY - JOUR
T1 - High heat flux flow boiling of water and dielectric coolant in parallel microchannels
AU - Kuznetsov, Vladimir V.
AU - Shamirzaev, Alisher S.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - The experimental investigation was carried out to study the effect of heat flux, mass flux and inlet subcooling on the local heat transfer coefficient during subcooled flow boiling of water and saturated flow boiling of perfluorohexane in horizontal microchannel heat sink. Precise milling was used for manufacturing two microchannel plates. One of the plates has twenty-one microchannels with cross section of 335x930 m, the another plate has two microchannels with cross section of 2000x360 m. The distributions of local heat transfer coefficients along the length and width of the microchannel plates were measured using thermocouples installed into holes in the copper block with cartridge heaters. The experiments with dielectric fluid perfluorohexane were performed for mass flux 450 kg/m2s and heat fluxes ranging from 1 to 15 W/cm2. The experiments with water were performed for heat fluxes ranging from 25 to 500 W/cm2 and mass flux ranging from 480 to 4700 kg/m2s. For perfluorohexane, it was obtained that the evaporation of thin liquid film becomes decisive mechanism of heat transfer for heat flux less than 6 W/cm2. For heat flux higher than 12 W/cm2 nucleate boiling suppressing in thin liquid films causes the heat transfer deterioration. The subcooled flow boiling of water in short microchannel shows the obvious impact of mass flux on the value of heat transfer coefficient. Using data for perfluorohexane and water, two existing heat transfer correlations for flow boiling were verified and show good agreement with the experimental data.
AB - The experimental investigation was carried out to study the effect of heat flux, mass flux and inlet subcooling on the local heat transfer coefficient during subcooled flow boiling of water and saturated flow boiling of perfluorohexane in horizontal microchannel heat sink. Precise milling was used for manufacturing two microchannel plates. One of the plates has twenty-one microchannels with cross section of 335x930 m, the another plate has two microchannels with cross section of 2000x360 m. The distributions of local heat transfer coefficients along the length and width of the microchannel plates were measured using thermocouples installed into holes in the copper block with cartridge heaters. The experiments with dielectric fluid perfluorohexane were performed for mass flux 450 kg/m2s and heat fluxes ranging from 1 to 15 W/cm2. The experiments with water were performed for heat fluxes ranging from 25 to 500 W/cm2 and mass flux ranging from 480 to 4700 kg/m2s. For perfluorohexane, it was obtained that the evaporation of thin liquid film becomes decisive mechanism of heat transfer for heat flux less than 6 W/cm2. For heat flux higher than 12 W/cm2 nucleate boiling suppressing in thin liquid films causes the heat transfer deterioration. The subcooled flow boiling of water in short microchannel shows the obvious impact of mass flux on the value of heat transfer coefficient. Using data for perfluorohexane and water, two existing heat transfer correlations for flow boiling were verified and show good agreement with the experimental data.
KW - Electronic cooling
KW - Flow boiling
KW - Heat exchanger
KW - Heat transfer
KW - Micro/nano
KW - Microchannel
UR - http://www.scopus.com/inward/record.url?scp=85068325574&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85068325574
VL - 2018-August
SP - 1153
EP - 1160
JO - International Heat Transfer Conference
JF - International Heat Transfer Conference
SN - 2377-424X
T2 - 16th International Heat Transfer Conference, IHTC 2018
Y2 - 10 August 2018 through 15 August 2018
ER -
ID: 21165212