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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
THERMAL AND HYDRODYNAMIC BEHAVIOR OF HFE7100 CONVECTIVE BOILING IN A MICROCHANNEL-BASED HEAT SINK
Submission Author:
João Zago , PR , Brazil
Co-Authors:
João Zago, Victor Hugo Monghini, Reinaldo Rodrigues de Souza, Elaine Maria Cardoso
Presenter: João Zago
doi://10.26678/ABCM.ENCIT2020.CIT20-0294
Abstract
Microchannel based heat sinks have proven to be an effective technique for cooling high energy density devices such as microprocessors. Two-phase systems provide high heat transfer coefficients for low mass fluxes values and a uniform surface temperature distribution. The present study experimentally evaluates the performance of a microchannel-based heat sink for convective boiling of HFE7100. The heat sink consists of 33 parallel rectangular channels of 10 mm in length, 200 μm in width, and 500 μm in height for each microchannel. Experimental data for heat transfer coefficient (HTC) and pressure drop are obtained under single-phase and two-phase flow conditions, for different mass fluxes values. It is observed an increase in HTC as the inlet subcooling and mass flux decrease; moreover, the pressure drop increases with an increase in mass flux and a decrease in the inlet subcooling. The correlations by Li and Wu (2010) and Kim and Mudawar (2012) are able to predict the two-phase HTC and pressure drop results with an absolute mean error of 16.14% and 79.37%, respectively.
Keywords
Convective Boiling, microchannels, pressure drop, heat transfer coefficient., HFE7100
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