THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

online first only

Numerical study for heat transfer enhancement using CuO-H2O nano-fluids through mini-channel heat sinks for microprocessor cooling

ABSTRACT
Water cooled heat sinks are becoming popular due to increased heat generation inside the microprocessor. Timely heat removal from microprocessor is the key factor for better performance and long life. Heat transfer enhancement is reached either by increasing the surface area density and/or by altering the base fluid properties. Nano-particles emerge as a strong candidate to increase the thermal conductivity of base fluids. In this research, the thermal performance of mini-channel heat sinks for different fin spacing (0.2mm, 0.5mm, 1mm and 1.5mm) was investigated numerically using CuO-H2O nano-fluids with volumetric concentration of 1.5%. The numerical values computed were than compared with the literature and a close agreement is achieved. We recorded the minimum base temperature of chip to be 36.80C for 0.2mm fin spacing heat sink. A reduction of 9.1% in base temperature was noticed using CuO-H2O nano-fluids for 0.2mm fin spacing as compared to previously experimental estimated value using water [1]. The drop percentage difference in pressure between water and CuO-H2O nano-fluids was 2.2 to 13.1 % for various fin spacing heat sinks. The percentage difference in thermal resistance between water and CuO-H2O nano-fluids was computed 12.1% at maximum flow rate. We also observed uniform temperature distribution for all heat sinks.
KEYWORDS
PAPER SUBMITTED: 2018-07-22
PAPER REVISED: 2018-12-07
PAPER ACCEPTED: 2019-01-16
PUBLISHED ONLINE: 2019-02-17
DOI REFERENCE: https://doi.org/10.2298/TSCI180722022A
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