Publikacje

Abstract:

A microchannel heat sink (MCHS) is a compact, effective cooling device that meets the heat
dissipation requirements of high-power electronic equipment. This paper investigates the impact
of utilizing Al2O3/water, MgO/water, and TiO2/water nanofluids in a rectangular MCHS. To
ensure an acceptable comparison, the flow rate is kept constant at 2 m/s. The heat sink base is
subjected to 90W of steady heat dissipation, which produces the desired performance result. The
vol. concentration of nanofluids ranges from 0 to 8%. The study covers a wide range of MCHS
geometries; channel height (Hch) and its width (Wch) ranging from 200 to 800 μm and 100–500
μm respectively. The problem is modeled, validated, and analyzed. The use of nanofluids maximizes
the heat transfer performance to 24.95% and minimizes thermal resistance and total entropy
generation (TEG) to 15.01%, and 19.96% respectively. TEG decreases to 53.15% when Hch
increases and the same increases to 198% when Wch increases. Nanofluids at highest vol. concentration
as well as increase in Hch and Wch penalize the system maximum by demanding more
pumping power (Ω) by 25.58%, 173.36%, and 39% respectively. Al2O3/water and MgO/water
nanofluids deliver better performance and are recommended for future applications. Finally, the
authors suggest concentration and geometric parameter ranges for optimality of the thermal
performance.

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Influence of nanofluids on the thermal performance and entropy generation of varied geometry microchannel heat sink