Abstract
In this study, the cooling performance of a liquid CPU cooler using the water/propylene glycol(PG)-based <TEX>$Al_2O_3$</TEX> nanofluids is experimentally investigated. Water/PG-based <TEX>$Al_2O_3$</TEX> nanofluids are manufactured by two-step method with ultrasonic energy for 10 hours. The volume fractions of the nanofluids are 0.25% and 0.35%. Thermal conductivity and viscosity of the nanofluids are measured to theoretically predict the thermal performance of the liquid CPU cooler using performance factor. Performance factor results indicate that the cooling performance of the liquid CPU cooler can be improved using the manufactured nanofluids. To evaluate the cooling performance of the liquid CPU cooler experimentally, temperature differences between ambient air and heater are measured for base fluid and nanofluids respectively. Based on the results, it is shown that performance of the liquid CPU cooler using <TEX>$Al_2O_3$</TEX> nanofluids is improved maximum up to 8.6% at 0.25 Vol.%.
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