Efficacy of hybrid nano-powder presence on the thermal conductivity of the engine oil: An experimental study
2020
Tian, Xiao-Xiao | Kalbasi, Rasool | Qi, Cong | Karimipour, Arash | Huang, Hong-Li
This study investigated the Al₂O₃-MWCNT presence efficacy on the thermal conductivity of the engine oil (10 W40) base fluid. Owing to the dependency of thermal conductivity on temperature and number of nanoparticles, the experimental measurements were conducted at 25–65 °C and volume fraction of 0.05, 0.1, 0.25, 0.5 and 1 vol%. Also, zeta potential test was performed at two different times to verify the long-term stability. Based on experiment results, at constant temperature gradient, the oil's ability to conduct heat at 65 °C is about 4.4% lower than that of 25 °C. But the addition of nanoparticles of Al₂O₃-MWCNT by 1 vol% into the oil augmented the heat transfer potential by 9.62%. It was found that the positive effects of adding nanoparticles of MWCNT-Al₂O₃ to engine oil (10 W40) on thermal conductivity enhancement were amplified at higher temperatures. Due to the incorporation of MWCNT-Al₂O₃ into oil, thermal conductivity enhanced up to 30.53%. Finally, through approving a regression-based correlation, Al₂O₃-MWCNT/engine oil (10 W40) thermal conductivity was predicted and applying analysis of variance, the thermal conductivity dependency to volume fraction and temperature were examined.
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