Improved heat transfer of the engine oil by changing it to hybrid nanofluid: Adding hybrid nano-powders
2021
Liu, KeNan | Zhang, Yang | Dai, Fei | Sun, Wei
In this study many experimental measurements were conducted to examine the efficacy of loading MWCNT-TiO₂ into SAE 20 W-40 on thermal conductivity (k). Through applying FESEM and XRD tests, molecular structures of nanoparticle were inspected and using two-step method, nanofluid samples at 0.1, 0.2, 0.4 and 0.8 vol% were prepared. After passing DLS and zeta potential tests, kMWCNT₋TᵢO₂/SAE ₂₀W₋₄₀ was measured using KD2 Pro at 20–70°C and 0.1–0.8 vol%. Based on results, it was observed that kMWCNT₋TᵢO₂/SAE ₂₀W₋₄₀ was higher than kSAE ₂₀W₋₄₀ and therefore inserting MWCNT and TiO₂ into 20 W-40 has a positive effect on thermal conductivity up to 24.42%. Therefore, the number of dispersed nanoparticles has a considerable effect on kSAE ₂₀W₋₄₀ so that at 0.1 and 0.8 vol%, it was improved by 3% and 24.42%, respectively. Although kSAE ₂₀W₋₄₀ declines by 5.75% with increasing temperature from 20 to 70°C.
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