N. M. M., Zawawi and Azmi, W. H. and A. A. M., Redhwan and M. Z., Sharif and Mahendran, Samykano (2018) Experimental investigation on thermo-physical properties of metal oxide composite nanolubricants. International Journal of Refrigeration, 89. pp. 11-21. ISSN 0140-7007. (Published)
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Abstract
The thermal conductivity and dynamic viscosity of three different combinations of metal oxide composite nanolubricant had been investigated at different nanoparticle volume concentrations (0.02 to 0.1%) and different temperatures (303–353 K). The prepared Al2O3–SiO2, Al2O3–TiO2 and TiO2–SiO2 composite metal oxide nanoparticle was dispersed in Polyalkylene Glycol (PAG 46) lubricant by espousing the two-step preparation method. The thermal and viscosity experiment was performed using KD2 Pro Thermal Properties Analyzer and LVDV-III Rheometer, respectively. All the considered metal oxide composite nanolubricants were witnessed to behave as Newtonian fluids. A maximum viscosity enhancement of 20.50% recorded for Al2O3–TiO2/PAG nanolubricant with 0.1% nanoparticle volume concentration and at the temperature of 303 K. Whereas, the highest thermal conductivity improvement recorded for Al2O3–SiO2/PAG nanolubricant with 2.41% improvement at 0.1% nanoparticle concentration and temperature of 303 K. A new regression model to estimate the dynamic viscosity and thermal conductivity of metal oxide composite nanolubricants were proposed based on the finding obtained.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Hybrid nanolubricants; Thermal conductivity; Dynamic viscosity; Newtonian; Refrigeration compressor |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Faculty/Division: | Faculty of Mechanical Engineering Institute of Postgraduate Studies |
| Depositing User: | Dr. Wan Azmi Wan Hamzah |
| Date Deposited: | 02 Jan 2019 08:16 |
| Last Modified: | 30 Oct 2019 04:18 |
| URI: | http://umpir.ump.edu.my/id/eprint/23531 |
| Download Statistic: | View Download Statistics |
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