Experimental investigation on stability and thermo-physical properties of Al2O3-SiO2/PAG nanolubricants with different nanoparticle ratios

The thermo-physical properties enhancement of nanolubricants can improve the heat transfer performance in refrigeration system. In this study, thermo-physical properties of Al2O3–SiO2/PAG nanolubricants were investigated at 30–80 °C temperatures for different nanoparticle ratios. Al2O3 and SiO2 nano...

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Main Authors:	Zawawi, N. M. M., Azmi, W. H., Sharif, M. Z., G., Najafi
Format:	Article
Language:	English
Published:	Springer 2019
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/24767/ http://umpir.ump.edu.my/id/eprint/24767/ http://umpir.ump.edu.my/id/eprint/24767/ http://umpir.ump.edu.my/id/eprint/24767/7/Experimental%20investigation%20on%20stability%20and%20thermo-physical%20properties.pdf

id	ump-24767
recordtype	eprints
spelling	ump-247672019-06-12T03:40:03Z http://umpir.ump.edu.my/id/eprint/24767/ Experimental investigation on stability and thermo-physical properties of Al2O3-SiO2/PAG nanolubricants with different nanoparticle ratios Zawawi, N. M. M. Azmi, W. H. Sharif, M. Z. G., Najafi TJ Mechanical engineering and machinery The thermo-physical properties enhancement of nanolubricants can improve the heat transfer performance in refrigeration system. In this study, thermo-physical properties of Al2O3–SiO2/PAG nanolubricants were investigated at 30–80 °C temperatures for different nanoparticle ratios. Al2O3 and SiO2 nanoparticles were dispersed in the polyalkylene glycol (PAG 46) lubricant using the two-step method of preparation. Thermal conductivity and dynamic viscosity of the nanolubricants were measured by using KD2 Pro thermal properties analyser and LVDV-III Rheometer, respectively. All the hybrid nanolubricants are witnessed to behave as Newtonian fluids. A maximum thermal conductivity enhancement of 2.41% occurred at the temperature of 80 °C. Meanwhile for dynamic viscosity, the highest percentage increment was found up to 9.34% at 70 °C temperature. Increments in both properties were recorded for 50:50 nanoparticle ratio. The property enhancement ratio (PER) evaluation was suggested 60:40 as the optimum nanoparticle ratio with the lowest PER in comparison with other nanoparticle ratios at all temperatures by considering of both properties. Finally, new correlations have been proposed based on the experimental data to predict the thermo-physical properties of Al2O3–SiO2/PAG nanolubricants. As a conclusion, Al2O3–SiO2/PAG nanolubricants with nanoparticle ratio of 60:40 and volume concentrations of less than 0.1% are highly recommended for application in refrigeration system. Springer 2019-01 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/24767/7/Experimental%20investigation%20on%20stability%20and%20thermo-physical%20properties.pdf Zawawi, N. M. M. and Azmi, W. H. and Sharif, M. Z. and G., Najafi (2019) Experimental investigation on stability and thermo-physical properties of Al2O3-SiO2/PAG nanolubricants with different nanoparticle ratios. Journal of Thermal Analysis and Calorimetry, 135 (2). pp. 1243-1255. ISSN 1388-6150 (print); 1588-2926 (online) https://doi.org/10.1007/s10973-018-7670-4 https://doi.org/10.1007/s10973-018-7670-4
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Zawawi, N. M. M. Azmi, W. H. Sharif, M. Z. G., Najafi Experimental investigation on stability and thermo-physical properties of Al2O3-SiO2/PAG nanolubricants with different nanoparticle ratios
description	The thermo-physical properties enhancement of nanolubricants can improve the heat transfer performance in refrigeration system. In this study, thermo-physical properties of Al2O3–SiO2/PAG nanolubricants were investigated at 30–80 °C temperatures for different nanoparticle ratios. Al2O3 and SiO2 nanoparticles were dispersed in the polyalkylene glycol (PAG 46) lubricant using the two-step method of preparation. Thermal conductivity and dynamic viscosity of the nanolubricants were measured by using KD2 Pro thermal properties analyser and LVDV-III Rheometer, respectively. All the hybrid nanolubricants are witnessed to behave as Newtonian fluids. A maximum thermal conductivity enhancement of 2.41% occurred at the temperature of 80 °C. Meanwhile for dynamic viscosity, the highest percentage increment was found up to 9.34% at 70 °C temperature. Increments in both properties were recorded for 50:50 nanoparticle ratio. The property enhancement ratio (PER) evaluation was suggested 60:40 as the optimum nanoparticle ratio with the lowest PER in comparison with other nanoparticle ratios at all temperatures by considering of both properties. Finally, new correlations have been proposed based on the experimental data to predict the thermo-physical properties of Al2O3–SiO2/PAG nanolubricants. As a conclusion, Al2O3–SiO2/PAG nanolubricants with nanoparticle ratio of 60:40 and volume concentrations of less than 0.1% are highly recommended for application in refrigeration system.
format	Article
author	Zawawi, N. M. M. Azmi, W. H. Sharif, M. Z. G., Najafi
author_facet	Zawawi, N. M. M. Azmi, W. H. Sharif, M. Z. G., Najafi
author_sort	Zawawi, N. M. M.
title	Experimental investigation on stability and thermo-physical properties of Al2O3-SiO2/PAG nanolubricants with different nanoparticle ratios
title_short	Experimental investigation on stability and thermo-physical properties of Al2O3-SiO2/PAG nanolubricants with different nanoparticle ratios
title_full	Experimental investigation on stability and thermo-physical properties of Al2O3-SiO2/PAG nanolubricants with different nanoparticle ratios
title_fullStr	Experimental investigation on stability and thermo-physical properties of Al2O3-SiO2/PAG nanolubricants with different nanoparticle ratios
title_full_unstemmed	Experimental investigation on stability and thermo-physical properties of Al2O3-SiO2/PAG nanolubricants with different nanoparticle ratios
title_sort	experimental investigation on stability and thermo-physical properties of al2o3-sio2/pag nanolubricants with different nanoparticle ratios
publisher	Springer
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/24767/ http://umpir.ump.edu.my/id/eprint/24767/ http://umpir.ump.edu.my/id/eprint/24767/ http://umpir.ump.edu.my/id/eprint/24767/7/Experimental%20investigation%20on%20stability%20and%20thermo-physical%20properties.pdf
first_indexed	2023-09-18T22:37:41Z
last_indexed	2023-09-18T22:37:41Z
_version_	1777416705053556736

Experimental investigation on stability and thermo-physical properties of Al2O3-SiO2/PAG nanolubricants with different nanoparticle ratios

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