Investigation of Thermal Conductivity and Viscosity of Al2O3/Water-Ethylene Gylcol Mixture Nanocoolant for Cooling Channel of Hot-press Forming Die Application

Hot-press forming process is widely used to produce lightweight chassis in automotive industries. The hot-press forming process currently uses water as coolant to quench boron steels in a closed die with a cooling channel. However, to enhance performance of hot-press forming die, the fluid with bett...

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Main Authors:	S. K., Lim, Azmi, W. H., A. R., Yusoff
Format:	Article
Language:	English
Published:	Elsevier 2016
Subjects:	TJ Mechanical engineering and machinery TS Manufactures
Online Access:	http://umpir.ump.edu.my/id/eprint/14656/ http://umpir.ump.edu.my/id/eprint/14656/ http://umpir.ump.edu.my/id/eprint/14656/ http://umpir.ump.edu.my/id/eprint/14656/1/fkm-2016-whazmi-Investigation%20of%20thermal%20conductivity1.pdf

id	ump-14656
recordtype	eprints
spelling	ump-146562019-10-30T08:02:37Z http://umpir.ump.edu.my/id/eprint/14656/ Investigation of Thermal Conductivity and Viscosity of Al2O3/Water-Ethylene Gylcol Mixture Nanocoolant for Cooling Channel of Hot-press Forming Die Application S. K., Lim Azmi, W. H. A. R., Yusoff TJ Mechanical engineering and machinery TS Manufactures Hot-press forming process is widely used to produce lightweight chassis in automotive industries. The hot-press forming process currently uses water as coolant to quench boron steels in a closed die with a cooling channel. However, to enhance performance of hot-press forming die, the fluid with better thermal properties will be used instead of normal water. This study dispersed Al2O3 nanoparticles with an average diameter of 13 nm in three volume percentages base ratios of water (W) to ethylene glycol (EG) (i.e. 60:40, 50:50, and 40:60) by two-step preparation. The two main parameters in cooling rate performance are thermal conductivity and viscosity. The nanocoolant of Al2O3/water–ethylene glycol mixture is prepared for the volume concentration range of 0.2 to 1.0%. The thermal conductivity and viscosity are then measured at temperature range of 15 to 55 °C. The highest enhancement of thermal conductivity was observed to be 10% higher than base fluid for 1.0% volume concentration at 55 °C in 60:40 (W/EG). However, the highest enhancement of viscosity was measured to be 39% for 1.0% volume concentration in 40:60 (W/EG) at 25 °C. The convective heat transfer coefficient of 1.0% concentration in 60:40 (W:EG) at 25 °C is enhanced by 25.4% better than that of 50:50 and 40:60 (W:EG) base fluid. Therefore, this study recommends the use of Al2O3 in 60:40 (W:EG) mixture with volume concentration of less than 1.0% for application in cooling channel of hot-press forming die. Nanocoolant as cooling agent with higher heat transfer coefficient compared to the base fluid can reduce the cycle time and increase the productivity of hot-press forming process. Elsevier 2016 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/14656/1/fkm-2016-whazmi-Investigation%20of%20thermal%20conductivity1.pdf S. K., Lim and Azmi, W. H. and A. R., Yusoff (2016) Investigation of Thermal Conductivity and Viscosity of Al2O3/Water-Ethylene Gylcol Mixture Nanocoolant for Cooling Channel of Hot-press Forming Die Application. International Communications in Heat and Mass Transfer, 78. pp. 182-189. ISSN 0735-1933 http://dx.doi.org/10.1016/j.icheatmasstransfer.2016.09.018 DOI: 10.1016/j.icheatmasstransfer.2016.09.018
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 TS Manufactures
spellingShingle	TJ Mechanical engineering and machinery TS Manufactures S. K., Lim Azmi, W. H. A. R., Yusoff Investigation of Thermal Conductivity and Viscosity of Al2O3/Water-Ethylene Gylcol Mixture Nanocoolant for Cooling Channel of Hot-press Forming Die Application
description	Hot-press forming process is widely used to produce lightweight chassis in automotive industries. The hot-press forming process currently uses water as coolant to quench boron steels in a closed die with a cooling channel. However, to enhance performance of hot-press forming die, the fluid with better thermal properties will be used instead of normal water. This study dispersed Al2O3 nanoparticles with an average diameter of 13 nm in three volume percentages base ratios of water (W) to ethylene glycol (EG) (i.e. 60:40, 50:50, and 40:60) by two-step preparation. The two main parameters in cooling rate performance are thermal conductivity and viscosity. The nanocoolant of Al2O3/water–ethylene glycol mixture is prepared for the volume concentration range of 0.2 to 1.0%. The thermal conductivity and viscosity are then measured at temperature range of 15 to 55 °C. The highest enhancement of thermal conductivity was observed to be 10% higher than base fluid for 1.0% volume concentration at 55 °C in 60:40 (W/EG). However, the highest enhancement of viscosity was measured to be 39% for 1.0% volume concentration in 40:60 (W/EG) at 25 °C. The convective heat transfer coefficient of 1.0% concentration in 60:40 (W:EG) at 25 °C is enhanced by 25.4% better than that of 50:50 and 40:60 (W:EG) base fluid. Therefore, this study recommends the use of Al2O3 in 60:40 (W:EG) mixture with volume concentration of less than 1.0% for application in cooling channel of hot-press forming die. Nanocoolant as cooling agent with higher heat transfer coefficient compared to the base fluid can reduce the cycle time and increase the productivity of hot-press forming process.
format	Article
author	S. K., Lim Azmi, W. H. A. R., Yusoff
author_facet	S. K., Lim Azmi, W. H. A. R., Yusoff
author_sort	S. K., Lim
title	Investigation of Thermal Conductivity and Viscosity of Al2O3/Water-Ethylene Gylcol Mixture Nanocoolant for Cooling Channel of Hot-press Forming Die Application
title_short	Investigation of Thermal Conductivity and Viscosity of Al2O3/Water-Ethylene Gylcol Mixture Nanocoolant for Cooling Channel of Hot-press Forming Die Application
title_full	Investigation of Thermal Conductivity and Viscosity of Al2O3/Water-Ethylene Gylcol Mixture Nanocoolant for Cooling Channel of Hot-press Forming Die Application
title_fullStr	Investigation of Thermal Conductivity and Viscosity of Al2O3/Water-Ethylene Gylcol Mixture Nanocoolant for Cooling Channel of Hot-press Forming Die Application
title_full_unstemmed	Investigation of Thermal Conductivity and Viscosity of Al2O3/Water-Ethylene Gylcol Mixture Nanocoolant for Cooling Channel of Hot-press Forming Die Application
title_sort	investigation of thermal conductivity and viscosity of al2o3/water-ethylene gylcol mixture nanocoolant for cooling channel of hot-press forming die application
publisher	Elsevier
publishDate	2016
url	http://umpir.ump.edu.my/id/eprint/14656/ http://umpir.ump.edu.my/id/eprint/14656/ http://umpir.ump.edu.my/id/eprint/14656/ http://umpir.ump.edu.my/id/eprint/14656/1/fkm-2016-whazmi-Investigation%20of%20thermal%20conductivity1.pdf
first_indexed	2023-09-18T22:18:38Z
last_indexed	2023-09-18T22:18:38Z
_version_	1777415506700009472

Investigation of Thermal Conductivity and Viscosity of Al2O3/Water-Ethylene Gylcol Mixture Nanocoolant for Cooling Channel of Hot-press Forming Die Application

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