Development of water-ethylene glycol based graphene nanoplatelets/cellulose nanocrystal hybrid nanofluid as radiator coolants and its performance evaluation

Traditional thermal fluids are incapable of absorbing the significant amount of heat generated by high performance engines. Greater engine performance requires extra consumed fuel, exposing combustion chambers to excessive heat. An automotive cooling system is designed to maintain the engine tempera...

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Main Author:	Madderla, Sandhya
Format:	Thesis
Language:	English
Published:	2023
Subjects:	TA Engineering (General) Civil engineering (General) TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/39260/1/ir.Development%20of%20water-ethylene%20glycol%20based%20graphene%20nanoplatelets%20cellulose%20nanocrystal%20hybrid%20nanofluid.pdf
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spelling	my-ump-ir.392602023-11-09T06:45:32Z Development of water-ethylene glycol based graphene nanoplatelets/cellulose nanocrystal hybrid nanofluid as radiator coolants and its performance evaluation 2023-05 Madderla, Sandhya TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery Traditional thermal fluids are incapable of absorbing the significant amount of heat generated by high performance engines. Greater engine performance requires extra consumed fuel, exposing combustion chambers to excessive heat. An automotive cooling system is designed to maintain the engine temperature at optimal levels. With the rapid growth of technology in the automotive industry, there is a need to increase the performance of conventional cooling systems to improve engine performance. Radiator plays a prominent role in increasing the performance of the cooling system. However, there is a demand for higher thermal properties fluid as the transport medium because of the insufficient thermal performance of traditional fluids. Hybrid nanofluids are exceptional heat transfer liquids due to their superior thermal conductivity. An experimental approach to prepare, characterize and stabilize the hybrid nanoparticles (Graphene nanoplatelets and Cellulose nanocrystals-50:50) in the base fluid (Ethylene Glycol-Water-60:40)) and to analyze the thermo-physical properties of the newly developed hybrid nanofluids and this is used as a coolant in automobile radiators. Combining with the coupling effect of two nanomaterials, the prepared hybrid nanofluids confirmed the proper dispersion stability by Zeta potential and UV absorption analysis and also enhanced the thermal conductivity with the increase in the volume concentration from 0.01%-0.2%. The maximum enhancement for thermal conductivity was around 27% attained at 0.2% hybrid nanofluid. With the increase in the particle loading, the viscosity increased but declined with the temperature by 21%. Moreover, the specific heat is decreased with the increment of hybrid nanofluid concentration. The results from the statistical analysis showed 0.2% GNP/CNC hybrid nanofluid as the optimum concentration for radiator application. The experimental results at different flow rates for hybrid nanofluid (0.2% volume concentration) presented a 41.44% improvement for convective heat transfer coefficient as a result of improved thermal conductivity and surface area and 12.34% pressure drop with respect to base fluid, with an increased density and viscosity the Reynolds number increased with the flow rate and obtained value is 3863.55. With the particle loading, the physical characteristics influenced Nusselt number enhancement with 26.77% for the proposed hybrid nanofluid at 7.2 LPM. Further, the size reduction analysis from computational modeling recommended the reduced dimensions for the flat radiator tube (major diameter-0.016m and length-0.24m) for increased heat transfer coefficient at decreased volume concentration (0.01% GNP/CNC). These outcomes show the overall thermal improvement of the radiator cooling system, which can reduce the dimensions (size and weight) of the radiator by the application of a novel hybrid nanofluid. Novel hybrid graphene nanoplatelets/ cellulose nanocrystal-based hybrid nanofluids performed better in automobile applications and are recommended for heat transfer enhancement in automotive industry. 2023-05 Thesis http://umpir.ump.edu.my/id/eprint/39260/ http://umpir.ump.edu.my/id/eprint/39260/1/ir.Development%20of%20water-ethylene%20glycol%20based%20graphene%20nanoplatelets%20cellulose%20nanocrystal%20hybrid%20nanofluid.pdf pdf en public phd doctoral Universiti Malaysia Pahang Faculty of Mechanical and Automotive Engineering Technology Devarajan, Ramasamy
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
advisor	Devarajan, Ramasamy
topic	TA Engineering (General) Civil engineering (General) TJ Mechanical engineering and machinery
spellingShingle	TA Engineering (General) Civil engineering (General) TJ Mechanical engineering and machinery Madderla, Sandhya Development of water-ethylene glycol based graphene nanoplatelets/cellulose nanocrystal hybrid nanofluid as radiator coolants and its performance evaluation
description	Traditional thermal fluids are incapable of absorbing the significant amount of heat generated by high performance engines. Greater engine performance requires extra consumed fuel, exposing combustion chambers to excessive heat. An automotive cooling system is designed to maintain the engine temperature at optimal levels. With the rapid growth of technology in the automotive industry, there is a need to increase the performance of conventional cooling systems to improve engine performance. Radiator plays a prominent role in increasing the performance of the cooling system. However, there is a demand for higher thermal properties fluid as the transport medium because of the insufficient thermal performance of traditional fluids. Hybrid nanofluids are exceptional heat transfer liquids due to their superior thermal conductivity. An experimental approach to prepare, characterize and stabilize the hybrid nanoparticles (Graphene nanoplatelets and Cellulose nanocrystals-50:50) in the base fluid (Ethylene Glycol-Water-60:40)) and to analyze the thermo-physical properties of the newly developed hybrid nanofluids and this is used as a coolant in automobile radiators. Combining with the coupling effect of two nanomaterials, the prepared hybrid nanofluids confirmed the proper dispersion stability by Zeta potential and UV absorption analysis and also enhanced the thermal conductivity with the increase in the volume concentration from 0.01%-0.2%. The maximum enhancement for thermal conductivity was around 27% attained at 0.2% hybrid nanofluid. With the increase in the particle loading, the viscosity increased but declined with the temperature by 21%. Moreover, the specific heat is decreased with the increment of hybrid nanofluid concentration. The results from the statistical analysis showed 0.2% GNP/CNC hybrid nanofluid as the optimum concentration for radiator application. The experimental results at different flow rates for hybrid nanofluid (0.2% volume concentration) presented a 41.44% improvement for convective heat transfer coefficient as a result of improved thermal conductivity and surface area and 12.34% pressure drop with respect to base fluid, with an increased density and viscosity the Reynolds number increased with the flow rate and obtained value is 3863.55. With the particle loading, the physical characteristics influenced Nusselt number enhancement with 26.77% for the proposed hybrid nanofluid at 7.2 LPM. Further, the size reduction analysis from computational modeling recommended the reduced dimensions for the flat radiator tube (major diameter-0.016m and length-0.24m) for increased heat transfer coefficient at decreased volume concentration (0.01% GNP/CNC). These outcomes show the overall thermal improvement of the radiator cooling system, which can reduce the dimensions (size and weight) of the radiator by the application of a novel hybrid nanofluid. Novel hybrid graphene nanoplatelets/ cellulose nanocrystal-based hybrid nanofluids performed better in automobile applications and are recommended for heat transfer enhancement in automotive industry.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Madderla, Sandhya
author_facet	Madderla, Sandhya
author_sort	Madderla, Sandhya
title	Development of water-ethylene glycol based graphene nanoplatelets/cellulose nanocrystal hybrid nanofluid as radiator coolants and its performance evaluation
title_short	Development of water-ethylene glycol based graphene nanoplatelets/cellulose nanocrystal hybrid nanofluid as radiator coolants and its performance evaluation
title_full	Development of water-ethylene glycol based graphene nanoplatelets/cellulose nanocrystal hybrid nanofluid as radiator coolants and its performance evaluation
title_fullStr	Development of water-ethylene glycol based graphene nanoplatelets/cellulose nanocrystal hybrid nanofluid as radiator coolants and its performance evaluation
title_full_unstemmed	Development of water-ethylene glycol based graphene nanoplatelets/cellulose nanocrystal hybrid nanofluid as radiator coolants and its performance evaluation
title_sort	development of water-ethylene glycol based graphene nanoplatelets/cellulose nanocrystal hybrid nanofluid as radiator coolants and its performance evaluation
granting_institution	Universiti Malaysia Pahang
granting_department	Faculty of Mechanical and Automotive Engineering Technology
publishDate	2023
url	http://umpir.ump.edu.my/id/eprint/39260/1/ir.Development%20of%20water-ethylene%20glycol%20based%20graphene%20nanoplatelets%20cellulose%20nanocrystal%20hybrid%20nanofluid.pdf
_version_	1783732304585162752

Development of water-ethylene glycol based graphene nanoplatelets/cellulose nanocrystal hybrid nanofluid as radiator coolants and its performance evaluation

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