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Abstract

Improved efficiency leads to more compact design of the radiator. The research is conducted to prove that addition of Aluminium Oxide and nanocellulose originating from plant base with varying concentration provides a better thermal efficiency compared to usage of distilled water as radiator coolant. The objective of the research is to improve a new radiator coolant based on combination of aluminium oxide and nanocellulose with readily available coolants which is Ethylene Glycol and to investigate the erosion of nanocellulose coolant on automotive radiator. The scope of the research are the nanocellulose dispersed in base fluid which is from 60:40, (EG:W). The volume concentration of the tested nanocellulose are as of 0.1%, 0.5%, and 0.9% of concentration volume. The preparation of cellulose nanofluids are carried out at Advance Automotive Liquid Lab (A2LL) of University Malaysia Pahang. Then, experiment for heat transfer performance comparison for nanofluid and convection thermal transport fluid is conducted in the automotive radiator test rig. Experiment for heat transfer analysis is conducted under two different circumstances without a draft fan and with a draft fan for forced convection. The experiment result shows that experimental heat transfer coefficient, convective heat transfer, Reynolds number, Nusselt number has proportional relation with volumetric flow rate. Also, from the thermal conductivity data it increases from 0.514 W/m. °C at 30°C to 0.539 W/m. °C at 70°C while the viscosity decreases from 5.51 m.Pa.s at 30°C to 2.85 m.Pa.s at 70°C. Thus, the nanofluid able to remove heat efficiently in automotive cooling system.

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