GREEN ENGINE COOLANT (GEC): CELLULOSE NANOCRYSTALS AS ENGINE COOLANT

1. The research is conducted to prove that addition of nanocellulose originating from plant base with varying concentration provides a better heat transfer efficiency. This environmental friendly material promises to reduce much hazards to human coolant applications.

2. The nanocellulose particle is between ranges of size 35-39 nm. The concentration is for of 0.1%, 0.5%, 0.9% and 1.3% particle additives. A statistical analysis shows that volume concentration 0.5% has an optimized thermophysical property from the design of experiments.

3. The experimental heat transfer coefficient, convective heat transfer, Reynolds number, Nusselt number has proportional relation with volumetric flow rate.

4. Thermal conductivity data it shows thermal conductivity increases from 0.487 W/m. °C at 30°C to 0.532 W/m. °C at 70°C while the viscosity decreases from 15.01 m.Pa.s at 30°C to 1.77 m.Pa.s at 70°C.

5. Thus, nanocellulose based nanofluid is suitable for automotive cooling application since it has a better heat transfer
performance than conventional thermal transport fluid with environmental impacts.