Investigation on Heat Transfer Properties of Graphene Nanoplatelets Blended Distilled Water-Ethylene Glycol Mixtures in Battery Thermal Management System

<div class="section abstract"><div class="htmlview paragraph">This study investigates the heat transfer properties of graphene nanoplatelets (GnPs) blended with distilled water-ethylene glycol (DW-EG) mixtures, focusing on their potential application in battery thermal management systems (BTMS). Compared to other nanoparticles, carbon nanostructures exhibit higher thermal conductivity due to their low density and integrated thermal conductivity. The experimental findings are relevant in that compared with the base fluid, nanofluid samples had heat transfer capability. The physicochemical characteristics of investigated GNP were characterized using a Scanning Electron Microscope (SEM), pH and UV–Vis spectrophotometry. The thermal conductivity and physical properties of graphene platelets having the specific surface area of 500 m<sup>2</sup>/g in the base fluid of Distilled Water-Ethylene Glycol (DW-EG 70:30) and 100 % vol. of Ethylene Glycol (EG 100) were determined after 120 minutes of sonication time. The graphene nanofluids with the platelet concentrations of 0.025, 0.05, 0.075, and 0.1 wt% were investigated for the dispersion properties. The stability of nanofluid was examined using a zeta potential and UV-visible spectrophotometer. According to the thermal conductivity facts, dispersed nanoparticles always improve the heat conductivity of the DW-EG 70:30s base fluid, with the greatest improvement occurring at a concentration of 0.1 weight per cent GNPs. The study suggests that the GnP-infused nanofluids exhibit excellent heat transfer performance, making them promising candidates for enhancing the efficiency of BTMS in electric vehicles, providing a cost-effective and efficient solution for thermal management.</div></div>