Experimental study on heat transfer performance of a series combined microchannel heat dissipation system based on Al2O3 nanofluid

Abstract

The thermal power of each subsystem of loaders is relatively high, and the machine performance is seriously affected by temperature changes of each component. Therefore, developing an efficient heat dissipation system is of great significance for improving the working performance of the machine. In this paper, a pioneering series combined microchannel heat dissipation system with microchannel heat sinks as the principal components is proposed, and the feasibility was verified through experiments. Results show that the number of microchannel heat sink series combinations and the fan control voltage can be adjusted according to the feedback of the real-time temperature and flow rate parameters of the working medium under different working conditions of the system, which can improve the heat exchange efficiency and reduce the energy consumption. Furthermore, the incorporation of Al2O3 nanoparticles into the working medium yields a substantial improvement in the heat transfer performance of the system. Relative to pure water, the system utilizing an Al2O3 nanofluid with a mass fraction of 0.7% demonstrates a noteworthy 11.17% enhancement in heat transfer power and a commendable 6.40% increase in energy consumption ratio. This study holds significant importance in the exploration of an efficient and energy-saving heat dissipation system for loaders.