Tang, JiaweiLuk, Patrick Chi-Kwong2024-02-202024-02-202023-09-06Tang J, Luk PC. (2023) Microscale electromagnetic actuation of ferrofluid for enhanced cooling efficiency. In: 2023 IEEE International Electric Machines & Drives Conference (IEMDC), 15-18 May 2023, San Francisco, CA, USA979-8-3503-9900-4https://doi.org/10.1109/IEMDC55163.2023.10239087https://dspace.lib.cranfield.ac.uk/handle/1826/20833Efficient cooling solutions can greatly enhance the performance and reliability of electronic systems. Traditional cooling methods have been well-developed, but most are based on not highly efficient cost-effective conduction heat exchange. Improving heat exchange efficiency at low cost is a crucial task for all cooling applications. In this paper, we propose a novel method to improve heat exchange efficiency based on ferrofluid, a fluid with ferromagnetic properties, as a coolant. As a result, conduction heat exchange can be easily transformed into convection heat exchange in a passive manner with no additional energy required, significantly increasing cooling efficiency at a relatively low cost. A cooling system using ferrofluid as a coolant is designed and applied to a multi-junction ,or concentrated, photovoltaic and thermal (CPV/T) system through CFD modelling. Novel unsteady flow is generated resulting in higher thermal efficiency. Since ferrofluid is a nanoparticle, the proposed cooling method can be downsized to micro- or nano-scales for potential applications in many new areas.enAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/Special MachinesElectromagnetic Actuators and Sensorsferrofluidthermal managementcooling systemCPVConference paper979-8-3503-9899-1