Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
INFLUENCE OF WORKING FLUID ON MICRO-PIN FIN HEAT SINKS UNDER SINGLE-PHASE FLOW CONDITIONS
Submission Author:
Ariany Moreira , SP
Co-Authors:
Ariany Moreira, Bruno de Andrade, Jessica Martha Nunes, Elaine Maria Cardoso
Presenter: Ariany Moreira
doi://10.26678/ABCM.COBEM2023.COB2023-0730
Abstract
Micro-pin fins have been used in thermal management systems due to their ability to improve the heat transfer coefficient. The effectiveness of micro-pin fins heat sinks can be affected by factors such as the size and shape of the pins, the spacing between the pins, and the flow rate and fluid properties. Optimizing these parameters is important to ensure the best micro-pin fin performance in many applications, such as microelectronics, energy conversion, and aerospace engineering. Therefore, this work aims to analyze the influence of two different working fluids, HFE-1000 and DI water, on micro-pin fin heat sinks under single-phase flow conditions. The working fluid flows across staggered diamond-shaped pin fins. Square micro pin fins, with 300 μm width, 350 μm height and 250 μm inter-fin space, were manufactured on a copper substrate using the micro-milling process. The single-phase flow tests were performed at different mass fluxes, and the hydrodynamic effects (pressure drop) and thermal performance were investigated. The results showed that the working fluid properties affect flow behavior and pressure drop. Even with the highest pressure drop, the heat transfer coefficient is improved for DI water, which may be due to the higher thermophysical properties compared to the HFE-7100. Such heat transfer gain compensates the increase in the flow resistance
Keywords
micro pin fins, Heat transfer coefficient, pressure drop, deionized water
