An Innovative Solution to Enhance the Performance of Classical Heat Exchanger for Cooling Devices
Résumé
The reliability and lifetime of many systems are very strongly related to the quality of the thermal management in many applications such as micro-and power-electronics or embedded systems. Recent technological advances lead to the development of miniaturised thermal systems. Improvement of thermo-hydraulic performance of such systems remains a great challenge. In this view, a future solution to enhance the overall performance of mini-channel heat exchanger at millimetre scale has been proposed to replace classical heat exchangers. It consists in dynamically deforming at least one of the walls in order to obtain a progressive corrugated channel. A systematic study on the different deformation parameters allowed obtaining the fluid flow and heat transfer characteristics of the system. 3-D numerical simulations were performed using commercial software based on the finite volume element in transient regime. It was observed that the dynamic deformation of the wall improves significantly the merit factor of the proposed system compared to straight and flat channel.