Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

OPTIMISATION OF MICRO-CHANNEL HEAT SINK GEOMETRY

Get access (open in a dialog) DOI: 10.1615/IHTC13.p14.170
12 pages

Abstrakt

The study of fluid flow and heat transfer in micro channels is currently gaining importance as the trend towards miniaturisation of electronic equipment dictates small-scale cooling components. Downscaling cooling channels has an important influence on pressure drops and heat transfer in the laminar liquid flow through these micro channels. Therefore, well designed micro cooling components are indispensable. Micro-channel heat sinks are considered a high performance cooling method. Optimisation of the channel geometries for these heat sinks is therefore recommended.
In this paper the optimisation of a micro-channel heat sink for a 10×10mm chip is discussed in more detail. Heat sink optimisation is performed with respect to minimal thermal resistance. The optimal number of channels as well as the optimal channel dimensions are determined. Therefore, analytical models are developed, taking into account both infinite and limited heat conduction. A constant heat sink area as well as a constant heat sink volume optimisation are performed. The latter is found to be required in order to achieve practical applicable heat sink measures. Maximal channel height and minimal wall thickness are thereby important constraints as they determine the feasibility of manufacturing and influence the optimal heat sink geometry. A simple explicit equation for the optimal hydraulic diameter of the channels and for the wall thickness is found to be valid as a design tool. Furthermore, the influence of entrance effects on the heat sink optimisation is considered to be important, as they largely affect the optimal heat sink geometry.