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International Heat Transfer Conference 12

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Least-Energy Optimization of Air Cooled Heat Sinks

Madhusudan Iyengar
Laboratory of the Thermal Management of Electronics, Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA

Avram Bar-Cohen
Laboratory of the Thermal Management of Electronics, Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455; and Defense Advanced Research Projects Agency (DARPA), Microsystems Technology Office, University of Maryland, College Park, MD

要約

The least-energy optimization of natural and forced-convection plate-fin heat sinks is described. Emphasis is placed on the use of a Coefficient of Performance, COPT, relating cooling capability to the energy invested in the formation, fabrication, and operation of the heat sink. It is shown possible to determine the heat sink geometry, which maximizes the value of COPT, for each operating condition and cooling mode. For forced convection cooling, the most favorable distribution of invested energy - between heat sink formation/fabrication and operation - can also be found. Although optimum natural convection heat sinks can deliver highly reliable, noise-free, operation, the COPT values for forced convection cooled heat sinks are found to far exceed the values associated with passive cooling.

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