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Macro particle heat transfer fluid

IP.com Disclosure Number: IPCOM000235017D
Publication Date: 2014-Feb-24
Document File: 2 page(s) / 37K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a heat sink designed to allow large balls to flow in cooling channels as a method of improving the heat transfer coefficient.

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This is the abbreviated version, containing approximately 100% of the total text.

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Macro particle heat transfer fluid

Known ways to improve the heat transfer coefficient result in increased fluid pressure drop and increased manufacturing costs due to small and complex flow passage.

A design is needed to improve liquid cooled heat sinks for test and burn-in.

The novel design for a heat sink allows large balls to flow in the cooling channels. The balls improve the heat transfer coefficient by disturbing the thermal and hydrodynamic boundary layers. Further improvement is gained by using metallic balls due to the increased mass flow rate through the tubes. Metallic or ceramic balls may have higher mass and more specific heat than the fluid it replaces.

The balls are close to the diameter of the fluid passages, and the passing balls disturb the fluid boundary layers. The cooling fluid may be either a gas or liquid and either insulating or conductive. The balls may be moved by mechanical or magnetic means.

The following figures illustrate the improvement in thermal performance with the introduction of balls to the fluid flow. The balls may also serve other purposes in the structure such as acting as bearings. Adding balls reduces the volume of fluid and thus

reduces possibility of damage from freezing.

Figure 1: Example results

Figure 2: Experimental Apparatus

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