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Variable Performance Self Regulating Turbulator Design

IP.com Disclosure Number: IPCOM000079112D
Original Publication Date: 1973-May-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Chu, RC: AUTHOR

Abstract

The turbulator concept has been effective in improving external thermal resistance of heat dissipating components. The turbulators 10 shown in Fig. 1 are placed in the air stream to cause desired air turbulence, which has been found to considerably improve the forced air cooling efficiency. This turbulator design enables the turbulator to self-regulate its performance as a function of air temperature. That is, when air temperature rises, the turbulator will provide improved performance.

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Variable Performance Self Regulating Turbulator Design

The turbulator concept has been effective in improving external thermal resistance of heat dissipating components. The turbulators 10 shown in Fig. 1 are placed in the air stream to cause desired air turbulence, which has been found to considerably improve the forced air cooling efficiency. This turbulator design enables the turbulator to self-regulate its performance as a function of air temperature. That is, when air temperature rises, the turbulator will provide improved performance.

There are two arrangements of the temperature-sensitive turbulator shown in Fig. 2. In the first design, the turbulator 10 is made of a soft plastic material and is partially filled with a low-boiling point liquid. When the temperature of the air stream is below the boiling point temperature of the liquid, the partially filled plastic turbulator will be blown upward and adheres to the cover, as shown in position 1 of Fig. 2. When the temperature exceeds the boiling point of the liquid, evaporation of the liquid takes place and the turbulator will be activated, as shown in position 2.

The second design shown in Fig. 2 employs the same principle, except that a liquid filled actuator is used to activate the turbulator. The turbulator itself is made of a fixed stiff material and is pushed out into the air stream by the actuator. The actuator is a cylindrical device which is partially filled with a low- boiling point liquid. The op...