Dielectrophoretic Cooling for Electronics Heat Dissipation
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Solution Overview
Problem
Current thermal management solutions for high power density electronics are insufficient, as passive cooling methods are no longer effective, and mechanical pumps introduce reliability issues and noise.
Innovation Solution
A dielectrophoretic cooling system is implemented, where a dielectric fluid in cooling channels with strategically positioned electrodes creates a dielectrophoretic force to move bubbles downstream, enhancing heat transfer by varying the electric field magnitude along the channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If passive cooling is used, then device simplicity is maintained, but heat dissipation capability becomes insufficient for high power density electronics
Solution Approach 1:
The patent replaces mechanical pumping systems with dielectrophoretic forces generated by electric fields to drive bubble motion. This substitution eliminates mechanical complexity while achieving active cooling, resolving the contradiction between maintaining simplicity and improving heat dissipation capability for high power density electronics
Solution Approach 2:
The patent utilizes phase change of the dielectric fluid (liquid to vapor bubble formation) to enhance heat transfer. By changing the physical state parameter of the cooling fluid, the system achieves superior heat dissipation capability compared to passive liquid cooling, while maintaining system simplicity through natural phase change dynamics
2Power
If mechanical pumps are used for fluid circulation, then heat transfer is enhanced, but reliability decreases due to mechanical failure points and noise increases
Solution Approach 1:
The patent replaces mechanical pumps with dielectrophoretic actuation using electric fields. This eliminates moving mechanical parts that cause failure, noise, and vibration, while still achieving active fluid circulation and enhanced heat transfer efficiency through bubble-driven flow mechanisms
Solution Approach 2:
The system uses the heat generated by electronic devices to naturally generate vapor bubbles that drive the cooling flow. This self-service mechanism eliminates the need for external mechanical pumping, improving reliability while maintaining effective heat transfer through the self-sustaining bubble circulation cycle
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively manages heat in electronic components without the need for complex structures, improving thermal efficiency and reducing noise and vibration issues associated with mechanical pumps.
Implementation Method 1
A voltage potential is applied to the at least one electrode pair such that an electric field magnitude at the downstream end of the cooling channel is less than an upstream electric field magnitude, and such that a dielectrophoretic force on a bubble in the cooling channel will force it downstream.
Implementation Method 2
The cooling channel is positioned adjacent to an electronic component... A dielectric fluid is received in the cooling channel... This approach effectively manages heat dissipation in electronic components
Data Source
AI summary
At least one cooling channel is positioned adjacent to an electronic component. The cooling channel communicates with plenums at each of two opposed axial ends. A dielectric fluid is received in the cooling channel. The cooling channel is provided with at least one electrode. A potential is applied to the at least one electrode such that an electric field magnitude at the downstream end of the channel is less than an upstream electric field magnitude, and such that a dielectrophoretic force on a bubble in the cooling channel will force it downstream.