Composite Immersion Heat Sink Layout for Boiling and Conduction
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Solution Overview
Problem
Existing immersion cooling technologies face challenges in effectively dissipating heat due to the absence of nucleation sites for bubble generation when using fins, and poor thermal conduction along a vertical direction when using porous structures.
Innovation Solution
A two-phase immersion-type composite heat dissipation device is designed, featuring a heat dissipation substrate with fins in the high-temperature region and a surface porous layer in the low-temperature region, enhancing thermal conductivity and nucleation sites for bubble generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat dissipation fins are used in cooperation with the coolant, then thermal conduction along vertical direction is enhanced, but nucleation sites for bubble generation are absent
Solution Approach 1:
The patent applies local quality by using different structures in different regions: fins are placed in the high-temperature region for thermal conduction, while a porous layer is placed in the low-temperature region for bubble nucleation. This regional differentiation resolves the contradiction by optimizing each area for its specific function.
Solution Approach 2:
The heat dissipation surface is segmented into two distinct zones: a high-temperature region with fins and a low-temperature region with a porous layer. This segmentation allows each zone to perform its specialized function, with fins handling thermal conduction and the porous layer providing nucleation sites.
2Reliability
If a porous structure is used in cooperation with the coolant, then nucleation sites for bubble generation increase in number, but thermal conduction along vertical direction is decreased
Solution Approach 1:
The porous structure is applied locally only in the low-temperature region where it is needed for nucleation, while the high-temperature region maintains fins for thermal conduction. This localized application eliminates the thermal conduction penalty in the critical heat transfer zone.
Solution Approach 2:
The heat dissipation surface is segmented into a high-temperature region with fins and a low-temperature region with porous structure. This segmentation isolates the porous material to areas where thermal conduction is less critical, allowing it to provide nucleation sites without compromising overall thermal performance.
3Productivity
If both fins and porous structure are used, then overall heat dissipation effect is improved, but device structure becomes more complex
Solution Approach 1:
The patent merges fins and porous structure into a single integrated heat dissipation device with a unified substrate. Both structures are attached to the same base plate and work together as one system, achieving synergistic heat dissipation while maintaining manufacturing feasibility.
Solution Approach 2:
Rather than making the entire surface complex, the patent uses local quality by applying the porous structure only in specific low-temperature regions while maintaining simple fin structures in high-temperature areas, thus achieving enhanced performance with minimal added complexity.
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
The combination of fins and a surface porous layer improves the overall immersion-type heat dissipation effect by increasing nucleation sites and enhancing thermal conductivity, leading to more effective heat removal.
Implementation Method 1
the heat-dissipation fins can enhance a thermal conductive property along a vertical direction
Implementation Method 2
When a porous structure of the surface porous layer is used in cooperation with a coolant, nucleation sites for bubble generation can be increased in number
Implementation Method 3
heat energy generated from operation of the heat producing elements is removed through an endothermic gasification process of the coolant
Implementation Method 4
heat energy generated from operation of the heat producing elements is removed through an endothermic gasification process of the coolant
Data Source
AI summary
A two-phase immersion-type composite heat dissipation device is provided, which includes a heat dissipation substrate, a plurality of fins, and a surface porous layer. The heat dissipation substrate has a first surface and a second surface. The first surface is configured to be in contact with a heat source, and the second surface is opposite to the first surface and is distant from the heat source. A projection region of the heat dissipation substrate that corresponds to the heat source is defined as a high-temperature region, and a low-temperature region is defined at an outer periphery of the high-temperature region. The fins are opposite to the heat source, and are disposed within the high-temperature region of the second surface of the heat dissipation substrate. The surface porous layer is disposed within a range of the low-temperature region of the heat dissipation substrate.