Boiling Plate Cone Cavity Layout for Low-Temperature Nucleation
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Solution Overview
Problem
Conventional cold plates in liquid cooling systems have inefficient nucleation sites that are not activated at lower boiling temperatures, leading to poor heat dissipation and inefficient bubble formation, especially in smaller electronic components.
Innovation Solution
A boiling plate with multiple cone-shaped cavities on its surface, designed to enhance nucleation sites by controlling bubble formation and heat transfer, using a honeycomb pattern and varying cavity sizes and densities to match heat distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional nucleation sites are used on cold plates, then the structure is simple and easy to manufacture, but bubble formation is poor and heat dissipation efficiency is low
Solution Approach 1:
The patent applies porous materials by creating cone-shaped cavities with specific geometries (radius 5-50 μm, depth 10-100 μm) on the cold plate surface. These porous structures serve as effective nucleation sites that activate at lower superheating temperatures, enabling efficient bubble formation and heat dissipation while maintaining manufacturing feasibility through techniques like laser drilling or chemical etching.
Solution Approach 2:
The patent changes the geometric parameters of nucleation sites by specifying cone-shaped cavities with controlled radius (5-50 μm) and depth (10-100 μm). This parameter optimization ensures that bubbles form at lower superheating temperatures (0.5-2°C), significantly improving heat dissipation efficiency compared to conventional flat or randomly structured surfaces.
2Temperature
If conventional nucleation sites are used, then manufacturing is simple, but nucleation sites are not activated at lower boiling temperatures
Solution Approach 1:
The cone-shaped porous cavities with specific dimensions enable nucleation site activation at lower temperatures. The controlled geometry creates capillary effects and reduces the energy barrier for bubble formation, allowing activation at superheating temperatures of only 0.5-2°C above saturation, while remaining manufacturable through standard industrial processes.
Solution Approach 2:
The nucleation sites are pre-formed during the cold plate manufacturing process through laser drilling, chemical etching, or mechanical machining. This preliminary creation of optimized cone-shaped cavities ensures that nucleation occurs at the desired lower temperatures without requiring additional complex post-processing steps.
3Productivity
If nucleation sites are not properly activated, then the system is simpler to operate, but heat transfer efficiency is poor
Solution Approach 1:
By optimizing the geometric parameters of the cone-shaped cavities (radius 5-50 μm, depth 10-100 μm), the system achieves efficient heat transfer at lower operating temperatures. The specific geometry ensures proper wetting and bubble departure characteristics, maximizing heat transfer efficiency without requiring complex operational controls or adjustments.
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 cone-shaped cavities on the boiling plate ensure efficient and early onset boiling, optimizing heat transfer by activating nucleation sites at lower temperatures, thereby improving cooling efficiency.
Implementation Method 1
The cone-shaped cavities on the surface act as nucleation sites, ensuring efficient and early onset boiling
Implementation Method 2
optimizing heat transfer by activating nucleation sites at lower temperatures, thereby improving cooling efficiency
Implementation Method 3
A boiling plate with multiple cone-shaped cavities on its surface, designed to enhance nucleation sites by controlling bubble formation and heat transfer
Data Source
AI summary
A boiling plate including a first surface and a second surface. The first surface provided for contacting a heated component. The second surface is opposite the first surface, and the second surface provided for contacting a liquid medium. The second surface has multiple cone-shaped cavities including a first cone-shaped cavity and a second cone-shaped cavity. A distance between an axis of the first cone-shape cavity and an axis of the second cone-shaped cavity of the multiple cone-shaped cavities are separated by a minimum spacing of four times a radius of the first cone-shaped cavity or the second cone-shaped cavity.