Two-Phase Immersion Cooling with Asymmetric Fins for Vapor Evacuation
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Solution Overview
Problem
Existing two-phase immersion-cooling technologies face challenges in effectively dissipating heat generated by heat sources due to inefficient vapor bubble evacuation routes.
Innovation Solution
A two-phase immersion-cooling heat-dissipation structure with a substrate and skived fins, including a functional fin extending lengthwise in the vapor bubble evacuation direction, where the central portion is taller than the end portions, and optionally featuring varying gaps and surface roughness, to enhance bubble evacuation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional immersion-cooling fins are used with uniform height, then manufacturing is simpler, but vapor bubble evacuation efficiency is poor
Solution Approach 1:
The patent applies asymmetry by designing fins with different heights rather than uniform height. Specifically, the heat source area corresponds to a region with shorter fin height, while peripheral areas have taller fins. This asymmetric configuration optimizes vapor bubble evacuation by preventing bubble accumulation at the heat source location while maintaining adequate heat dissipation surface area in cooler regions.
Solution Approach 2:
The patent implements local quality by varying fin height according to local thermal requirements. The fin height is specifically reduced in the region corresponding to the heat source to facilitate vapor bubble evacuation, while maintaining standard or increased height in peripheral regions for enhanced heat dissipation. This localized differentiation resolves the contradiction between evacuation efficiency and heat dissipation performance.
2Productivity
If fin height is increased to enhance heat dissipation surface area, then heat removal capacity improves, but vapor bubble evacuation route becomes longer
Solution Approach 1:
The asymmetric fin height design directly addresses this contradiction by creating shorter fins in the heat source area where vapor generation occurs. This reduces the vertical evacuation route for vapor bubbles, enabling faster escape and preventing bubble accumulation that would otherwise occur with uniformly tall fins. Simultaneously, taller peripheral fins maintain adequate heat dissipation surface area.
Solution Approach 2:
The patent resolves the evacuation route length issue by transitioning from a purely vertical dimension consideration to a two-dimensional spatial arrangement. By strategically positioning shorter fins in specific horizontal locations (heat source area) while maintaining taller fins in other horizontal regions, the design optimizes both evacuation path length and heat dissipation surface area through spatial differentiation.
3Productivity
If uniform gap between fins is maintained, then manufacturing is easier, but heat dissipation uniformity across different regions is poor
Solution Approach 1:
The patent applies local quality by implementing non-uniform gap distances between adjacent fins based on local thermal requirements. Gaps are specifically adjusted in the heat source area to optimize vapor bubble evacuation, while maintaining different gap configurations in peripheral regions. This localized gap differentiation ensures uniform heat dissipation across the entire heat dissipation structure.
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 structure effectively improves heat dissipation by shortening vapor bubble evacuation routes, enhancing the immersion cooling effect and overall heat removal efficiency.
Implementation Method 1
heat generated by the operation of the heat-generating component is removed through an endothermic gasification process of the two-phase coolant
Implementation Method 2
The plurality of immersion-cooling fins include at least one skived fin integrally formed on the first surface of the immersion-cooling substrate by skiving
Data Source
AI summary
A two-phase immersion-cooling heat-dissipation structure having shortened evacuation route for vapor bubbles includes an immersion-cooling substrate having a first surface and a second surface that are opposite to each other and immersion-cooling fins. The second surface contacts a heat source immersed in a two-phase coolant, and the first surface connects to the immersion-cooling fins. The immersion-cooling fins include at least one skived fin integrally formed on the first surface of the immersion-cooling substrate by skiving, and further include at least one functional fin. The functional fin is a single continuous fin extends lengthwise in a vapor bubbles evacuation direction, has a central portion corresponding in position to the heat source and upper and lower end portions located away from the heat source, and a height of the central portion is greater than at least one of a height of the upper and lower end portions.