Tapered Wick Junctions for Heat Pipe Networks
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Solution Overview
Problem
In densely packed electronic devices, heat pipe networks face challenges in efficiently distributing heat due to complex wick structures at junctions, leading to potential liquid pooling and disruption of fluid flow, which can result in dry-out and reduced effectiveness.
Innovation Solution
A wick structure with tapered and curved wall portions is designed to minimize interference at junctions, allowing a clear path for liquid flow and reducing the risk of pooling, utilizing additive manufacturing to create complex geometries that facilitate seamless fluid transfer between heat pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If complex wick structures are used at heat pipe junctions, then heat distribution capability is improved, but liquid pooling and fluid flow disruption occur
Solution Approach 1:
The wick structure implements different geometries at different locations: tapered wall portions at junction regions to facilitate smooth liquid flow transition, and curved wall portions in non-junction regions to optimize capillary action. This local differentiation resolves the contradiction by adapting the wick structure's properties to specific functional requirements at different locations.
Solution Approach 2:
The wick structure employs curved wall portions instead of sharp angles or abrupt transitions. The curved profiles create gradual transitions that guide liquid flow smoothly through the junction, preventing pooling while maintaining effective heat distribution across the heat pipe network.
2Strength
If wall portions extend radially inwardly at junctions, then structural support is improved, but vapor core contamination increases
Solution Approach 1:
Curved wall portions are used instead of straight radial extensions. The curved geometry provides structural support while creating a smoother transition that reduces turbulence and prevents liquid from splashing into or contaminating the vapor core, thereby addressing both structural requirements and contamination prevention.
3Adaptability or versatility
If additive manufacturing is used to create complex geometries, then manufacturing flexibility is improved, but manufacturing precision requirements increase
Solution Approach 1:
The design utilizes gradual transitions and smooth curves rather than sharp angles or complex discontinuous geometries. This parameter optimization ensures that additive manufacturing can accurately reproduce the intended geometry while maintaining the functional benefits of complex shapes, balancing manufacturing flexibility with achievable precision.
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 wick structure ensures efficient heat distribution and minimizes contamination of the vapor core, maintaining fluid flow and reducing the risk of dry-out, thereby enhancing the overall performance and reliability of the heat pipe network.
Implementation Method 1
multiple channels defined by wall portions protruding from a first surface of the wick structure and extending in an axial direction along a length of the wick structure
Implementation Method 2
heat conductive capillary grooves in the condenser region that meet with a porous wick in the evaporator section
Implementation Method 3
heat conductive capillary grooves in the condenser region
Implementation Method 4
heat conductive capillary grooves
Data Source
Figure 1
Figure 2(a)~2(c)
Figure 3
AI summary
A wick structure (307) for a heat pipe network, the wick structure (307) comprising multiple channels (305) defined by wall portions (303) protruding from a first surface (309) of the wick structure (307) and extending in an axial direction along a length of the wick structure (307), wherein at least one of the wall portions (303) comprises a tapered termination (304).