3D Pulsating Heat Pipe with Integrated Chamber
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Solution Overview
Problem
Conventional pulsating heat pipes face challenges in manufacturing due to curvature radius limitations, leading to reduced heat transfer per unit area and increased manufacturing costs, which are exacerbated by the need for specific bending fixtures and adverse effects on heat dissipation capacity for high-power electronic devices.
Innovation Solution
A three-dimensional pulsating heat pipe design incorporating a heat exchange chamber integrated with a three-dimensional pipe coil structure, allowing for increased working fluid heating and enhanced heat transfer capacity per unit area without the need for specific bending fixtures, thus improving manufacturing ease and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the curvature radius of the bent section of the pipes is reduced to increase heat transfer area, then the heat transfer per unit area is improved, but the bent pipes become vulnerable to excessive deformations or raptures and manufacturing difficulty increases
Solution Approach 1:
The heat pipe is divided into multiple straight pipe sections connected by expansion joints, avoiding the need for large-scale bending operations. Each section can be manufactured separately with standard curvature radii, then assembled to form the complete heat transfer structure, resolving the contradiction between achieving sufficient heat transfer area and maintaining manufacturability.
Solution Approach 2:
The patent transitions from a two-dimensional planar pipe layout to a three-dimensional folded structure. By arranging pipe sections in multiple spatial dimensions (upward, downward, lateral directions), the heat transfer area is significantly increased without requiring excessive bending curvature in any single direction, thus avoiding deformation issues while achieving high heat transfer capacity.
2Reliability
If preset spacing between pipes is introduced to avoid excessive deformation, then pipe reliability is improved, but heat transfer across the pipes is adversely influenced and heat transfer per unit projection area is reduced
Solution Approach 1:
Multiple pipe sections are merged and connected through expansion joints to form an integrated heat transfer system. The pipes are arranged in close proximity in three-dimensional space, maximizing the heat transfer surface area per unit projection area while maintaining structural integrity. This merging approach eliminates the need for large spacing while preserving pipe reliability.
Solution Approach 2:
The pipe sections are designed with appropriate curvature radii that balance flexibility and structural integrity. By optimizing the curvature parameters of each pipe section, the system achieves sufficient heat transfer area without creating excessive deformation risks, allowing pipes to be positioned closer together while maintaining reliability.
3Ease of manufacture
If conventional serpentine piping structure is used, then manufacturing process is simplified, but heat dissipation capacity per unit area is insufficient for high-power electronic devices
Solution Approach 1:
The patent employs a three-dimensional folded pipe structure instead of a conventional two-dimensional serpentine layout. Pipe sections are arranged in multiple spatial directions (upward, downward, lateral), creating a compact high-density heat transfer structure. This dimensional transformation enables significantly increased heat dissipation capacity per unit area while maintaining manufacturing simplicity through standardized pipe sections and connection methods.
Solution Approach 2:
The heat dissipation system is segmented into multiple pipe sections that can be independently manufactured and then assembled. Each section uses standard pipe materials and connection techniques, keeping the manufacturing process simple. The segmented structure allows for optimized heat transfer pathways in three dimensions, achieving high heat dissipation capacity without complicating the manufacturing process.
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 integration of a heat exchange chamber with the three-dimensional pipe coil structure significantly increases heat transfer and heat exchange capacity per unit area, as demonstrated by increased evaporation area and heat flux, while reducing heat resistance and manufacturing complexity.
Implementation Method 1
the heat section of the three dimensional circular pipe structure is contacted with the heat exchange chamber, and the heat exchange chamber is further connected with the opposing ends of the metal pipes forming the three dimensional pipe coil structure
Implementation Method 2
the liquid membranes of the liquid plungers or vapor plungers on the pipe wall would be heated and evaporated so as to expand the corresponding vapor plungers
Implementation Method 3
the vapors of the working liquid would be condensed, and thus the corresponding volume would be significantly shrunk
Implementation Method 4
Since the dimensions and distributions of the vapor or liquid plungers in the heat pipe are random, thus pressure differences would be generated in the heat pipe. Thereupon, remarkable pulsating motions of the working fluid inside the heat pipe would be induced
Implementation Method 5
In the condensation section, the vapors of the working liquid would be condensed, and thus the corresponding volume would be significantly shrunk
Implementation Method 6
The working fluid in the pulsating heat pipe is naturally formed by surface tensions into sectional liquid plungers, separated by air or vapor plungers
Data Source
AI summary
A three dimensional pulsating heat pipe includes a three dimensional pipe coil structure and a heat exchange chamber. The three dimensional pipe coil structure is formed by winding at least one metal pipe to surround repeatedly a central axis and stack by extending along the central axis. Two opposite sides of the three dimensional pipe coil structure are arranged as a heating section and a condensation section, respectively. The heat exchange chamber is disposed at the heating section. Two opposite ends of the at least one metal pipe are connected with an interior of the heat exchange chamber.