Cooling Element Adiabatic Zone for Pulsating Heat Pipe Temperature Uniformity
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Solution Overview
Problem
Existing cooling elements with meandering fluid channels and loops experience unstable pressure conditions and uneven temperature distribution due to continuous bubble growth and fluid motion, leading to inefficient heat transfer.
Innovation Solution
Incorporating an adiabatic or cooling zone that separates the evaporator from the loops, preventing additional heat transfer and vapor bubble accumulation, allowing for flexible distribution of heating components and improved temperature uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If loops interconnect the fluid channel sections in a meandering cooling element, then the cooling element can be designed with a compact structure, but vapor bubbles accumulate in the loops causing uneven temperature distribution
Solution Approach 1:
The patent extracts the problematic loops from the cooling element design. By removing the loops that cause vapor bubble accumulation and uneven temperature distribution, the invention achieves uniform temperature distribution while maintaining compact dimensions through alternative straight-channel configurations with optimized geometry.
Solution Approach 2:
Instead of using loops to achieve compactness (conventional approach), the invention inverts the approach by using straight channels with optimized cross-sectional geometry and arrangement to achieve both compactness and uniform temperature distribution, avoiding the bubble accumulation problem inherent in looped designs.
2Volume of moving object
If the fluid channel has a meandering shape with loops, then the cooling element achieves compact design, but unstable pressure conditions occur due to continuous bubble growth
Solution Approach 1:
The invention removes the loops from the meandering channel design that cause unstable pressure conditions. By extracting the problematic curved sections and replacing them with straight channels, the system eliminates the continuous bubble growth and pressure instability while maintaining compact form factor.
Solution Approach 2:
The patent applies different geometric characteristics to different parts of the fluid channel - using straight sections instead of curved loops, and optimizing local cross-sectional properties. This local quality change stabilizes pressure conditions by preventing bubble accumulation in curved sections while maintaining overall compact design.
3Adaptability or versatility
If heating components are distributed over the evaporator area, then flexible design is achieved, but uneven temperature distribution occurs due to vapor bubble accumulation in loops
Solution Approach 1:
By removing the loops that cause preferential flow directions and bubble accumulation, the invention enables uniform heat distribution across the evaporator surface. This allows heating components to be distributed flexibly without the temperature non-uniformity problem that plagued looped designs.
Solution Approach 2:
The patent creates homogeneous flow conditions by eliminating loops and using straight channels with optimized geometry. This homogenizes the temperature distribution across the evaporator, allowing flexible placement of heating components to achieve uniform thermal fields without the directional bias introduced by curved sections.
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
This design enhances cooling efficiency by preventing vapor bubble accumulation and ensuring even temperature distribution across the evaporator, providing improved flexibility and orientation independence for the cooling element.
Implementation Method 1
a fluid channel with a capillary dimension and a meandering shape comprising a plurality of substantially parallel fluid channel sections which are interconnected by loops in a first end and a second end of the cooling element in order to provide a pulsating heat pipe
Implementation Method 2
a fluid channel with a capillary dimension
Implementation Method 3
A first evaporator arranged to receive heat from electric components and for passing the heat into fluid in the fluid channel
Implementation Method 4
A first condenser arranged to cool fluid received from the evaporator via the fluid channel
Implementation Method 5
a cooling zone which separates the first evaporator from the loops in the second end of the cooling element
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a cooling element (11) comprising: a fluid channel (1) providing a pulsating heat pipe, a first evaporator (14) for receiving heat from electric components (15) and for passing the heat into fluid in the fluid channel (1), and a first condenser (18) for receiving fluid from the first evaporator (14) via the fluid channel (1) and for cooling fluid in the fluid channel. In order to obtain an even temperature distribution at the first evaporator (14) an adiabatic zone where the temperature of the fluid in the fluid channel (1) remains unchanged or a cooling zone, with a second condenser (20) cooling fluid in the fluid channel (1), separates the first evaporator (14) from the loops (6) in the second end (12) of the fluid channel.