Boiling Cooler Surface Structure for Higher Heat Flux Boiling
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Solution Overview
Problem
Current boiling coolers with finned boilers face limitations in enhancing boiling heat transfer performance, necessitating a more effective design for improved thermal efficiency.
Innovation Solution
The method involves forming a boiler with a boiling surface featuring a series of protrusions aligned in specific shapes whose widths gradually increase from base to end, created using additive manufacturing techniques like powder bed fusion, to enhance heat transfer during the boiling process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional finned boilers are used in boiling coolers, then the structure is simple and easy to manufacture, but the boiling heat transfer performance reaches its limit and cannot be further improved
Solution Approach 1:
The patent applies local quality by creating protrusions with specific geometric features (gradually increasing width from base to end) at specific locations on the boiling surface. This localized structural modification enhances heat transfer performance in critical areas without requiring complete redesign of the entire boiler structure, thus improving reliability while controlling complexity.
Solution Approach 2:
The patent utilizes curvature by designing protrusions with gradually increasing width from base to end, creating curved surfaces that enhance boiling heat transfer. The curved geometry of the protrusions promotes better refrigerant contact and heat transfer efficiency compared to flat conventional surfaces, resolving the contradiction between performance and complexity.
2Reliability
If the boiling surface is made flat and simple, then manufacturing is easy, but drying issues occur and heat transfer performance is limited
Solution Approach 1:
The patent applies parameter changes by modifying the geometric parameters of the boiling surface through additive manufacturing. The protrusions have specific dimensional parameters (width increasing from base to end) that are optimized for heat transfer performance. This allows precise control of surface characteristics to prevent drying while maintaining manufacturing feasibility through modern additive processes.
Solution Approach 2:
The patent replaces conventional mechanical manufacturing methods with additive manufacturing technology. This substitution enables the creation of complex protrusion geometries that would be difficult or impossible to achieve with traditional machining, thereby improving heat transfer performance without proportionally increasing manufacturing difficulty.
3Reliability
If protrusions with uniform width are used, then manufacturing is simpler, but boiling heat transfer performance is not optimized
Solution Approach 1:
The patent employs curvature by designing protrusions with gradually increasing width from base to end, creating a non-uniform geometric profile. This curved geometry optimizes boiling heat transfer performance by enhancing refrigerant contact and bubble dynamics. The specific curved shape is precisely controlled through additive manufacturing parameters, balancing performance optimization with manufacturing capability.
Solution Approach 2:
The patent utilizes parameter changes by varying the width parameter of protrusions along their length (from base to end). This gradual parameter variation optimizes heat transfer performance by creating ideal bubble nucleation and growth conditions. The precise control of this geometric parameter is achieved through additive manufacturing technology.
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 configuration significantly improves boiling heat transfer performance by accelerating boiling and maintaining refrigerant supply, preventing drying issues and enhancing thermal efficiency across various heat flux ranges.
Implementation Method 1
a boiler for boiling a refrigerant and a condenser for condensing the refrigerant
Implementation Method 2
transferring heat from a heat source
Implementation Method 3
a condenser for condensing the vaporized refrigerant and returning the condensed refrigerant to the boiler
Data Source
AI summary
A boiling-cooler production method according to the present invention is a method for producing a boiling cooler including a boiler for vaporizing a refrigerant by transferring heat from a heat source and a condenser for condensing the vaporized refrigerant and returning the condensed refrigerant to the boiler, the method including forming the condenser; and forming the boiler. The forming the boiler includes forming a boiling surface portion on a surface that is opposite to a mounting surface onto which the heat source is mounted, and is in contact with the refrigerant. The forming the boiling surface portion includes forming a plurality of protrusions that are aligned to each other and whose widths gradually increase from bases to ends of the protrusions.