Heat Dissipation System with Flow Rate Controller
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Solution Overview
Problem
In immersion cooling systems, excessive dielectric liquid is used under low heat load conditions, leading to inefficiencies in heat transfer and increased costs, as well as installation challenges due to server orientation requirements.
Innovation Solution
A heat dissipation system with a flow rate controller that regulates the amount of working fluid flowing into the casing, allowing for efficient heat absorption via phase change, reducing waste and enabling efficient cooling while accommodating different heat source loads and orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amount of dielectric liquid is determined by high loading heat generation, then the heat source can be effectively cooled under high loading, but excessive dielectric liquid is used under low loading conditions increasing cost and reducing heat transfer efficiency
Solution Approach 1:
The patent introduces a flow rate controller that dynamically adjusts the flow rate of dielectric liquid based on real-time temperature monitoring of the heat source. When the heat source temperature exceeds a threshold, the controller increases dielectric liquid flow; when temperature is normal, it reduces or stops flow. This dynamic adjustment resolves the contradiction by matching dielectric liquid supply to actual cooling needs, preventing waste while ensuring cooling effectiveness.
Solution Approach 2:
The system employs a temperature sensor to continuously monitor the heat source temperature and provides feedback to the flow rate controller. Based on this feedback, the controller adjusts the dielectric liquid flow rate accordingly. This closed-loop feedback mechanism ensures the heat source is effectively cooled when needed while minimizing dielectric liquid consumption when cooling demand is low, thereby resolving the contradiction between cooling reliability and substance loss.
2Productivity
If servers are arranged perpendicular to gravitational direction to prevent bubble movement disturbance, then phase change cooling efficiency is improved, but installation in general cabinets via slide rails becomes difficult requiring special tools
Solution Approach 1:
The patent divides the server into an upper portion and a lower portion that can be independently assembled and disassembled. The upper portion containing the heat source can be installed first in a horizontal orientation, and the lower portion is subsequently attached. This segmentation allows the server to be installed using standard horizontal slide rails while still achieving the required perpendicular arrangement for efficient phase change cooling, thus resolving the contradiction between heat transfer efficiency and installation convenience.
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 system reduces waste and costs by optimizing the flow rate of the working fluid, ensuring efficient heat transfer and allowing for flexible server installation configurations.
Implementation Method 1
the working fluid is configured to drip onto the heat source via the plurality of drip holes... efficiently absorb the heat generated by the heat source via phase change
Implementation Method 2
the dielectric liquid effectively absorbs the heat generated by the heat source and thus evaporates into gas
Implementation Method 3
The first tube is in fluid communication with the second tube via the condenser
Data Source
AI summary
A heat dissipation system and an electronic device. The heat dissipation system configured to circulate working fluid and to cool heat source. Heat dissipation system includes casing, first tube, second tube, condenser and flow rate controller. Partition is fixed in the base and is located in the accommodation space to divide the accommodation space into a first and a second accommodation space. The first accommodation space is located above the second accommodation space along a gravitational direction. The inlet is in fluid communication with the first accommodation space. The outlet is in fluid communication with the second accommodation space. The partition includes a plurality of drip holes. The first and the second accommodation spaces are in fluid communication with each other via the drip holes. The working fluid is configured to drip onto the heat source via the plurality of drip holes.