Server Immersion Cooling Pressure Control Device
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Solution Overview
Problem
Current two-phase immersion cooling systems for servers face challenges in preventing condensed water from contacting electronic components, leading to potential damage, and require excessive dielectric fluid, increasing costs and system size due to the placement of molecular sieves within the tank.
Innovation Solution
A cooling system with a pressure control device comprising a condenser, dehumidifier, gas storage chamber, and valve, along with a controller and barometer, which manages air pressure and humidity to prevent liquid water formation and reduce dielectric fluid usage by maintaining a dry environment and controlling air pressure within predetermined limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If molecular sieve is placed inside the liquid tank to absorb condensed water, then the protection of electronic components from liquid water is improved, but the system size and dielectric fluid usage increase
Solution Approach 1:
The molecular sieve dehumidifier is extracted from inside the liquid tank and placed outside, connected via pipelines. This removes the volume occupation from the tank interior, reducing system size while maintaining the dehumidification function through external placement and fluid connection.
Solution Approach 2:
Dielectric fluid serves as an intermediary medium, circulating between the liquid tank and external molecular sieve dehumidifier. The fluid carries moisture from the tank to the dehumidifier, enabling water removal without direct physical contact between molecular sieve and electronic components, thus reducing tank volume requirements.
2Reliability
If molecular sieve is placed inside the liquid tank, then condensed water absorption is improved, but dielectric fluid usage increases due to fluid between sieve particles
Solution Approach 1:
The molecular sieve is extracted from the liquid tank environment, eliminating the need for dielectric fluid to fill spaces between sieve particles. The dehumidifier operates with minimal dielectric fluid in the connecting pipelines, significantly reducing overall dielectric fluid consumption while maintaining water absorption capability.
3Stress or pressure
If pressure control device exhausts or absorbs gas to control pressure, then pressure regulation is improved, but additional moisture is introduced through fresh air intake
Solution Approach 1:
The system uses pressure differential as a control parameter to regulate the opening and closing of the water removal valve. When pressure difference exceeds a threshold, the valve opens to release moisture-laden gas; when pressure equalizes, the valve closes. This pressure-based control prevents moisture introduction while maintaining effective pressure regulation.
Solution Approach 2:
The pressure control mechanism incorporates feedback through pressure sensors that monitor the sealed space pressure and automatically adjust the water removal valve operation. This closed-loop control ensures pressure stability while minimizing unnecessary air intake that would introduce moisture, optimizing both pressure regulation and moisture prevention.
4Temperature
If condenser is used to condense water vapor, then heat dissipation is improved, but liquid water generation increases system load
Solution Approach 1:
The condenser converts water vapor (which would otherwise be harmful moisture) into liquid water that can be easily collected and removed by the molecular sieve system. The condensation process, while generating liquid water, actually benefits the system by concentrating moisture for efficient removal, reducing overall humidity control load and preventing electronic component damage.
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
Effectively prevents liquid water from contacting electronic components, reduces dielectric fluid usage and system size, and maintains optimal air pressure, thereby enhancing the efficiency and cost-effectiveness of the cooling system.
Implementation Method 1
The molecular sieve in the multi-hole case body can absorb the liquid water condensed in the liquid tank
Implementation Method 2
the water vapor in the air in the immersion cooling system will condense to form condensed water
Data Source
AI summary
A cooling system of server includes a tank and a pressure control device. The tank is configured to accommodate a dielectric fluid. The pressure control device is configured to regulate the pressure of the tank. The pressure control device includes a condenser, a dehumidifier, a gas storage chamber, and a valve. The condenser is connected to the tank. The dehumidifier is connected to the condenser. The gas storage chamber is connected to the dehumidifier. The valve is connected between the dehumidifier and the gas storage chamber. The valve is configured to communicate and not to communicate the dehumidifier and the gas storage chamber.