Coolant Leak Mitigation Using Collection Tank and Pressure Reduction
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Solution Overview
Problem
Existing cooling systems for high-density server environments face challenges in effectively mitigating liquid coolant leaks, leading to potential damage and increased complexity, energy consumption, and equipment costs due to the need for continuous vacuum pumping and complex control systems.
Innovation Solution
A leak mitigation system comprising a collection tank, first and second valve units, an LM pump, and a controller that transfers coolant to the collection tank upon leak detection, reducing pressure and preventing further leakage, and optionally shutting down the coolant circulation pump and isolating the expansion tank to enhance leak mitigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous vacuum pumping is used to mitigate coolant leaks, then leak prevention is improved, but energy consumption increases
Solution Approach 1:
The patent employs periodic action by using a vacuum pump only when leak conditions are detected, rather than continuous operation. The controller activates the vacuum pump in response to leak signals from sensors, maintaining reliability while significantly reducing energy consumption during normal operation.
Solution Approach 2:
The system implements self-service through automatic leak detection and response. Sensors continuously monitor for leaks and automatically trigger the vacuum pump and valve mechanisms without human intervention, maintaining system reliability while minimizing energy usage by activating components only when needed.
2Reliability
If complex control systems are implemented for leak mitigation, then leak prevention is improved, but device complexity increases
Solution Approach 1:
The control system is segmented into modular components: leak sensors positioned at specific locations, individual valve units for different cooling loop sections, and a centralized controller. This segmentation allows for targeted leak response and simplifies the overall control architecture by dividing functions into independent, manageable units.
Solution Approach 2:
The patent introduces an intermediary vacuum pump system that mediates between the leak detection sensors and the cooling loop. When a leak is detected, the vacuum pump acts as an intermediary to remove leaked coolant before it causes damage, simplifying the control logic by using a single response mechanism rather than complex multi-step procedures.
3Temperature
If coolant is continuously circulated to maintain cooling, then cooling effectiveness is improved, but energy consumption increases during leak conditions
Solution Approach 1:
The coolant circulation system operates dynamically with variable speed circulation pumps that adjust flow rates based on system conditions. During leak events, the controller modulates pump speed to maintain adequate cooling while reducing energy consumption compared to full-speed continuous operation.
Solution Approach 2:
The circulation pump operation is adjusted periodically or conditionally based on leak detection. When leaks are detected, the controller may reduce or temporarily suspend circulation in affected zones while maintaining circulation in unaffected areas, reducing overall energy consumption while preserving cooling effectiveness where needed.
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 efficiently reduces coolant leakage by transferring coolant to a collection tank using an LM pump, minimizing energy consumption and complexity compared to traditional approaches, and maintaining the cooling loop at a simpler design without constant vacuum requirements.
Implementation Method 1
transferred at least a portion of the coolant to the collection tank from the cooling loop, reducing pressure in the cooling loop, and preventing further leakage
Implementation Method 2
the cooling fluid may be a liquid, such as water or oil, which may be brought into thermal contact with the electronic component(s) via one or more cooling blocks or piping
Implementation Method 3
the cooling fluid may be a gas, such as air, and may directly contact the electronic component(s) to transfer the heat away from the electronic component(s)
Data Source
AI summary
Example implementations relate to a leak mitigation (LM) system. The LM system may include a collection tank, a first valve unit coupled to the collection tank, a second valve unit coupled to a cooling loop carrying a coolant, and an LM pump coupled between the first valve unit and the second valve unit. Moreover, the leak mitigation system may also include a controller operatively coupled to the first valve unit, the second valve unit, and the LM pump to operate, in an event of a leak of the coolant from the cooling loop, the first valve unit, the second valve unit, and the LM pump to transfer at least a portion of the coolant to the collection tank from the cooling loop via the second valve unit and the first valve unit.