Bag-Based Passive Liquid Recycling for Immersion Cooling
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Solution Overview
Problem
Conventional two-phase immersion cooling devices face issues with rapid vaporization of coolant leading to excessive pressure, potential structural deformation, and coolant leakage due to limited space and inefficient condensation, posing safety and cost challenges.
Innovation Solution
A passive liquid recycle device that communicates with the immersion cooling device, passively receiving excessive gaseous coolant, allowing it to expand and contract within a housing, and condense back into a liquid state for recycling, thereby maintaining chamber pressure and preventing leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the sealed chamber space is limited to maintain compact device structure, then device size is reduced, but pressure builds up excessively when large amounts of gaseous coolant are generated rapidly
Solution Approach 1:
The system is divided into two functional segments: the sealed chamber for primary cooling operations and the passive liquid recycle device as an auxiliary pressure relief system. This segmentation allows the main chamber to remain compact while the recycle device handles excess pressure externally, resolving the contradiction between compact size and pressure management.
Solution Approach 2:
The passive liquid recycle device acts as an intermediary between the sealed chamber and the external environment. It provides a controlled pathway for excess gaseous coolant to escape and be condensed, preventing direct pressure buildup in the sealed chamber while maintaining system integrity.
2Productivity
If the condensation module capacity is increased to handle rapid vaporization, then coolant recycling efficiency improves, but device complexity and space requirements increase
Solution Approach 1:
The passive liquid recycle device utilizes natural convection and gravity-driven flow to achieve coolant condensation and return without requiring additional active cooling components or complex control systems. The temperature difference between the gaseous coolant and the condensation module automatically drives the condensation process, eliminating the need for external power sources or complex mechanisms.
Solution Approach 2:
The system leverages the phase transition of the coolant from gas to liquid in the condensation module. This natural phase change process enables efficient coolant recovery without requiring complex mechanical compression or active cooling systems, simplifying the overall device architecture while maintaining high productivity.
3Reliability
If pressure relief mechanisms are added to prevent chamber deformation, then structural safety improves, but device complexity and cost increase
Solution Approach 1:
The passive liquid recycle device serves as an intermediary pressure relief mechanism that externally manages excess pressure without compromising the sealed chamber's structural integrity. It provides a controlled outlet for gaseous coolant, preventing uncontrolled deformation while maintaining system simplicity.
Solution Approach 2:
The system design anticipates rapid vaporization events and provides a pre-configured passive recycle pathway that activates automatically when pressure builds up. This beforehand preparation prevents structural damage without requiring complex real-time control systems or additional active components.
4Stress or pressure
If coolant is allowed to escape to relieve pressure, then immediate pressure reduction is achieved, but coolant loss occurs leading to safety and cost issues
Solution Approach 1:
The condensation module utilizes the phase transition from gas to liquid to recover escaped coolant. The gaseous coolant that exits the sealed chamber is automatically condensed back into liquid form, enabling complete coolant recycling and eliminating losses associated with traditional pressure relief methods.
Solution Approach 2:
Instead of permanently discarding escaped coolant through venting, the system recovers it through the passive condensation process. The condensed liquid coolant is returned to the sealed chamber, transforming what would be a loss into a recoverable resource and eliminating both safety and cost concerns.
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
Prevents structural damage, enhances coolant recycling, improves safety, and reduces maintenance and operational costs by passively managing pressure and coolant flow without additional energy or components, ensuring efficient and safe operation.
Implementation Method 1
the gaseous coolant that flowed into the passive liquid recycle device can flow back inside the sealed chamber once condensed back into a liquid state
Implementation Method 2
the liquid coolant around the electronic computing element absorbs heat, boils, and transforms into a gaseous state
Implementation Method 3
The gaseous coolant ascends, and condenses back into a liquid state once coming into contact with the condensation module
Data Source
AI summary
A passive liquid recycle device for solving an issue of inappropriate pressure regulation often occurring in a conventional two-phase immersion cooling device. The passive liquid recycle device is adapted to be in communication with a two-phase immersion cooling device, and includes a housing and at least a bag, accommodated in a volume variable manner in the housing. The bag being higher than the two-phase immersion cooling device and capable of passively receiving a gaseous coolant from the two-phase immersion cooling device and accordingly expanding, and contracting after the gaseous coolant condenses into a liquid coolant and returns to the two-phase immersion cooling device.