Immersion Cooling Buffer Tanks for Condenser Failure Mitigation
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Solution Overview
Problem
Conventional immersion cooling systems face challenges in maintaining effective cooling capacity and preventing over-pressurization due to condenser failures, which can lead to elevated temperatures and potential damage to heat-generating components.
Innovation Solution
The system incorporates a vapor buffer tank and a liquid buffer tank, connected via conduits and valves, to manage pressure and fluid levels, allowing safe venting of excess vapor and supplemental liquid supply to maintain cooling even in the event of condenser failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a condenser is used to condense vapor in an immersion cooling system, then cooling performance is improved, but system reliability deteriorates when condenser failure occurs
Solution Approach 1:
The patent introduces buffer tanks that are pre-filled with liquid working fluid and positioned to automatically supply liquid when vaporization exceeds condensation capacity. This preliminary preparation ensures that when the condenser fails or is overwhelmed, the system can immediately compensate by drawing from the buffer tank, preventing temperature runaway without requiring active control or rapid response mechanisms.
Solution Approach 2:
The buffer tank acts as a cushioning mechanism that absorbs the excess vaporization capacity before it can cause system failure. By having additional liquid working fluid stored in the buffer tank at the same pressure level as the immersion chamber, the system is cushioned against the harmful effects of condenser failure, allowing temporary vapor accumulation without compromising component safety.
2Productivity
If liquid working fluid is used for immersion cooling, then cooling efficiency is improved, but system complexity increases due to need for vapor and liquid management
Solution Approach 1:
The buffer tank serves as an intermediary element between the immersion chamber and the external environment. It mediates the interaction by providing a reservoir that automatically balances liquid supply and vapor removal, eliminating the need for complex active control systems, pumps, or sensors while maintaining efficient two-phase cooling operation.
Solution Approach 2:
The system is designed to self-regulate through passive mechanisms where the buffer tank automatically supplies liquid when vaporization exceeds condensation capacity and vents vapor when liquid level rises. This self-service approach eliminates the need for external control systems, reducing complexity while maintaining high cooling efficiency through natural phase change processes.
3Stress or pressure
If vapor is vented from the immersion chamber, then pressure control is improved, but loss of working fluid occurs
Solution Approach 1:
The system discards excess vapor temporarily by venting it to the buffer tank, then recovers it through condensation and return to the immersion chamber. The buffer tank captures vapor that would otherwise be lost, allowing the system to maintain pressure control while recovering working fluid through the condensation process and circular flow path.
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
Ensures continuous cooling by safely venting vapor and replenishing liquid, preventing overheating and maintaining stable operating conditions in the immersion chamber, thereby protecting heat-generating components.
Implementation Method 1
The liquid working fluid absorbs heat from the heat-generating components
Implementation Method 2
The liquid working fluid absorbs heat from the heat-generating components
Implementation Method 3
The working fluid vaporizes, introducing vapor into the liquid of the working fluid
Implementation Method 4
The liquid working fluid absorbs heat from the heat-generating components
Implementation Method 5
The condenser cools the vapor working fluid in the immersion chamber using a circulating cooling fluid
Implementation Method 6
The condenser cools the vapor working fluid in the immersion chamber using a circulating cooling fluid
Implementation Method 7
Because the vapor working fluid rises in the liquid working fluid
Data Source
AI summary
A thermal management system for cooling electronic devices includes an immersion cooling system, a vapor buffer tank, and a liquid buffer tank. The immersion cooling system includes an immersion tank defining an immersion chamber, a working fluid in the immersion chamber, and a condenser. A liquid portion of the working fluid defines an immersion bath in the immersion chamber and a vapor portion defines a headspace above the immersion bath in the immersion chamber. The condenser condenses the vapor portion of the working fluid to the liquid portion of the working fluid. The vapor buffer tank is in fluid communication with the headspace, and a vapor valve selectively allows fluid communication between the vapor buffer tank and the headspace. The liquid buffer tank is in fluid communication with the immersion chamber, and a liquid valve selectively allows fluid communication between the liquid buffer tank and the immersion chamber.