Hydrofire Rod Heating for Stable Two-Phase Immersion Cooling Startup
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Solution Overview
Problem
Traditional computing systems face inefficiencies in cooling and space utilization due to the use of air cooling, while liquid cooling systems often require constant fluid replenishment and are prone to contamination, leading to performance issues and potential damage to components.
Innovation Solution
A pressure-controlled vessel system utilizing dielectric fluid for immersion cooling, which maintains a vacuum to reduce boiling point, incorporates condensing structures for vapor management, and uses a robust fluid management system to conserve and purify the dielectric fluid, ensuring efficient and continuous cooling without exposing components to gaseous phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional air cooling is used, then system simplicity is maintained, but cooling efficiency is insufficient and space utilization is reduced
Solution Approach 1:
The patent employs liquid immersion cooling where computer components are directly submerged in dielectric fluid, replacing traditional air cooling mechanisms. This hydraulic approach enables highly efficient heat transfer from components to the liquid medium, dramatically improving cooling efficiency while reducing the space required for cooling infrastructure.
Solution Approach 2:
The system utilizes two-phase immersion cooling where the dielectric fluid undergoes phase transition from liquid to vapor and back to liquid. The components are cooled by the liquid phase, which absorbs heat and evaporates to vapor phase, then condenses back to liquid in a closed cycle. This phase change mechanism provides superior cooling efficiency compared to single-phase liquid cooling or air cooling.
2Productivity
If liquid cooling systems are used, then cooling efficiency is improved, but fluid replenishment is required and contamination risks increase
Solution Approach 1:
The patent employs a closed-loop immersion cooling system where dielectric fluid circulates in a sealed environment. This closed system prevents external contamination of the cooling fluid and eliminates the need for continuous fluid replenishment. The dielectric fluid serves both as a cooling medium and as an protective atmosphere around the electronic components.
Solution Approach 2:
The system incorporates self-contained fluid management where the dielectric fluid is recirculated and reused within the closed loop. The system maintains its own cooling fluid without requiring external intervention for replenishment, and the dielectric properties of the fluid provide inherent protection against electrical shorts and contamination.
3Temperature
If vacuum pressure is applied, then dielectric fluid vaporization temperature is reduced, but system complexity increases
Solution Approach 1:
The patent utilizes pressure management to control the physical parameters of the dielectric fluid. By maintaining a vacuum or reduced pressure environment, the system lowers the vaporization temperature of the dielectric fluid, enabling two-phase cooling to occur at lower temperatures suitable for electronic components. The pressure is dynamically adjusted to optimize the phase transition temperature.
4Productivity
If component density is increased, then space utilization is improved, but heat generation increases requiring more cooling
Solution Approach 1:
The immersion cooling system allows for direct liquid-to-component heat transfer, enabling much higher heat flux densities compared to air cooling. This efficient heat removal capability permits significantly higher component density within the same volume, as the dielectric fluid can absorb and remove the increased heat generation from densely packed components.
Solution Approach 2:
The two-phase immersion cooling system leverages the high latent heat of vaporization of the dielectric fluid to remove large amounts of heat from densely packed components. As the fluid evaporates from the component surfaces, it absorbs substantial heat energy, enabling the system to handle the thermal load from high-density component arrangements effectively.
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 achieves enhanced cooling efficiency, reduced energy consumption, and increased component density by maintaining stable temperatures and minimizing fluid loss, while preventing contamination and damage to components.
Implementation Method 1
computer components and other electronics may be submerged in a dielectric or electrically non-conductive liquid in order to draw heat directly from the component into the liquid
Implementation Method 2
a condensing system in order to cool and convert gaseous dielectric fluid to liquid dielectric fluid
Implementation Method 3
The disclosed pressure management system allows the disclosed embodiment to operate under a vacuum, thereby reducing the temperature at which dielectric fluid vaporizes
Data Source
AI summary
A two-phase liquid immersion cooling system is described in which heat generating computer components cause a dielectric fluid in its liquid phase to vaporize. The dielectric vapor is then condensed back into a liquid phase and used to cool the computer components. Heating elements are used to maintain a minimum temperature of a dielectric immersion fluid within a two phase liquid immersion cooled computing system. The added heat from heating elements may facilitate startup by minimizing the amount of vapor load/pressure when starting up the unit and bringing one or more servers on line.