Self-Tuning Two-Phase Cooling System for Dynamic Thermal Regulation
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Solution Overview
Problem
High-power computing systems face thermal management challenges due to increasing thermal design power, with traditional cooling methods like air cooling and closed-loop liquid cooling struggling to effectively remove heat from high-power dissipating devices such as CPUs and GPUs, leading to silicon thermal throttling and performance degradation.
Innovation Solution
A self-optimizing, tunable two-phase cooling system that uses a microcontroller-driven compressor and evaporator structures with a two-phase coolant, such as R-1234ze, to dynamically adjust the saturation temperature and pressure, ensuring efficient heat transfer across multiple electronic components like CPUs, GPUs, and DIMMs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional air cooling or closed-loop liquid cooling is used, then the cooling system is simple to implement, but it is unable to effectively remove high heat loads from extended power levels
Solution Approach 1:
The patent employs a two-phase cooling system where the coolant undergoes phase transitions (liquid to vapor and vapor to liquid) to absorb and release heat. The coolant is pumped through evaporators in contact with high-power components, where it absorbs heat and vaporizes, then condenses in heat exchangers to release heat, enabling effective removal of high heat loads up to 1 kW and beyond.
Solution Approach 2:
The system uses a closed-loop hydraulic system with a pump to circulate the two-phase coolant through evaporators and heat exchangers. The pneumatic aspect is incorporated through the use of compressed gas or vapor phase coolant to enhance heat transfer efficiency, allowing the system to handle extended power levels effectively.
2Productivity
If the saturation temperature of the two-phase coolant is increased to improve heat transfer efficiency, then cooling performance improves, but the risk of overheating electronic components increases
Solution Approach 1:
The system incorporates temperature sensors that continuously monitor the temperature of electronic components and the coolant. This feedback is used by a control system to dynamically adjust the saturation temperature of the two-phase coolant, ensuring optimal cooling efficiency while preventing overheating. The control system modulates the coolant flow and phase transition conditions based on real-time temperature data.
Solution Approach 2:
The saturation temperature of the two-phase coolant is made dynamic rather than fixed. The system can adjust the saturation temperature in real-time based on the thermal load and temperature conditions of the electronic components. This dynamic adjustment allows the system to optimize cooling efficiency under varying conditions while maintaining safety margins to prevent overheating.
3Adaptability or versatility
If a fixed saturation temperature system is used, then the system is easier to control, but it cannot adapt to varying thermal loads and ambient conditions
Solution Approach 1:
The control system uses feedback from temperature sensors to continuously monitor the thermal state of the system. Based on this feedback, the system automatically adjusts the saturation temperature of the two-phase coolant to match the varying thermal loads and ambient conditions, enabling high adaptability without requiring complex manual intervention.
Solution Approach 2:
The system is designed to self-regulate the saturation temperature of the coolant based on the thermal conditions detected by sensors. The control system automatically manages the phase transition conditions and coolant flow rates, allowing the system to adapt to varying loads without requiring external control or complex user intervention.
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 provides seamless and homogenous cooling, maintaining optimal operating temperatures, increasing cooling efficiency, and reducing energy consumption while being eco-friendly, capable of handling thermal loads up to 1 kW or more, thus enhancing performance and reducing environmental impact.
Implementation Method 1
a two-phase coolant having a saturation temperature and a closed loop for the two-phase coolant
Implementation Method 2
evaporator structures configured to be thermally coupled to the plurality of electronic components
Implementation Method 3
a compressor fluidly connected between an outlet of the plurality of evaporator structures and an inlet of the heat exchanger
Implementation Method 4
a heat exchanger configured to transfer heat from the two-phase coolant to an outside environment
Data Source
AI summary
An apparatus and method for cooling a computing system, comprising a plurality of electronic components, with a cooling system. The cooling system includes a closed loop for the two-phase coolant, wherein the two-phase coolant has a saturation temperature. The closed loop includes a valve fluidly connected between an outlet of a heat exchanger and an inlet of a plurality of evaporator structures configured to be thermally coupled to the plurality of electronic components, and a compressor fluidly connected between an outlet of the plurality of evaporator structures and an inlet of the heat exchanger. The apparatus and method for the cooling system are configured to monitor one or more system temperatures of the computing system and adjust an operation of at least one of the valve or the compressor to alter the saturation temperature based on the one or more system temperatures.