Phase-Change Liquid Cooling with Jet Impingement and Cavitation Isolation
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Solution Overview
Problem
Existing phase-change working media in phase-change immersion cooling systems have low critical heat flux and are prone to local liquid shortages, limiting their heat dissipation capability due to passive heat dissipation and vulnerability to cavitation.
Innovation Solution
A computing device with separate accommodation cavities for different temperature coolants, utilizing a power component to jet high-speed coolant to heating elements, while avoiding cavitation through a partitioned design and liquid level detection systems to maintain optimal coolant levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a phase-change working medium is contained in a container with passive heat dissipation, then the system structure is simple, but the critical heat flux is low and local liquid shortage occurs easily
Solution Approach 1:
The patent transforms the passive heat dissipation system into an active jet cooling system. The power component drives the phase-change working medium to form high-speed jets that dynamically impinge on the heating element surface, enabling active control of heat transfer processes and significantly improving critical heat flux
Solution Approach 2:
The patent divides the single containment space into two separate cavities: a first accommodation cavity for the power component and a second accommodation cavity for the heating element. This segmentation allows independent optimization of each component's environment and facilitates the jet cooling mechanism
2Device complexity
If the power component is placed in the same coolant as the heating element, then the system structure is simple, but cavitation damages the power component
Solution Approach 1:
The patent physically separates the power component and heating element into different accommodation cavities. The first cavity houses the power component in a relatively stable environment, while the second cavity contains the heating element subjected to jet cooling and phase-change processes, preventing cavitation damage to the power component
Solution Approach 2:
The patent extracts the power component from the harsh environment of the second cavity where phase-change and jet impingement occur. By placing it in the first cavity with its own coolant, the power component is protected from cavitation while still being able to drive the jet cooling system
3Device complexity
If a single coolant is used for both power component and heating element, then the coolant system is simple, but heat dissipation efficiency is limited
Solution Approach 1:
The patent implements separate coolant systems for the first and second accommodation cavities. Each cavity can use optimally suited coolants with different thermal properties, allowing independent optimization of heat dissipation efficiency for each component without compromising the other
Solution Approach 2:
The patent allows different regions (cavities) to have different coolant properties tailored to their specific thermal requirements. The first coolant is optimized for the power component's thermal characteristics, while the second coolant is optimized for the heating element's jet cooling requirements
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
Enhances critical heat flux and ensures reliable, efficient heat dissipation by creating a supercooling environment, reducing cavitation impact, and optimizing coolant distribution.
Implementation Method 1
the phase-change working medium may boil under a normal pressure and near a normal temperature, and can cool the heating element by absorbing heat through evaporation
Implementation Method 2
phase-change immersion cooling technology
Implementation Method 3
A power component is disposed in the first accommodation cavity, is connected to the jet component, and is configured to pump the first coolant into the jet component for jetting to the heating element through the jet component
Data Source
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AI summary
This application provides a computing device based on a phase-change liquid cooling technology, including a body, a jet component, and a power component. The body is divided into a first accommodation cavity and a second accommodation cavity through a partition plate. The first accommodation cavity is configured to accommodate a first coolant, the second accommodation cavity is configured to accommodate a heating element and a second coolant, and a temperature of the second coolant is higher than a temperature of the first coolant. The body is provided with a liquid refill opening communicating with the first accommodation cavity and an exhaust vent communicating with the second accommodation cavity. The power component is connected to the jet component, and is configured to pump the first coolant to the heating element through the jet component. In this application, a critical heat flux can be improved, and efficient jet cooling can be performed on the heating element with a high heat flux. In addition, the first accommodation cavity and the second accommodation cavity that are separated through the partition plate can respectively accommodate working media with different temperatures, to create an appropriate supercooling environment, avoid impact of cavitation on the power component, and ensure reliability and availability of the power component.