Two-phase immersion cooling system and heat conduction device thereof
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Solution Overview
Problem
Existing immersion cooling systems face challenges in effectively cooling components that are partially or fully submerged in a vapor phase, as direct contact with liquid-phase working fluid is not always feasible, leading to inefficient heat dissipation and potential performance degradation.
Innovation Solution
A heat conduction device with a heat conduction element and boiling-assisting structure is introduced, where the first section is immersed in the liquid-phase section to facilitate heat exchange with a liquid-phase working fluid, while the second section connects to the component to be cooled, allowing for efficient heat transfer and boiling-assisted cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If components are immersed in liquid-phase working fluid for effective cooling, then heat dissipation efficiency is improved, but direct liquid contact may cause corrosion or electrical short circuiting
Solution Approach 1:
The system divides the working fluid into two distinct phases: liquid-phase for heat absorption and vapor-phase for component immersion. The heat conduction element acts as an interface between these phases, allowing heat transfer without direct liquid contact with electronic components.
Solution Approach 2:
The heat conduction element serves as an intermediary between the liquid-phase working fluid and the component to be cooled. It conducts heat from the component through its structure to the liquid-phase fluid, enabling indirect cooling while maintaining component reliability.
2Reliability
If components are placed in vapor phase to avoid liquid contact, then component reliability is maintained, but heat dissipation efficiency deteriorates
Solution Approach 1:
The system utilizes phase change dynamics between liquid and vapor phases of the working fluid. The liquid-phase section absorbs heat through conduction and convection, while the vapor-phase section provides thermal insulation and protects components from liquid contact, optimizing both reliability and heat dissipation.
Solution Approach 2:
The working fluid undergoes phase transitions between liquid and vapor states to facilitate heat transfer. Liquid-phase fluid absorbs heat from the heat conduction element, vaporizes, and then condenses back to liquid in a continuous cycle, enabling efficient heat dissipation without direct liquid contact with components.
3Temperature
If heat conduction element extends into liquid-phase section for heat exchange, then heat transfer efficiency is improved, but device complexity increases
Solution Approach 1:
The heat conduction element performs multiple functions simultaneously: it serves as a thermal conductor from the component to the liquid-phase fluid, acts as a structural support for the component in the vapor phase, and provides a surface for boiling-assisted heat transfer. This multi-functionality reduces the need for additional separate components.
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 enables rapid and effective heat dissipation from components in the vapor phase by leveraging boiling-assisted heat transfer, maintaining component performance and extending its service life without direct liquid contact.
Implementation Method 1
The heat conduction element has a first section and a second section, wherein the first section is in the liquid-phase section, and the second section is connected to the at least one portion of the device to be cooled
Implementation Method 2
The boiling-assisting structure is on the first section
Implementation Method 3
The work tank has a vapor section and a liquid-phase section. The liquid-phase section is adapted to contain a liquid-phase working fluid
Implementation Method 4
The heat conduction element is adapted to contain a heat conduction fluid
Data Source
AI summary
A two-phase immersion cooling system includes a work tank, a device to be cooled, and a heat conduction device. The work tank has a vapor section and a liquid-phase section to contain a liquid-phase working fluid. At least one portion of the device to be cooled is in the vapor section. The heat conduction device including a heat conduction element and a boiling-assisting structure has a closed space to contain a heat conduction fluid to have the heat conduction fluid flow inside the closed space. The heat conduction element has a first section in the liquid-phase section and a second section connected to the at least one portion of the device to be cooled. The boiling-assisting structure is connected to the first section and exposed to the liquid-phase section of the work tank, thereby causing bubble nucleation at a heterogeneous interface between the boiling-assisting structure and the liquid-phase working fluid.