Panel-Integrated Liquid Cooling for High-Heat Computer Housings
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Solution Overview
Problem
Current cooling systems for computer components, such as those in server farms and AI GPUs, struggle to effectively manage increasing heat loads, particularly in rack-mounted housings, necessitating improved cooling capacity.
Innovation Solution
A rack-mountable computer system with housing panels incorporating coolant channels, utilizing a primary coolant in direct contact with heat-generating components and a secondary coolant circulating through these channels, which is then cooled by a third coolant in an external heat exchanger, enhancing cooling efficiency without requiring fans or pumps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air cooling or traditional immersion cooling is used, then the system structure is simple, but the cooling capacity is insufficient for high heat loads
Solution Approach 1:
The cooling system is divided into multiple independent coolant loops: a first coolant loop for direct-to-chip cooling of high-heat components, a second coolant loop for cooling intermediate heat exchangers, and a third coolant loop (building chilled water) for final heat rejection. This segmentation allows each loop to be optimized for its specific function while collectively providing high cooling capacity without excessive overall complexity.
Solution Approach 2:
Intermediate heat exchangers serve as mediators between the first coolant loop (directly contacting components) and the second coolant loop (circulating through panels). This intermediary approach allows efficient heat transfer from high-heat components to the panel cooling system without direct mixing of coolants, enabling scalable cooling capacity while maintaining system manageability.
2Power
If coolant channels are added to panel walls, then cooling capacity is improved, but manufacturing complexity increases
Solution Approach 1:
The panels serve multiple functions: they provide structural support for the rack-mounted housing, act as heat exchangers through embedded coolant channels, and serve as mounting surfaces for computer components. By making the panels multi-functional, the cooling capability is added without requiring separate dedicated cooling structures, thereby limiting the increase in manufacturing complexity.
Solution Approach 2:
The coolant channels are nested within the panel walls, with the cooling function embedded inside the structural panels. This nesting approach allows the cooling system to be integrated into existing panel designs without adding external complexity, as the channels are contained within the panel thickness rather than requiring additional external components.
3Productivity
If multiple coolant loops are used, then cooling efficiency is enhanced, but system complexity increases
Solution Approach 1:
Multiple coolant loops are merged into a single integrated cooling system where the loops are thermally coupled through heat exchangers. The first, second, and third coolant loops operate semi-independently but are combined into one cohesive system managed by a single controller, achieving high cooling efficiency without proportionally increasing operational complexity.
Solution Approach 2:
The system uses natural convection and density-driven flow to circulate coolants through the channels, reducing or eliminating the need for mechanical pumps. The temperature differences between coolants automatically drive the flow through the heat exchangers, allowing the system to self-regulate and reducing the complexity of active control mechanisms.
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 enhanced cooling capacity by leveraging multiple coolant loops and natural convection, effectively managing heat loads and maintaining component temperatures within acceptable ranges.
Implementation Method 1
A first coolant is disposed within the housing, in direct contact with heat-generating computer components
Implementation Method 2
A second coolant is circulated through the channels, removing heat from the first coolant
Implementation Method 3
The second coolant is passed to a heat exchanger, and is cooled by a third coolant (building chilled water, for example)
Data Source
AI summary
Systems for cooling computer systems in housings. The housing are made up of several panels making up the housing and thee panels have coolant channels within the panel walls. A first coolant is disposed within the housing, in direct contact with heat generating computer components. A second coolant is circulated through the channels, removing heat form the first coolant. The second coolant is passed to a heat exchanger, and is cooled by a third coolant (building chilled water, for example).