Server Rack Bracket Thermal Conduction for Hotspot Cooling
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Solution Overview
Problem
In data centers, inadequate cooling of electronic devices on server racks can lead to overheating and device failure due to insufficient airflow, especially in areas where forced convection is not effective, resulting in significant costs and efficiency losses.
Innovation Solution
A server rack sub-assembly design that includes heat-generating electronic devices mounted on a motherboard with thermally decoupled areas, using brackets with heat transfer surfaces and a heat transfer device to conductively and convectively transfer heat away from hard-to-cool areas to regions with cooling airflow, combining conductive and convective cooling techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If forced convection cooling is used over electronic devices, then cooling efficiency is improved, but devices in difficult-to-cool areas still overheat
Solution Approach 1:
The patent introduces brackets as intermediary heat transfer components positioned between the electronic devices and the cooling airflow. These brackets serve as thermal conduits that capture heat from devices in difficult-to-cool areas and transfer it to regions where cooling airflow is effective, thereby resolving the contradiction between overall cooling efficiency and localized device protection.
Solution Approach 2:
The patent extends the cooling solution from a two-dimensional surface cooling approach to a three-dimensional thermal management system. By positioning brackets at multiple locations around the motherboard perimeter and using heat pipes to conduct heat vertically and horizontally, the system creates additional thermal pathways that bypass the limitations of conventional airflow-based cooling.
2Adaptability or versatility
If electronic devices are mounted in the center of the motherboard for optimal performance, then device functionality is improved, but cooling becomes more difficult
Solution Approach 1:
The brackets act as thermal intermediaries that decouple the thermal management function from the mechanical mounting function. Devices can be mounted in optimal positions for performance while the brackets, positioned along the motherboard perimeter, handle the heat transfer to cooling zones, thus resolving the conflict between mounting flexibility and heat dissipation.
Solution Approach 2:
The patent segments the thermal management function from the device mounting function. The motherboard handles device mounting and electrical connections, while the separate bracket structure handles thermal conduction and heat transfer to cooling zones, allowing independent optimization of both functions.
3Temperature
If more cooling airflow is provided to all areas, then cooling effectiveness is improved, but energy consumption increases
Solution Approach 1:
The brackets serve as thermal intermediaries that passively conduct heat from difficult-to-cool areas to effective cooling zones. This passive heat transfer mechanism reduces the need for high-velocity cooling airflow, thereby lowering the power consumption of fans while maintaining effective cooling.
Solution Approach 2:
The heat transfer device uses the natural heat flow from hot to cold regions, guided by the bracket structure, without requiring active intervention or high-energy cooling systems. The system leverages the existing temperature differential and thermal conduction properties to achieve cooling with minimal energy input.
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
This design effectively prevents overheating and device failure by relocating heat to areas with airflow, allowing for efficient cooling even in regions with limited or no forced convection, thereby enhancing cooling efficiency and reliability.
Implementation Method 1
The heat transfer device is arranged to conductively transfer heat from the one or more electronic devices to the brackets
Implementation Method 2
The one or more brackets are adapted to receive a cooling airflow circulated over the bracket and to convectively transfer heat into the cooling airflow
Data Source
AI summary
A server rack sub-assembly includes at least one motherboard having a perimeter; a plurality of heat-generating electronic devices mounted on the motherboard in an area of the motherboard thermally decoupled from the motherboard perimeter; one or more brackets including heat transfer surfaces and attached to the motherboard along at least a portion of the motherboard perimeter; and a heat transfer device thermally coupled to the area of the motherboard that is thermally decoupled from the motherboard perimeter and the one or more brackets. The one or more brackets are adapted to receive a cooling airflow circulated over the bracket and to convectively transfer heat into the cooling airflow and are further adapted to couple the motherboard to a server rack assembly. The heat transfer device is arranged to conductively transfer heat from the one or more electronic devices to the brackets.