Heat Pipe Thermal Coupling for Server Node Temperature Distribution
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Solution Overview
Problem
Current multi-node servers face inefficiencies in cooling due to preheated airflow from upstream nodes, leading to higher operating temperatures and decreased performance in downstream nodes, as each node relies on independent heat sinks without effective thermal load distribution.
Innovation Solution
Thermal management features that thermally couple heat sinks using heat pipes to transfer thermal energy from hotter downstream nodes to cooler upstream nodes, ensuring more even thermal distribution across nodes, with vapor sections of adjacent heat pipes overlapping for enhanced heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If independent heat sinks are used for each node, then each node can be cooled individually, but downstream nodes experience preheated airflow and higher operating temperatures
Solution Approach 1:
The patent merges the thermal management of multiple nodes by thermally coupling heat sinks from different nodes using heat pipes. This allows downstream nodes to transfer excess heat to upstream nodes, effectively combining their thermal management resources to overcome the preheated airflow problem and maintain lower operating temperatures for all nodes.
Solution Approach 2:
The patent introduces heat pipes as intermediary thermal conduction elements between heat sinks of different nodes. These heat pipes act as mediators that transfer thermal energy from downstream nodes (experiencing preheated airflow) to upstream nodes (receiving cooler airflow), thereby balancing the thermal load across the server.
2Device complexity
If compute nodes are aligned in series with airflow, then the server structure is simplified, but temperature distribution becomes uneven across nodes
Solution Approach 1:
The patent extracts the thermal load from downstream nodes and transfers it to upstream nodes through heat pipes. This separation of thermal management functions allows the server to maintain a simple series airflow structure while achieving more uniform temperature distribution by removing excess heat from where it accumulates (downstream) and relocating it to where cooling is more effective (upstream).
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 approach distributes thermal load more evenly, reducing operating temperatures and improving cooling efficiency across all nodes, thereby enhancing performance and maintaining consistent thermal characteristics across the server.
Implementation Method 1
heat pipes to transfer thermal energy from hotter downstream nodes to cooler upstream nodes
Implementation Method 2
thermally couple heat sinks using heat pipes to transfer thermal energy
Implementation Method 3
vapor sections of adjacent heat pipes overlapping for enhanced heat transfer
Data Source
AI summary
Embodiments of the present disclosure describe servers having thermal management features and thermal management systems for servers. These embodiments include heat sinks to be thermally coupled by one or more heat pipes to transfer heat from hotter downstream heat sinks to cooler upstream heat sinks in order to distribute thermal loading across multiple devices. In one embodiment a single heat pipe may be used to thermally couple two heat sinks, whereas in other embodiments a modular heat pipe arrangement may be used. Techniques for thermally coupling modular heat pipes to one another such that vapor sections of adjacent heat pipes overlap are also disclosed. Other embodiments may be described and/or claimed.