Compressed-Air Busbar Cooling for High-Heat Computing Racks
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Solution Overview
Problem
Existing cooling systems for Information Handling Systems (IHS) face challenges in effectively managing the increased heat generated by high-power components, particularly in data centers, where passive airflow and liquid cooling methods are limited by manufacturing complexities and safety risks.
Innovation Solution
A busbar design utilizing compressed air for active cooling, incorporating expansion valves, air-turbulence-inducing structures, and airflow restrictors to enhance heat dissipation within the busbar channels, thereby improving safety and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If liquid cooling systems are used to remove heat from IHS components, then heat dissipation effectiveness is improved, but manufacturing complexity and safety risks increase
Solution Approach 1:
The patent extracts the cooling function from complex liquid cooling systems and implements it using simpler air cooling mechanisms within the busbar structure. The cooling channels are integrated directly into the busbar, eliminating the need for separate liquid cooling loops, manifolds, and fluid handling systems.
Solution Approach 2:
The patent uses compressed air flow through internal channels as a pneumatic cooling system. The busbar contains internal passages that allow compressed air to flow through, carrying away heat from the conductive elements without requiring liquid coolant and associated complex infrastructure.
2Temperature
If liquid cooling systems are used to remove heat from IHS components, then heat dissipation effectiveness is improved, but safety risks increase
Solution Approach 1:
The patent converts the potential harm of complex liquid cooling systems (leaks, contamination, failure modes) into a beneficial simple air cooling system. By using compressed air that is already present in data centers, the system eliminates safety risks associated with liquid handling while maintaining effective heat removal.
Solution Approach 2:
The patent uses air, an inert and non-contaminating gas, as the cooling medium instead of liquid coolant. This eliminates risks of liquid leakage, electrical short circuits, and contamination of sensitive electronic components, providing a inherently safer cooling approach.
3Temperature
If compressed air is expanded through valves into busbar channels, then cooling effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent merges the cooling function with the power distribution structure by integrating cooling channels directly into the busbar. The expansion valves are strategically positioned at terminal points, and the cooling passages are formed as part of the busbar manufacturing process, combining structural and thermal management functions.
Solution Approach 2:
The busbar design allows compressed air to self-regulate its flow through the internal channels based on pressure differentials created by heat accumulation. The system uses the natural expansion and flow characteristics of compressed air to distribute cooling throughout the busbar structure without requiring complex 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 compressed-air-cooled busbar design effectively manages heat loads, enhances mechanical stability, and increases safety margins by avoiding liquid cooling hazards, while maintaining high current capacity and reducing the risk of failure due to insufficient airflow or insulation issues.
Implementation Method 1
An expansion valve is coupled to at least one of the open channels at the first end and is configured to expand air passed from a compressed-air source into the at least one open channel
Implementation Method 2
the open channels further comprise one or more air-cooling fins extending from an interior wall into the open channel
Implementation Method 3
an airflow restrictor that is attached to the second end of at least one rail. The airflow restrictor is configured to increase air pressure within the open channel of the at least one rail
Data Source
AI summary
A busbar for a computing rack is disclosed. The busbar comprises a pair of electrically conductive rails each having a first end and a second end. The pair of rails are configured to provide opposite voltage polarities to devices mounted in the computing rack. The open channels are enclosed within each of the rails and extend from the first end to the second end in each respective rail. An expansion valve is coupled to the open channels at the first end and is configured to expand air passed from a compressed-air source into the at least one open channel while the pair of rails are attached to an electrical power source. An input end cap is attached to the first end of at least one of the rails. The input end cap provides a manifold for routing air from the expansion value into the at least one open channel.