Flexible Liquid Distribution for Electronic Racks
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Solution Overview
Problem
Existing cooling systems, such as CRAC units, struggle to effectively manage thermal environments in high-power density electronic racks, limiting the configuration and redundancy of liquid cooling solutions due to fixed flow distribution ports, which restricts the placement and number of liquid-cooled equipment within the rack.
Innovation Solution
A flexible liquid distribution system with slidably coupled connecting units along a mounting rail, allowing dynamic configuration and redundancy, enabling liquid cooling to be adjusted based on the number and location of liquid-cooled equipment, and accommodating varying heat loads by creating individual heat-exchanging loops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rack manifold with fixed flow distribution ports is used, then the liquid cooling system has a determined structure, but the number and location of liquid-cooled equipment are limited to the port locations
Solution Approach 1:
The liquid distribution system is segmented into modular components: a rack manifold with multiple flow distribution ports, and multiple connecting units that can be independently attached to different ports. Each connecting unit can be independently configured to connect to liquid-cooled equipment at different locations, allowing flexible placement without requiring a completely different manifold structure.
Solution Approach 2:
The system transitions from a static fixed-connection approach to a dynamic reconfigurable approach. Connecting units can be attached to or detached from different flow distribution ports on the rack manifold, enabling the liquid cooling system to adapt to varying equipment placement configurations based on thermal management needs.
2Quantity of substance
If the number of flow distribution ports is increased to accommodate more liquid-cooled equipment, then more equipment can be liquid cooled, but the rack manifold becomes more complex and costly
Solution Approach 1:
Each connecting unit is designed as a universal component that can connect to any flow distribution port on the rack manifold. The connecting units are identical or similar in structure, allowing the system to accommodate varying numbers of liquid-cooled equipment by simply adding or removing connecting units rather than redesigning the manifold with different port configurations.
3Temperature
If liquid cooling is used for high-power density racks, then thermal management efficiency improves, but the system becomes more complex compared to air cooling
Solution Approach 1:
The liquid cooling system is divided into independent connecting units, each responsible for cooling a specific piece of liquid-cooled equipment. This segmentation allows the liquid cooling system to be selectively applied only to high-power density equipment that requires it, while other equipment can continue to use simpler air cooling, thus balancing thermal management efficiency with system complexity.
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 solution provides efficient thermal management by allowing flexible placement of liquid cooling units, increasing redundancy, and optimizing the use of cooling resources, thereby reducing costs and preventing overheating in high-power density racks.
Implementation Method 1
couple to a piece of IT equipment to circulate coolant from the main liquid supply and return unit through the piece of IT equipment to create a heat-transfer loop that transfers thermal energy away from the piece of IT equipment and into the coolant
Data Source
AI summary
According to one embodiment, a liquid distribution system includes a main liquid supply and return unit, a mounting rail that extends along at least a portion of a height of the electronic rack, and a connecting unit that is slidably coupled to the mounting rail and is coupled to the main liquid supply and return unit via a flexible supply line and a flexible return line, the connecting unit is arranged to couple to a piece of information technology (IT) equipment to circulate coolant from the main liquid supply and return unit through the piece of IT equipment to create a heat-transfer loop that transfers thermal energy away from the piece of IT equipment and into the coolant.