Leak Segregation Chassis for Electronics Rack Cooling
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Solution Overview
Problem
High-power density electronics racks in data centers face thermal management challenges, leading to potential server failures due to inadequate thermal control, and leaks from liquid cooling systems can damage equipment by allowing fluid to come into contact with electronics.
Innovation Solution
A leak segregation and detection system is implemented, comprising an equipment cooling module with a leak segregation chassis and a rack cooling module that includes a manifold section, detection section, and main leak segregation structure to contain and guide leaks away from electronics, and a leak detection cable to identify leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If liquid cooling is implemented to manage thermal environment, then thermal management performance is improved, but risk of fluid leak damage to electronics increases
Solution Approach 1:
The cooling system is divided into separate modules (equipment cooling module and rack cooling module) with independent leak segregation chassis. Each module has its own containment structure that isolates potential leaks to specific zones, preventing spread throughout the entire rack. This segmentation allows the system to maintain thermal management benefits while limiting damage scope in case of leaks.
Solution Approach 2:
A leak detection cable acts as an intermediary sensing element positioned between the cooling fluid pathways and the electronics. When fluid leaks occur, the cable detects the presence of liquid and triggers alerts, enabling early intervention before the leak can cause damage to electronic components. This intermediary detection mechanism bridges the gap between leak occurrence and protective action.
2Reliability
If leak segregation structure is added to contain leaks, then reliability is improved, but device complexity increases
Solution Approach 1:
The leak segregation chassis is merged with the existing equipment cooling module structure, combining the containment function with the cooling function in a single integrated unit. Similarly, the rack cooling module incorporates leak detection cables within its existing manifold and connector structure. This merging approach adds leak containment capability without requiring entirely separate, independent systems, thereby limiting the increase in overall complexity.
Solution Approach 2:
The leak segregation chassis serves multiple functions: it contains cooling fluid pathways, provides leak containment boundaries, and integrates with both equipment and rack cooling modules. The leak detection cable simultaneously detects leaks, triggers alerts, and enables localized shutdown responses. This multi-functionality reduces the need for additional separate components, managing complexity while improving reliability.
3Loss of time
If leak detection cable is installed to detect leaks early, then response time is improved, but manufacturing cost increases
Solution Approach 1:
The leak detection cable is designed to be self-activating through its conductive properties. When cooling fluid contacts the cable, the liquid conducts electricity and automatically triggers the detection signal without requiring external power sources, complex electronics, or manual monitoring. This self-service mechanism enables rapid leak detection while keeping the manufacturing cost low by using simple conductive materials rather than expensive active sensing components.
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 effectively segregates and detects leaks, preventing damage to electronics by containing leaks within the cooling module and alerting for necessary shutdowns, thus ensuring reliable operation of high-power density data center equipment.
Implementation Method 1
the leak detection cable is arranged in the channel to detect a presence of liquid that flows into the channel from one or more of the openings into the channel, and is communicatively coupled to a controller, the leak detection cable comprising a first conductor and a second conductor that are in electrical communication with one another when dry, the leak detection cable comprising the first conductor and the second conductor that come into electrical contact when liquid flows into the channel from one or more of the openings into the channel, thereby generating the control signal
Data Source
AI summary
According to one embodiment, a system for a rack includes an equipment module for coupling to a rack module. The rack module includes a pair of main connectors for coupling to a coolant source and a pair of manifold connectors, and includes a vertical leak detection channel that has a leak detection cable. Positioned between the main connectors and the manifold connectors is a structure that at least partially contains the main connectors and has a liquid path to the channel. The equipment module includes a chassis that has a pair of connectors and a conducting path. The chassis also has an opening for receiving the manifold connectors for coupling to the connectors, and another opening, the conducting path extends from an interior of the chassis to the other opening and is arranged to guide liquid out of the opening and into the channel while both modules are coupled together.