Redundant Liquid Distribution for Data Center Cooling
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Solution Overview
Problem
Current rack-level liquid cooling systems in data centers create a single failure point, leading to shutdowns of all IT equipment if a failure occurs, and modifying these systems to be redundant is challenging without corresponding changes to the IT equipment.
Innovation Solution
A redundant liquid distribution system with a Redundant Coolant Control Unit (RCCU) and a flowrate-based control system that allows for self-activation of a direct-connection loop, eliminating the single failure point without requiring modifications to the facility or IT equipment, ensuring continuous operation during failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single manifold liquid cooling system is used, then the system complexity is low and cost is reduced, but the reliability deteriorates because a single failure point causes all IT equipment to shut down
Solution Approach 1:
The liquid cooling system is divided into multiple independent manifolds (first manifold and second manifold) that operate in parallel. Each manifold can independently cool IT equipment without affecting the other, eliminating the single failure point while maintaining manageable system complexity through modular architecture
Solution Approach 2:
The system incorporates redundant manifolds as a preventive measure before failures occur. When one manifold fails, the other manifold is already in place and can immediately take over, providing beforehand cushioning against system failure and ensuring continuous operation
2Reliability
If redundant liquid cooling manifolds are added, then the reliability improves by eliminating single failure points, but the device complexity and cost increase
Solution Approach 1:
Each manifold is designed as a universal cooling unit that can independently provide full cooling functionality to all IT equipment. The manifolds use identical configurations and connection interfaces, allowing either manifold to perform the complete cooling function, thereby reducing design complexity through standardization
Solution Approach 2:
The system uses identical copies of the manifold design (first manifold and second manifold with matching configurations). This copying approach simplifies the overall system design by repeating a proven, standardized unit rather than designing complex asymmetric redundancy, reducing both design and operational complexity
3Productivity
If rack-level liquid cooling is implemented, then the cooling efficiency improves for high-density IT equipment, but the ease of operation deteriorates due to integration requirements between rack and equipment
Solution Approach 1:
The cooling system is segmented into rack-level manifolds that interface with equipment-level cooling components. This segmentation allows independent optimization of rack infrastructure and equipment design, improving cooling efficiency while reducing integration complexity by creating clear boundaries between system levels
Solution Approach 2:
The manifolds are designed with universal connection interfaces and standardized mounting configurations that work with multiple types of IT equipment. This universality maintains high cooling efficiency for dense equipment while improving ease of operation by eliminating the need for custom integration solutions for each equipment type
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 eliminates the risk of a single failure point, maintaining IT equipment operation and cooling efficiency even during manifold impairments or failures, without significantly increasing costs.
Implementation Method 1
liquid cooling systems that interface with the internal liquid cooling systems of the IT equipment
Implementation Method 2
heat must be removed from the IT equipment to keep it operating properly
Data Source
AI summary
Embodiments are disclosed of a rack cooling apparatus, more specially, a rack fluid control and management unit with a first pair of fluid lines including a first supply line and a first return line and a second pair of fluid lines including a second supply line and a second return line. The first supply line and the first return line are adapted to be coupled to a first rack manifold and the second supply line and the second return line are adapted to be coupled to a second rack manifold in the same rack as the first rack manifold. First and second bi-directional fluid lines fluidly couple the first supply line to the second supply line.