Coolant Distribution Unit Layout for Live Liquid-Cooling Maintenance
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Solution Overview
Problem
Traditional air cooling methods are inadequate for effectively managing heat in high-power density electronic components, leading to overheating issues in data centers, which can degrade computing performance and reduce system lifetime.
Innovation Solution
A high-density liquid cooling system with a coolant distribution unit (CDU) that includes a rack-mounted liquid-to-liquid heat exchanger, bypass valves, and redundant pumping systems to maintain cooling capacity during maintenance, allowing for modular installation and serviceability without downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional air cooling methods are used, then the system structure is simple, but heat removal capability is insufficient for high-power density electronic components
Solution Approach 1:
The patent transitions from air cooling to liquid cooling by implementing a closed-loop hydraulic system with coolant circulation. The liquid cooling system uses pumps, heat exchangers, and distribution manifolds to efficiently remove heat from high-power density electronic components, achieving superior thermal management compared to traditional air cooling methods.
2Power
If liquid cooling systems are implemented, then heat removal efficiency increases, but system complexity and installation difficulty increase
Solution Approach 1:
The cooling system is divided into modular components including separate distribution manifolds for primary and secondary loops, individual pump assemblies, and discrete heat exchanger units. This segmentation allows for easier installation, maintenance, and scalability, as components can be independently configured and replaced without affecting the entire system.
Solution Approach 2:
The distribution manifolds are designed with universal mounting interfaces and standardized connection points that can accommodate various electronic component configurations. The system can serve multiple functions including cooling different types of electronic components, supporting both primary and secondary coolant loops, and providing integrated flow distribution and collection in a single manifold structure.
3Temperature
If coolant distribution units are added for liquid cooling, then thermal management improves, but pressure drops and power consumption increase
Solution Approach 1:
The system employs variable speed pumps that can dynamically adjust their operating speed based on the thermal load and cooling requirements. This dynamic control allows the system to optimize power consumption by running pumps at lower speeds when full cooling capacity is not needed, while still maintaining effective thermal management when high heat removal is required.
Solution Approach 2:
The distribution manifolds incorporate flow distribution features that ensure adequate coolant flow to all required locations without excessive pressure losses. The system is designed to provide just sufficient cooling capacity for each zone rather than over-cooling, thereby reducing the overall power consumption of the pumping system while maintaining effective thermal management.
4Power
If heat exchangers are installed for heat transfer, then cooling capacity increases, but system footprint and space requirements increase
Solution Approach 1:
The heat exchanger is integrated within the distribution manifold structure, with the heat exchange surfaces nested within or attached to the manifold body. This nested configuration allows the heat exchanger to utilize the internal volume of the manifold, thereby reducing the overall system footprint while maintaining adequate cooling capacity. The compact integrated design eliminates the need for separate, space-consuming heat exchanger 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 efficiently transfers heat from secondary to primary coolant loops, reducing pressure drops and power consumption while enabling maintenance of components during operation, thereby extending the uptime and performance of data center equipment.
Implementation Method 1
CDUs typically include a liquid to liquid heat exchanger, which allows heat transfer from coolant in a secondary loop to a primary loop
Data Source
AI summary
Embodiments of the invention provide a system and method for housing electrical components of a high-density liquid cooling unit to liquid cool electrical components. The system includes a first electrical cabinet housing at least one electrical switch and a controller. The first electrical cabinet is swingable outward to open, and the first electrical cabinet opens while the high density liquid cooling system continues to operate to liquid cool electrical components. The system includes a second electrical cabinet housing a first motor drive and a second motor drive. The second electrical cabinet is accessible when the first electrical cabinet swings outward. One of the first motor drive and the second motor drive are replaceable while the high density liquid cooling unit continues to operate.