Rack Air Cooling Loop for Data Center Hotspot Control
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Solution Overview
Problem
Current cooling systems for data centers, such as CRAC units, are inefficient in addressing hotspots and pose hazards due to water leakage, and are difficult to reconfigure with complex plumbing and cabling.
Innovation Solution
An air-based cooling system using a closed-loop air coolant circuit that operates at low pressure and high velocity, with modular units and specialized conduits and connectors for easy reconfiguration, and chiller units integrated into equipment racks to direct chilled air to hotspots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If water cooling systems are used to address hotspots, then cooling efficiency is improved, but system reliability deteriorates due to potential water leakage hazards
Solution Approach 1:
The patent replaces water (a hazardous coolant) with air (a benign coolant). Air is inherently safe, inexpensive, and poses no leakage hazards to electronic equipment. This substitution maintains cooling functionality while eliminating the reliability risks associated with water cooling systems.
2Temperature
If conventional water cooling plumbing is installed, then cooling capacity is improved, but device complexity increases due to cabling and plumbing requirements
Solution Approach 1:
The patent extracts the coolant delivery system from complex water plumbing infrastructure and replaces it with simple air distribution ducts and vents. This removes the need for complex piping, valves, and water treatment systems while maintaining effective cooling delivery to hotspots.
Solution Approach 2:
The patent uses pneumatic (air-based) cooling instead of hydraulic (water-based) cooling. Air is circulated through ducts and delivered to equipment hotspots, providing cooling capacity without the complexity of water plumbing, pumps, and pressure management systems.
3Temperature
If CRAC units increase air volume and cooling capacity, then cooling performance is improved, but energy consumption increases
Solution Approach 1:
The patent delivers cooling capacity locally to specific hotspots rather than cooling the entire data center environment. By targeting only the areas that require cooling, the system achieves effective temperature control with significantly reduced energy consumption compared to general CRAC unit operation.
Solution Approach 2:
The system uses the heat generated by equipment to drive natural convection currents, reducing the need for high-power forced air circulation. The cooling process partially self-regulates through thermal buoyancy, decreasing energy requirements for air movement while maintaining effective heat extraction.
4Adaptability or versatility
If data centers are reconfigured to address changing needs, then adaptability is improved, but cooling system flexibility deteriorates due to fixed plumbing
Solution Approach 1:
The patent implements a dynamic cooling system where air ducts and vents can be easily repositioned, adjusted, or reconfigured. Unlike fixed water plumbing, the air-based system allows for flexible adaptation to changing data center layouts and equipment arrangements without requiring specialized plumbing services.
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 reduces the risk of damage from coolant leakage, simplifies maintenance, and allows for flexible reconfiguration and increased cooling capacity by circulating air at high speed and low pressure, providing efficient heat extraction from electronic equipment.
Implementation Method 1
Heat is then exchanged between the closed loop coolant circuit and ambient air so as to cool the ambient air. The cooled ambient air can then be flowed across a heat transfer surface of the electronic equipment to extract heat from the electronic equipment.
Data Source
AI summary
A high-velocity low-pressure cooling system (100), especially suited for data center applications, includes an air coolant loop (102), a non-air coolant loop (104) and a cooler unit (126) for heat transfer between the loops (102 and 104). The air loop (102) is used to chill ambient air that is blown across heat transfer surfaces of equipment mounted in data center racks (110). In this manner, effective cooling is provided using a coolant that is benign in data center environments.