Airflow Control System with External Air Dampers for Data Center Cooling
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Solution Overview
Problem
Existing data center cooling systems face inefficiencies in heat removal due to non-uniform waste heat generation across different components, as uniform cooling methods may not effectively address varying heat output from high-density and low-density rack systems.
Innovation Solution
A cooling system with air channeling sub-systems that include outside and return air dampers, temperature sensors, and a controller to adjust air flow based on wet bulb temperature, allowing outside air intake when it drops below a predetermined temperature, and deactivating heat removal sub-systems in free cooling mode to optimize cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uniform heat removal methods are applied to non-uniform waste heat generation sources, then system simplicity is maintained, but cooling efficiency deteriorates
Solution Approach 1:
The cooling system is divided into multiple independent air channeling sub-systems, each capable of serving specific rack groups. Each sub-system can be independently controlled to match the non-uniform heat generation patterns of different rack configurations, thereby improving cooling efficiency without requiring complete system redesign
Solution Approach 2:
The system incorporates variable speed fans and adjustable dampers in each air channeling sub-system that can dynamically adjust air flow rates based on real-time temperature sensor feedback. This dynamic control enables the system to adapt to changing heat generation patterns while maintaining optimal cooling efficiency
2Reliability
If heat removal sub-systems operate continuously, then cooling reliability is maintained, but energy consumption increases
Solution Approach 1:
The system uses temperature sensors and controllers to automatically detect when outside air temperature drops below a predetermined threshold and autonomously switches to free cooling mode. This self-regulating mechanism eliminates the need for continuous operation of heat removal sub-systems while maintaining cooling reliability through passive environmental cooling
Solution Approach 2:
The system changes its operating parameters based on outside air temperature conditions. When outside air temperature is favorable (below threshold), the system switches to free cooling mode with minimal energy consumption. When outside air temperature is unfavorable, the system activates heat removal sub-systems to maintain cooling reliability, thus optimizing energy consumption across different environmental conditions
3Use of energy by moving object
If outside air is introduced for free cooling, then energy consumption is reduced, but temperature control precision deteriorates
Solution Approach 1:
Temperature sensors are positioned throughout the data center to provide real-time feedback on rack temperatures. Controllers use this feedback to monitor whether free cooling mode maintains acceptable temperature differentials. When temperature control precision is compromised, the system automatically transitions to active cooling mode, ensuring both energy efficiency and temperature control precision are maintained
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 approach reduces installation and operational costs by eliminating expensive components, enhances cooling efficiency, and maintains desired temperature differentials across racks, thereby improving overall data center cooling performance.
Implementation Method 1
at least one temperature sensor that measures a wet bulb temperature of outside air
Implementation Method 2
at least one heat removal sub-system that removes heat from the cooling air in at least one of the air channeling sub-systems
Data Source
AI summary
A cooling system includes one or more air channeling sub-systems that provide cooling air to electronic equipment, at least one heat removal sub-system that removes heat from the cooling air in at least one of the air channeling sub-systems, at least one temperature sensor measures a wet bulb temperature of outside air, and at least one controller. At least one of the air channeling sub-systems includes an outside air damper operable allow outside air into the air channeling sub-system. The at least one controller at least partially opens the outside air damper if a wet bulb temperature measured at the at least one temperature sensor drops to or below a predetermined temperature.