Variable Air Cooling with Free-Cooling Control for Data Centers
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Solution Overview
Problem
Existing cooling systems for high-density data centers face inefficiencies due to the inability to provide direct free cooling and compatibility issues with low-density areas, along with complex control challenges for outside air temperature and humidity management.
Innovation Solution
A variable air cooling system that includes controllable inputs for outside and recycled air, a selectively activatable cooling mechanism, and a control system monitoring outside and blowing air temperatures to optimize temperature and humidity, using a heat exchanger with a secondary water circuit and humidifier to maintain a predefined temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If free cooling systems are used for low density data centers, then energy efficiency is improved, but temperature and humidity control becomes complicated requiring multiple interfering control loops
Solution Approach 1:
The control system is segmented into multiple independent control loops, each managing a specific function (outside air inlet, recycled air inlet, cooling mechanism). This segmentation allows each loop to operate independently without interfering with others, simplifying the overall control architecture while maintaining energy efficiency
Solution Approach 2:
The patent introduces a control system that acts as an intermediary between the various cooling components and the environment. It mediates the complex interactions by implementing a hierarchical control strategy that coordinates outside air intake, recycled air mixing, and cooling mechanism activation, thereby simplifying the management of temperature and humidity control
2Temperature
If cooling doors or containers are used for high density data centers, then cooling capability is improved, but energy efficiency deteriorates due to inability to provide direct free cooling
Solution Approach 1:
The system dynamically adjusts the cooling strategy based on real-time conditions. The control system continuously monitors temperature and automatically switches between free cooling mode (when outside air is cool enough) and active cooling mode (when additional cooling is needed), optimizing energy efficiency while maintaining adequate cooling capability for high density environments
Solution Approach 2:
The patent changes the operating parameters of the cooling system by adjusting the mix of outside air and recycled air, and by controlling the activation of the cooling mechanism based on monitored temperature conditions. This allows the system to adapt to varying heat loads and outdoor conditions, achieving both cooling capability and energy efficiency
3Temperature
If active rear door rack cooling systems are used, then cooling is provided for high density configurations, but compatibility with existing low density areas deteriorates
Solution Approach 1:
The cooling system is designed with universal applicability through its modular architecture and flexible control strategy. It can operate effectively in both high density configurations (activating cooling mechanism with controlled air mixing) and low density areas (using primarily free cooling with minimal active intervention), making it adaptable to various data center densities without requiring infrastructure changes
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 achieves direct air free cooling with improved energy efficiency for both high-density and low-density environments, allowing for reconfiguration without infrastructure investment and avoiding airflow disturbances.
Implementation Method 1
The cooling mechanism may include a secondary water circuit with a valve to adapt the water temperature of the heat exchanger
Implementation Method 2
The cooling system may include a humidifier for selectively controlling the hygrometry of the air in the cooling system
Data Source
AI summary
A method and system for variable air cooling for data centers. The system may include: an enclosure to be cooled suitable for housing hardware components; a cooling system including: a first air input for controllably allowing input of outside air from outside the enclosure; a second air input for controllably allowing input of recycled air from the enclosure; a selectively activatable cooling mechanism; an air output for allowing output of air into the enclosure; a first temperature monitor for monitoring an outside air temperature of air outside the enclosure; a second temperature monitor for monitoring a blowing air temperature of air at the air output; and a control mechanism for controlling an operation of the first air input, the second air input, and the cooling mechanism dependent on a monitored outside air temperature at the first temperature monitor and a monitored blowing air temperature at the second temperature monitor.