Ambient Air Cooling Layout for Computing Facilities
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Solution Overview
Problem
Large computing facilities face significant heat management challenges due to high power consumption by computing devices, which traditional cooling systems, such as HVAC, are inefficient in addressing, especially in environments with varying temperatures and humidity levels.
Innovation Solution
A system and method utilizing ambient air for cooling, where airflow is driven by computing device fans, with a design that includes an air inlet, air filter, mixing chamber with turbulators, and exhaust damper to recirculate and mix heated air with fresh air, minimizing pressure loss and vortices, and optimizing airflow through low-pressure-drop filters and large cross-sectional areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional HVAC systems are used to cool computing facilities, then cooling capability is provided, but energy consumption and system complexity increase
Solution Approach 1:
The computing devices themselves serve as the cooling system by using their internal fans to draw ambient air through heat-generating components. This self-cooling approach eliminates the need for separate HVAC systems, reducing energy consumption while maintaining effective temperature control
Solution Approach 2:
The cooling function is extracted from the computing devices and used to cool the ambient air in the facility. The heat generated by computing devices is utilized to cool incoming ambient air, creating a passive cooling system that reduces overall energy requirements
2Device complexity
If ambient air is used for cooling without recirculation, then system simplicity is maintained, but cooling efficiency decreases in varying environmental conditions
Solution Approach 1:
The system dynamically adjusts between ambient air intake and recirculated air based on environmental conditions. A damper mechanism controls the mixture of fresh ambient air and recirculated cooled air, allowing the system to adapt to varying temperature and humidity conditions while maintaining cooling efficiency
Solution Approach 2:
The air handling system serves multiple functions: it provides fresh ambient air for cooling, recirculates cooled air to maintain temperature control, and mixes the two air streams to optimize cooling efficiency under different environmental conditions
3Reliability
If air filters with high filtration capability are used, then air quality improves, but pressure loss and airflow resistance increase
Solution Approach 1:
The system changes the pressure parameter by utilizing the high static pressure capability of computing device fans. This allows the use of higher efficiency filters that would normally create excessive pressure drop, as the fans can overcome the filtration resistance while maintaining adequate airflow
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 effectively cools computing devices using ambient air, reducing the need for conventional HVAC systems and minimizing stress on device fans, while maintaining efficient airflow and temperature control, even in varying environmental conditions.
Implementation Method 1
Some, most, or substantially each of the computing devices include a fan that is capable of moving the cool air across one or more heat generating components of the computing device to cool the heat generating components
Implementation Method 2
The exhaust air space is configured to exhaust or vent heated air generated from the computing devices inside the facility to the external environment
Data Source
AI summary
A system for cooling computing devices within a facility includes an air inlet that delivers cool air to a supply air space within the facility, an exhaust air damper that is configured to exhaust heated air from an exhaust air space within the facility, and computing devices that are arranged within the facility to at least partially partition the supply air space from the exhaust air space. The system also includes an air filter that is configured to filter the cool air and a mixing damper that is positioned within the interior space of the facility and that is operable to control an amount of exhaust air that is mixed with the cool air. The cool air and/or a portion of the exhaust air are used to cool the computing devices and airflow through the system is substantially driven by fans of the computing devices.