Open-Loop Data Center Cooling With Oxygen-Limiting Fire Suppression
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Solution Overview
Problem
Conventional HVAC systems in data centers recycle indoor air for cooling, leading to inefficient heat removal and high energy consumption, without effectively managing temperature, humidity, and air quality, and lack effective fire suppression mechanisms.
Innovation Solution
An open-loop heat removal system that expels hot air without recycling or re-cooling, utilizing a chilling unit, inlet and outlet modules, exhaust fans, sensors, and a controller for fire suppression, including a sprinkler system activated based on temperature and oxygen levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional HVAC systems recycle indoor air for cooling, then energy consumption increases, but heat removal efficiency decreases
Solution Approach 1:
The patent extracts the hot air from the recycling loop by introducing it to the atmosphere through dedicated exhaust outlets. The system separates the intake of fresh outdoor air from the exhaust of conditioned indoor air, preventing hot air recycling while maintaining continuous cooling operation. This extraction approach eliminates the energy waste associated with re-cooling already-heated air.
Solution Approach 2:
The HVAC system is segmented into distinct functional zones: fresh air intake outlets positioned to draw in cool outdoor air, conditioned air distribution outlets for delivering cooled air to equipment, and exhaust outlets specifically for discarding hot air. This segmentation allows independent optimization of each air stream, ensuring efficient heat removal without energy-consuming air recycling.
2Temperature
If HVAC systems maintain temperature through air recycling, then temperature control is achieved, but fire suppression capability is insufficient
Solution Approach 1:
The system extracts oxygen from the indoor air environment through dedicated exhaust outlets that vent hot air and oxygen-rich conditioned air to the atmosphere. This extraction of oxygen limits the combustion support available to fires, enhancing fire suppression capability while maintaining temperature control through the continuous introduction of fresh, oxygen-poor air.
Solution Approach 2:
The exhaust system acts as an intermediary between the indoor environment and the atmosphere, mediating the oxygen level and thermal conditions. By controlling the exchange of indoor and outdoor air through strategically positioned outlets, the system creates conditions that are both temperature-appropriate for equipment operation and hostile to fire propagation.
3Loss of energy
If hot air is expelled without recycling, then energy consumption decreases, but system complexity increases
Solution Approach 1:
The exhaust outlets serve multiple functions simultaneously: they expel hot air to reduce energy consumption, control oxygen levels to suppress fire, and maintain pressure balance within the data center. This multi-functionality approach reduces the need for separate dedicated systems for each function, thereby limiting the increase in overall system complexity while achieving energy efficiency.
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
Efficiently manages temperature and humidity, reduces energy consumption, and provides automated fire suppression by expelling hot air and controlling oxygen levels, minimizing maintenance costs and enhancing safety in data centers.
Implementation Method 1
a chilling unit for supplying cool air to the building through an inlet of the building
Implementation Method 2
an exhaust fan at the outlet module
Implementation Method 3
a louver at the inlet module
Data Source
AI summary
In an open-loop heat removal system for a building such as a data center or a home, cool air is supplied to the building by a chilling unit and hot air is expelled from the building without recycling, recirculating, or re-cooling the hot air. For fire suppression, the system receives temperature reading(s) from temperature sensor(s) and determines whether any temperature reading reaches or exceeds a temperature that indicates presence of a fire. If so, a louver positioned over an inlet module is automatically or programmatically closed, shutting off air supply to the building. The system determines whether the building is under a negative pressure internally. If not, an exhaust fan at the outlet of the building is turned on to create a negative pressure internally. The system determines whether an oxygen level of the building indicates that the fire has been contained. If not, a sprinkler system is activated.