Open-Loop Data Center Cooling With Oxygen-Limiting Fire Control
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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, as they are not designed to continuously bring in fresh outdoor air.
Innovation Solution
An open-loop heat removal system that expels hot air without recycling, recirculating, or re-cooling it, utilizing a chilling unit, inlet and outlet modules, exhaust fans, sensors, and a controller to manage airflow and suppress fires by creating a negative pressure and reducing oxygen levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional HVAC systems recycle indoor air for cooling, then energy consumption is reduced, but heat removal efficiency deteriorates
Solution Approach 1:
The patent inverts the conventional HVAC approach by using an open-loop system that exhausts hot air directly instead of recycling it. The system brings in fresh outdoor air, cools it, and supplies it to the data center, while exhaust fans continuously remove hot air. This inversion of the recirculation model achieves both energy efficiency and effective heat removal by preventing hot air from being re-cooled.
2Reliability
If HVAC systems continuously bring in fresh outdoor air, then fire safety is improved, but energy consumption increases
Solution Approach 1:
The system uses the data center's own hot air exhaust to create negative pressure that drives the intake of fresh cool air. The exhaust fans continuously remove hot air, creating a pressure differential that automatically pulls in fresh air without requiring additional energy-intensive fans or blowers. This self-service mechanism maintains fire safety through continuous fresh air supply while minimizing energy consumption.
3Reliability
If open-loop heat removal system expels hot air without recycling, then fire suppression capability is improved, but system complexity increases
Solution Approach 1:
The system integrates multiple functions into a unified open-loop heat removal architecture. The same chilling unit that provides cooling also works with exhaust fans to create negative pressure for fresh air intake. The controller manages both cooling operations and fire safety monitoring, making the system multi-functional. This universality reduces overall system complexity compared to having separate dedicated systems for cooling and fire suppression.
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 system efficiently manages climate conditions in data centers, minimizes energy use, reduces maintenance costs, and effectively suppresses fires by expelling hot air and controlling oxygen levels, thus optimizing heat removal and fire safety.
Implementation Method 1
determining, utilizing a pressure sensor, whether the building is under a negative pressure internally; responsive to the building not being under a negative pressure internally, operating the exhaust fan to create a negative pressure internally
Implementation Method 2
a chilling unit for supplying cool air to the building through an inlet of the building
Implementation Method 3
determining, utilizing an oxygen sensor, whether an internal oxygen level of the building has decreased to a point that indicates that the fire has been contained
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.