Server Room Airflow Control Using Outside Air and Humidity Zones
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Solution Overview
Problem
Conventional air conditioning systems for server rooms face challenges in efficiently managing temperature and humidity gradients, leading to suboptimal operating conditions and increased energy consumption due to the heat generated by servers.
Innovation Solution
An air conditioning system with a controller that adjusts the flow rates of outside and return air, humidification, and cooling processes based on measured temperature and humidity levels to maintain target ranges, utilizing a psychrometric chart to determine optimal control zones and minimize energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional air conditioning systems cool server rooms by sucking air from lower space and blowing it to upper space, then temperature gradient within the room is reduced, but energy consumption increases due to insufficient consideration of outside air conditions and humidity control
Solution Approach 1:
The system changes operational parameters by switching between different air supply modes (inside air recirculation, outside air introduction, or mixed mode) based on measured outside air temperature and humidity conditions. This allows the system to utilize favorable outside air conditions for free cooling, thereby reducing energy consumption while maintaining effective temperature distribution in the server room.
Solution Approach 2:
The system employs feedback control by continuously measuring outside air temperature and humidity, comparing these conditions against predetermined thresholds, and automatically adjusting the air supply mode accordingly. This feedback mechanism enables the system to respond dynamically to environmental changes and optimize energy consumption without manual intervention.
2Reliability
If conventional air conditioning systems maintain supply air conditions within predetermined ranges, then servers operate normally, but energy efficiency is suboptimal due to lack of adaptive control based on outside air conditions
Solution Approach 1:
The system transitions from static predetermined temperature control to dynamic adaptive control that continuously adjusts air supply modes based on real-time outside air conditions. The controller dynamically selects between recirculation mode, outside air mode, or mixed mode to maintain server room conditions within acceptable ranges while optimizing energy efficiency according to environmental variations.
Solution Approach 2:
The system changes operational parameters by switching between different air supply modes (inside air recirculation, outside air introduction, or mixed mode) based on measured outside air temperature and humidity conditions. This allows the system to utilize favorable outside air conditions for free cooling, thereby reducing energy consumption while maintaining effective temperature distribution in the server room.
3Manufacturing precision
If humidification and cooling processes are continuously applied, then target humidity and temperature ranges are maintained, but energy consumption increases without considering outside air conditions
Solution Approach 1:
The system employs feedback control by continuously measuring outside air temperature and humidity, comparing these conditions against predetermined thresholds, and automatically adjusting the air supply mode accordingly. This feedback mechanism enables the system to respond dynamically to environmental changes and optimize energy consumption without manual intervention.
Solution Approach 2:
The system utilizes favorable outside air conditions to provide free cooling and humidification, reducing the need for mechanical cooling and humidification equipment operation. When outside air conditions are favorable (lower temperature and appropriate humidity), the system introduces outside air directly, allowing the environment to serve the cooling and humidification needs without additional energy input.
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 effectively maintains target temperature and humidity ranges within server rooms, optimizing energy efficiency and reducing energy consumption by utilizing outside air and return air in a controlled manner, ensuring efficient air-conditioning control with a high energy-saving effect.
Implementation Method 1
a cooler for cooing at least one of the outside air and the return air
Implementation Method 2
a humidifier for humidifying at least one of the outside air and the return air
Data Source
AI summary
According one embodiment, an air-conditioning system is connected to a server room, in which server racks accommodating a plurality of servers are placed between separated first and second spaces, by a return air duct and a supply air duct. In the server room, an airflow is formed so that cold air flown from under the floor into the first space is heated by heat generation of the servers and is flown out from the second space as return air. The system sets control contents for generating supply air within a previously determined supply air temperature target range and a previously determined supply air humidity target range and controls the operation of each device in the system based on the set control contents.