Data Center Air Economizer Control for Temperature and Humidity
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Solution Overview
Problem
Data centers face challenges in maintaining optimal temperature and humidity levels due to the intolerance of electronic equipment to temperature and humidity fluctuations, which existing air economizers cannot address effectively, as they are not typically used in conjunction with data center cooling systems.
Innovation Solution
A climate control system that incorporates an air economizer, a control module, and sensors to determine the suitability of outside air for cooling, allowing it to condition the air when necessary, and adjusting the cooling percentages provided by the CRAC and outside air based on temperature and humidity readings, while also managing airflow and heat load to optimize energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If air economizer is used to cool data center, then energy consumption is reduced, but temperature and humidity control precision deteriorates
Solution Approach 1:
The system dynamically adjusts damper positions and cooling percentages based on real-time outside air conditions and data center load requirements. The control module continuously monitors temperature and humidity levels, adjusting the mix of outside air and conditioned air to maintain precision while maximizing energy savings when conditions permit.
Solution Approach 2:
The system changes operating parameters (damper positions, cooling percentages, CRAC cycling) based on outside air conditions. When outside air temperature and humidity are favorable, the system increases outside air percentage; when conditions deteriorate, it transitions to controlled conditioning modes to maintain precision.
2Loss of energy
If outside air is used for cooling, then compressor operation is reduced, but humidity control becomes difficult
Solution Approach 1:
The control module continuously monitors humidity levels inside the data center and uses this feedback to adjust the mix of outside air and conditioned air. When humidity approaches critical levels, the system reduces outside air percentage or activates CRAC units to restore proper humidity levels, ensuring equipment protection while minimizing compressor usage.
Solution Approach 2:
The system uses outside air to serve the cooling function when conditions are favorable, reducing the need for mechanical compression. The natural cooling capacity of outside air is harnessed to reduce compressor operation, with the understanding that humidity may require periodic correction through controlled conditioning.
3Reliability
If data center is sealed to protect equipment, then temperature control is improved, but energy efficiency deteriorates
Solution Approach 1:
The control module integrates multiple functions: it monitors outside air conditions, controls dampers, manages CRAC units, and adjusts cooling percentages all through a single intelligent controller. This multi-functional approach allows the sealed data center to efficiently utilize outside air when conditions permit while maintaining equipment protection through precise environmental control.
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 solution enables efficient energy savings by reducing compressor and motor operation, maintaining optimal data center conditions, and extending the life of electronic equipment, while avoiding frequent cycling and humidity-related issues.
Implementation Method 1
The air economizer introduces outside air into the building to cool the space within the building such as when the temperature of the outside air is lower than the desired temperature in the building
Implementation Method 2
Heat rejection device 124 may include air or fluid cooled heat exchangers
Data Source
AI summary
A climate control system or a data center includes a computer room air conditioner (CRAC) and an air economizer. A control module determines whether outside air is suitable for use in cooling the data. If the outside air is suitable for use, outside air and not the CRAC is used to cool the data center when the dry bulb temperature of the outside air is below a minimum set point. The outside air is conditioned before it is introduced as supply air so that it is above a minimum temperature. If the outside air is suitable for use and the dry bulb temperature of the outside air is above the set point, the control module determines a cooling percentage of cooling of the data center to be provided by the CRAC and a cooling percentage to be provided by the outside air.