Supplemental Heater for Cold Outside Air Data Center Cooling
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Solution Overview
Problem
Data centers face operational integrity issues due to outside air temperatures being too cold or humid, leading to potential component failure or damage, as traditional heat removal systems may not adequately warm the cooling air to maintain minimum operating temperatures and prevent condensation.
Innovation Solution
A modular data center cooling system that includes an air handling unit with a supplemental heater, controlled by a controller that senses air characteristics and triggers heating to ensure the cooling air meets minimum temperature and humidity thresholds, preventing condensation and maintaining component reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If outside air is used for cooling the data center, then cooling efficiency is improved, but the air temperature may fall below the minimum operating temperature threshold causing component failure
Solution Approach 1:
The system continuously monitors the temperature of outside air entering the data center and compares it against a predetermined minimum operating temperature threshold. When the temperature falls below the threshold, the controller automatically activates the supplemental heating system to warm the air before it enters the facility, and deactivates heating when temperature rises above the threshold, creating a closed-loop feedback control mechanism that maintains reliability while preserving cooling efficiency.
Solution Approach 2:
A supplemental heating system acts as an intermediary between the cold outside air and the data center components. The heating system temporarily warms the air that has fallen below the minimum operating temperature, serving as a protective buffer that allows the data center to continue using efficient outside air cooling without exposing components to damaging low temperatures.
2Use of energy by stationary object
If outside air is used for cooling the data center, then cooling cost is reduced, but humidity in the air may cause condensation damaging IT components
Solution Approach 1:
The system continuously monitors humidity levels of the outside air and compares them against safety thresholds. When humidity exceeds the threshold and condensation risk increases, the controller activates the supplemental heating system to reduce moisture content through evaporation, and deactivates heating when humidity levels return to safe ranges, providing continuous protection against condensation while maintaining cost-effective outside air cooling.
Solution Approach 2:
The supplemental heating system serves as an intermediary protective layer between high-humidity outside air and sensitive IT components. By selectively warming the air when humidity thresholds are exceeded, the system prevents condensation formation on cold surfaces without requiring continuous heating, thus protecting components while preserving the energy benefits of outside air cooling.
3Reliability
If supplemental heating is continuously applied, then minimum temperature is maintained, but energy consumption increases
Solution Approach 1:
Instead of continuous operation, the supplemental heating system operates periodically based on real-time temperature monitoring. The controller activates heating only during periods when outside air temperature falls below the minimum operating threshold and deactivates it when temperature rises above the threshold, creating an on-demand periodic operation pattern that maintains reliability while minimizing energy consumption.
Solution Approach 2:
The system uses the natural thermal properties of outside air itself as the primary cooling source, requiring supplemental heating only when nature fails to meet minimum temperature requirements. This self-service approach allows the system to leverage free cooling from outside air whenever possible, activating expensive supplemental heating only as a corrective measure when naturally available cooling becomes insufficient.
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 cooling air above the minimum operating temperature and within safe humidity levels, preventing component damage and ensuring reliable operation by dynamically adjusting supplemental heating based on compute workload and environmental conditions.
Implementation Method 1
A supplemental heater is positioned to transfer supplemental heat to the cooling air before the cooling air reaches the one or more IT modules of the MDC
Implementation Method 2
an air handling unit (AHU) that circulates cooling air through one or more information technology (IT) modules of the MDC
Data Source
AI summary
Cooling system of modular data center (MDC) has air handling unit (AHU) that circulates cooling air through information technology (IT) module(s). Transducer(s) sense first air characteristic value of cooling air directed to IT module(s) of MDC, the value being selected one of: (i) temperature value; and (ii) humidity value. AHU controller determines whether first air characteristic value satisfies first air characteristic criterion of one of: (i) a temperature value equal to or greater than minimum temperature threshold; and (ii) a humidity value equal to or less than maximum humidity threshold. In response to determining that first air characteristic criterion is not satisfied, AHU controller triggers supplemental heater to warm cooling air before cooling air comes into contact with IT module(s) inside of MDC to at least one of: (i) provide cooling air above minimum operating temperature of components within IT module(s); and (ii) prevent condensation.