Data Center Cooling Unit Fan Speed Override for Power Limiting
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Solution Overview
Problem
Data centers face electrical bus overload due to collective power draw from multiple air cooling units, which can lead to reliability and efficiency issues in maintaining optimal temperature and humidity control.
Innovation Solution
Implementing an active power limiting sequence by a unit controller that overrides the fan speed set-point of air cooling units to reduce power draw within a bounded range, preventing electrical bus overload and allowing for redundant cooling units on a shared electrical bus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple air cooling units operate at full capacity on a shared electrical bus, then cooling capacity and temperature control are improved, but electrical bus overload occurs
Solution Approach 1:
The system dynamically adjusts fan speed setpoints based on real-time power consumption data and electrical bus conditions. The unit controller continuously monitors power usage and modifies operating parameters to maintain temperature control while preventing electrical bus overload, transforming a static operating mode into a dynamic adaptive system.
Solution Approach 2:
The patent changes the fan speed parameter to control power consumption. By adjusting the fan speed setpoint below the originally programmed value, the system reduces the refrigeration load on the air cooling component, thereby controlling overall power draw to prevent electrical bus overload while maintaining adequate temperature control.
2Power
If fan speed set-point is reduced to limit power draw, then power consumption is controlled within bounded range, but cooling capacity may be compromised
Solution Approach 1:
The unit controller implements a feedback mechanism that continuously monitors power consumption and adjusts fan speed setpoints accordingly. The system receives power consumption data, compares it against bounded range thresholds, and dynamically modifies fan operating parameters to maintain power draw within acceptable limits while preserving temperature control through adaptive adjustment.
3Reliability
If redundant cooling units are deployed on a shared electrical bus, then reliability is improved, but electrical bus overload risk increases
Solution Approach 1:
The system employs partial action by operating cooling units at reduced fan speed setpoints rather than full capacity. This allows multiple redundant units to be deployed on the electrical bus without causing overload, as each unit operates at a controlled power level that collectively maintains reliability while staying within electrical bus capacity limits.
Data Source
AI summary
In general, techniques are described for overriding a programmed set-point of an air moving component of a cooling unit, in order to control an extent of a refrigeration load on an air cooling component of the cooling unit. In one example, an air cooling unit that is configured to be coupled to an electrical bus of a data center includes an air cooling component, an air moving component that is configured to supply air to the air cooling component at a volumetric flow rate according to a fan speed set-point of the air moving component, and a unit controller that is configured to adjust the fan speed set-point of the air moving component to limit power draw by the air cooling unit from the electrical bus to within a bounded range of values that is defined in part by a power draw set-point of the air cooling unit.