Velocity-Based Power Capping for Mobile Data Center Ram Air Cooling
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Solution Overview
Problem
Mobile data centers face challenges in power capping due to the high power consumption of air handling units (AHUs) for cooling, especially in scenarios where power is limited, such as in mobile data centers powered by generators or batteries, and existing cooling methods are inefficient in varying velocity conditions.
Innovation Solution
A method for implementing power capping in velocity-cooled mobile data centers by detecting velocity and adjusting power allocation based on outside air cooling thresholds, utilizing ram air cooling to reduce power consumption, and transitioning between different cooling modes to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air handling units (AHUs) are used for cooling IT equipment in mobile data centers, then cooling effectiveness is improved, but power consumption increases significantly
Solution Approach 1:
The mobile data center utilizes the motion of the vehicle itself to generate cooling airflow through ram air effect. The vehicle's forward movement forces ambient air into the data center enclosure, providing passive cooling without requiring active cooling systems to be fully operational. This self-service approach converts the vehicle's kinetic energy directly into cooling airflow.
Solution Approach 2:
The cooling system dynamically adjusts between two modes based on vehicle velocity: at low velocities, AHUs provide active cooling; at high velocities, ram air cooling takes over. The system transitions between these modes optimally, with dampers adjusting airflow paths and AHUs modulating their speed to match cooling demands based on real-time velocity conditions.
2Use of energy by moving object
If power capping is applied to conserve onboard power, then power availability for IT equipment is improved, but cooling capacity may be insufficient
Solution Approach 1:
The system continuously monitors vehicle velocity and uses this feedback to dynamically adjust power capping levels. When velocity exceeds the threshold, the system detects that sufficient ram air cooling is available and increases the power cap for IT equipment. When velocity drops below the threshold, the system reduces the power cap to ensure AHUs have enough power to maintain cooling capacity.
Solution Approach 2:
The power cap parameter is dynamically changed based on vehicle velocity conditions. The system adjusts the maximum power allocation for IT equipment from a lower cap (when cooling is critical) to a higher cap (when passive cooling is sufficient), thereby optimizing the balance between computing workload and thermal management.
3Use of energy by moving object
If velocity-based power capping is implemented, then onboard power conservation is improved, but system complexity increases
Solution Approach 1:
The control system is segmented into distinct functional modules: velocity sensing module, threshold comparison module, power cap determination module, and execution module. Each module performs a specific function, making the overall system easier to implement, debug, and maintain despite the dynamic behavior.
Solution Approach 2:
The system introduces an intermediary control layer between the velocity sensor and the power management system. This intermediary layer (the power cap determination logic) translates raw velocity data into actionable power allocation decisions, simplifying the control architecture and enabling modular implementation.
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 approach effectively conserves onboard power by leveraging ram air cooling and adjusting power allocation dynamically, ensuring efficient heat removal and data processing even in limited power conditions, while minimizing the reliance on power-intensive AHUs.
Implementation Method 1
a flow of outside cooling air is generated from a velocity of movement of the VC MDC and/or a velocity of the transport vehicle
Data Source
AI summary
A method for implementing power capping in a velocity cooled (VC) mobile data center (MDC). A management information handling system (IHS) applies a power cap for all power consuming components of the VC MDC based, in part, on the detected velocity of the VC MDC. The detected velocity is compared to an outside air cooling threshold velocity. In response to the detected velocity being below the outside air cooling threshold velocity, a first power cap is selected, based on the detected velocity being below the outside air cooling threshold velocity. In response to the detected velocity being at or above the outside air cooling threshold velocity, a second, higher, power cap is selected, based in part on the detected velocity being at or above the outside air cooling threshold velocity. Power capping is implemented to conserve available onboard power for IT equipment processing, based on availability of ram air cooling.