Use cases for the exceptional operation

Cooling System Equipment Failure
1. A single cooling device (e.g. air handling unit) fails.
2. Supervisory Fault Detection & Diagnostics (FDD) GC receives
- fault information data from Thermal FDD GC,
- temperature data from Thermal & Environment Monitoring GC, and
- thermal short-term prediction data from Thermal Prediction GC.
- Based on this information (unexpected increase of local temperature, faults information data from the cooling device, or a combination of both), the Supervisory FDD GC detects a deviation from normal operation and reports aggregated faults information
- to the Supervisory Intelligence GC, and
- to the Human-Machine-Interface (HMI) GC.
4. Supervisory Intelligence GC changes set points for Workload, Thermal and Power Management GCGs to adapt to the new situation with reduced cooling capacity (if such an action is required/possible) and reports actions information for the data center opera-tor to the HMI GC.
5. HMI GC issues a warning to the data center operator and, if available, provides information on how to solve the problem to the data center operator.
6. Data center operator fixes the cooling device. Cooling device is now operational again.
7. Supervisory FDD GC receives updated
- fault information data from Thermal FDD GC,
- temperature data from Thermal & Environment Monitoring GC, and
- thermal short-term prediction data from Thermal Prediction GC.
8. Based on this information, the Supervisory FDD GC concludes that the cooling system is fully operational and reports this
- to the Supervisory Intelligence GC, and
- to the HMI GC.
9. Supervisory Intelligence GC returns to normal operation (i.e. changes set points and re-ports actions information to the HMI GC).
10. HMI GC deletes the alert and returns to normal operation.

FDD Support by Thermal and Power Prediction
1. Actuation components send control signals to devices as well as to the predictions components.
2. Short-term prediction model computes theoretical future profiles of monitoring values based on control signal (theoretical process signal feedback).
3. Monitoring components send process signal feedback to Supervisory FDD GC for comparison.
4. If that comparison is out of tolerance Supervisory FDD GC sends fault information to Supervisory Intelligence GC.

 
 

Wireless Sensor Network Maintenance
1. Wireless sensor network has been deployed and is operational with the Thermal & Environment Monitoring GC providing sensor data, network statistics and device statistics to WSN Design Tool GC.
2. The WSN Design Tool GC performs fault detection and diagnosis and identifies anomalies in expected performance or behavior in the network. Based on the fault type identified, an action is recommended.
3. This fault is reported to the Supervisory FDD GC.
4. An alarm is reported to the HMI GC to inform the data center operator and, if available, provides information on how to solve the problem to the data center operator, e.g. re-place device, replace battery, …
5. Based on the alarm received the data center operator can implement the appropriate action. This action may require an update to the WSN configuration and in such cases the WSN Design Tool GC refines the deployment plan.