Determine if there is no noticeable decrease in electrical load during unoccupied hours
Applicable Systems
- All meters
Description / Method
Compares electrical consumption during occupied and unoccupied hours, and generates an insight if consumption during unoccupied hours over the week is not less than 50% of consumption during occupied hours.
Logic
Normalize all inputs to 5-minute samples. Over the week, separate consumption based on occupancy. Sum the occupied consumption. Sum the unoccupied consumption. Generate an insight when there is not enough reduction for unoccupied times.
Over week interval{
if building occupied then sumOccupied
if building unOccupied then sumUnOccupied
}
If ( sumUnOccupied > sumOccupied* % reduction, insight,no_insight)
Diagnosis / Recommended Action
- Check if there are equipment in manual.
- Review and optimize sequence to include occupancy based control.
Message
Electrical consumption has not reduced during unoccupied hours. Please review equipment control.
Notes
All time spans and thresholds are adjustable.
Please note that this rule waits until the last day of the week before it generates the insight. This is done by using the Date Part block [block #15] – the sum of all days of the week is 21 and this condition is checked in the trigger block (Multiple Expression block 12).Default Values for Constants
- Weekly Threshold: 50%
Rule Template Type
- Insight Type: Energy
- Trigger Type: Active High
Default Priority
- High
Inputs
| Inputs | Units | Tags | Description |
|---|---|---|---|
| Electrical Consumption | kWh,GJ,BTU | energy, meter | Equipment On/Off Indicator |
| Occupancy | 0/1 | occupied,schedule | Actual temperature of water leaving the chiller |
Constants
| Inputs | Units | Default Value | Description |
|---|---|---|---|
| Weekly Threshold | % | 50 | Expected reduction in consumption during unoccupied times |