Understanding Energy Usage Graphs

Pelican gives you the ability to view historical energy consumption, so you can pinpoint your building’s energy usage and compare your building operations over time.

Reporting Options

The Reporting Options on the left hand side of the graph allow you to filter what is being displayed.

  • Device List

Device selection: All of the active HVAC units are listed. Placing a check next to any device will include that device in the list.

Color selection: The user can select different colors for each device. This will display stacked bars of different colors in the graph.

  • Display

Time: This option sets the unit of measure to “run time” in hours and minutes.
Color selection: This option sets the unit of measure to “power consumption”. The Cooling Usage Graphs will display kilowatt hours. If the installed HVAC units use electric heat (heat pump or electric coil) the unit of measure for Heat Usage will be in kilowatt hours, otherwise the unit of measure will be in therms. 
Cost: This option sets the unit of measure to “dollars”.

  • Resolution

Hour: Displays a single day’s usage in 15 minute increments.

Days: Displays daily usage for a single month.

Months: Displays monthly usage for a single year.

  • Show

Day/Night: Usage can be filtered to show only the Day time usage, the Night time usage or both Day and Night usage.

Day Start: When filtering for Day/Night usage, the time to use for the start of the day can be set.

Night Start: When filtering for Day/Night usage, the time to use for the start of the night can be set.

Energy Calculations

Our system automatically calculates both power consumption and cost, based on actual run time data and system configuration data.

  • Power Usage

Power usage is based on the measured run time multiplied by the user configured rate of consumption.

For electrical consumption the formula is:

kWh = kW x h

where:

kWh = kilowatt hours
kW = (kilowatts) = Volts x Amperes x Power Factor
                                                         1000
h = hours