Normalizing energy consumption values based on degree-day temperature
Normalizing energy usage based on degree days allows more accurate comparisons for a building when analyzing data from different
times of year, such as summer versus winter. Degree day normalization may also facilitate more accurate comparisons when buildings
are located in different geographic regions that experience different weather patterns.
Prerequisites: You are working in the web UI with the AnalyticService. Historical OAT (Outside Air Temperature) data are available
in the station database and tagged with an identifiable OAT Tag.
- To view the Nav tree, click the Navigation Tree button (
). - Right-click the in the Nav tree and click .The AnalyticService Property Sheet opens.
- In the
Oat Tagproperty, enter the tag that identifies the OAT values in the database. - Expand the AnalyticService in the Nav tree and double-click the Reports node.The set of available Analytic Ux Report List View report tiles opens.
- Do one of the following:
- To create a new report, click New Report; supply a
Rep NameandDescription; selectAverage ProfileforReport Type, click OK; and click the report tile. - To edit an existing report, click its tile.
The Report Editor opens.
- To create a new report, click New Report; supply a
- Drag a component from the Nav tree to the Node window in the Report Editor.The report loads blank (no node configured) so the report does not actually render data without configuring a node.
- Configure the
Reporting Period, including the days of the week; underNormalization, click to enableDegree Day; and enter the outdoor temperature at which neither heat nor air conditioning is required to maintain a satisfactory indoor air temperature.This outside temperature value defaults to 65.00, which is a Fahrenheit temperature. - If you are using this default temperature, select
°Ffrom the temperature scale drop-down list, otherwise, enter a Celsius or Kelvin temperature value and select°C(Celsius) orK(Kelvin) from the drop-down list. - To select the type of temperature supplementation, select
HeatingorCoolingforDegree day type. - To identify the point node in the Nav tree to provide the outside air temperature values, click the plus icon to the right
of the
Degree Dayproperties.TheDegree day mappingwindow lists the Node groups configured in the report and allows mapping each group to a specific control point with the hs:outsideAirTempSensor tag.
- If necessary, edit the group and node, then click OK followed by clicking Run.
For the
Reporting Period you defined, the framework calculates the degree-day value by taking the average of the differences between the base outside
air temperature (default: 65.00) and each actual outside air temperature value. Then it calculates the energy consumption
per degree-day by dividing the energy consumption for each interval by the average degree-day value.