Efficiencies Tab

The Efficiencies Tab is used to view and edit end-use and technology efficiency data. The data values are annual and provide a positive measure of efficiency (a larger value means higher efficiency and lower energy use). The units of measurement are not important since the model equations index the annual values to 1.0 in the base year. The values should represent the stock average efficiency for each end use. For example, for Central Air Conditioning, these values could be average seasonal energy efficiency ratios (SEER). For lighting, they could be average lumen per watt values. For water heaters, they could be average Energy Factor (EF) values. For some end uses, where efficiency is not an issue, they could be a column of 1.0 values.

The Efficiencies Tab contains a standard list grid, with expansion controls [+] and [-] for each row. When a row is not expanded, there is one line for each set of efficiency data, and that line shows the name of the set (End-Use Efficiency ID), the Description field, and a set of Custom fields that can be used to sort and filter the list.

The toolbar on the Efficiencies Tab allows the user to Add, Delete, and Duplicate efficiency data sets. Additional controls are available to Filter the list or to change the column order. Rows can also be added or modified through the Import Wizard, using:

  • Tools > Import > Long Term SAE End Use > Efficiency List

When a row is expanded by hitting the [+] button for that row, an embedded list is shown that contains the data for the selected row. The embedded list has one group of rows for each end use and technology in the system, with one row for each annual value in the database. The embedded list contains the following fields:

  • EndUseKey. The name of the end use.
  • Year. The year for the efficiency value.
  • Efficiency. The efficiency value for the end use and year.

The embedded list has standard functionality to drag a column into the Group-By bar and to then use the bar to filter the data, for example by selected end use or by selected year.

While the embedded data list can be used to edit data, this must be done one row at a time. Also, new rows can be added using the Add Contributor button on the toolbar. This will add a new row to the bottom of the list with the name of the end use that is selected and with the year after the last year of data for that end use. Although this functionality is available through the UI, it is typically easiest to modify or extend the data through the Import Wizard, using:

  • Tools > Import > Long Term SAE End Use > Efficiency Data