Optimisation Objective

Accessed from Optimisation Analysis Settings dialog

Name

Your name for the objective, e.g. "Minimise ASHRAE 55 discomfort hours"

Objective KPI

Select the Objective Key Performance Indicator (KPI) from the list:

• 1-Cost - total construction cost as reported on the Cost and Carbon tab.
• 2-Operational carbon - annual operational carbon emissions due to fuel consumption in the building. Fuel consumption is calculated through an EnergyPlus simulation. Carbon emissions are calculated from fuel consumption using the Carbon emission factors on the Legislative regions dialog.
• 3-Discomfort hours - number of discomfort hours based on ASHRAE 55 method. Area-weighted average values for individual zones are used for the building level assessment. Note that this objective is not the same as the building level aggregation method used by EnergyPlus in the Summary output html data which adds up hours in which any zone in the building is uncomfortable. If you would like to only consider occupied hours in your comfort analysis then make sure this option is set in the main Simulation options dialog.
• 4-Daylight availability - % of the building working plane having natural daylight levels higher than the threshold defined on the Daylight screen (2% daylight factor by default).

Note: The 4-Daylight availability objective is not available in current versions.

Minimise or Maximise

Select whether you wish to maximise or minimise the selected objective.