Schedules are used throughout load and energy modeling tools. Each schedule defines when what is being defined occurs in the simulation. For example if a building will have 45 people, a schedule will define that 50% arrive at 8am and then at 10am 100% are in the building. Finally at 6pm the schedule will define that everyone has left for the day by setting the percentage to 0. In similar fashion schedules help control many inputs in a building analysis model including lighting, equipment, set points, water flow temperatures and much more.
Schedule interface guide (right click image, open in new tab to enlarge)
Each schedule on the platform includes three components: Winter Design Day, Summer Design Day, and the operational days.
Winter Design Day is used sizing the heating components of the model. Typically this day is set to 0% for internal gains as this will produce the worst case situation for sizing of heating coils etc.
Summer Design Day is used for sizing cooling components of the model. Typically this day is set to 100% (saturated) for internal gains as this will produce the worst case situation for sizing of cooling coils etc.
The Operational Days are the actually intended schedule for the building. These will be variable based on when the building opens, what controls schemes are being implemented etc. Operational Days include a Default Day which is assigned to all days, unless an additional day type is added. The additional Custom Days can be assigned by day, and allowing detailed yearly schedules to be created. Use selection buttons below each Custom Day to define the days and month it will be applied to. In the example below the Custom Day is applied to every Sunday and Saturday, January to December.
Types of Schedules
To help organize the many schedules required for any given project each schedule is assigned a type. Schedules are only assignable to loads, setpoints etc. based on the type.
Lighting - Fractional. Assignable to any lighting load
People - Fractional. Assignable to any occupant load
Equipment - Fractional. Assignable to any gas or electric equipment load
Temperature - Absolute: F or C. Assignable to any setpoint
Other - Fractional. Used for system specific parameters
Activity - Absolute: Btu/h per person or W per person. Assignable to people activity rate inputs
Schedules can be edited by adjusting the sliders. Simply select the slider and type in the desired numeric value to quickly and accurate update.