Create and Edit Valid Events for a Heat Demand

Once the network and scenario files are loaded into the active SAInt project environment, the user can create or add an event for a heat demand. Just right-click on a heat demand external object (HDEM) in the model explorer to access the context menu. Next, navigate to the "Scenario Event" entry and select the type of event of interest among the available choices, as shown in Figure 1.

A heat demand can be controlled in a scenario by several types of events. These events allow the user to specify parameters such as the desired heat output, the maximum heat output, the temperature difference, the mass flow rate, the maximum mass flow rate, and the temperature limits for an accurate heat demand management. The list of events for the heat demand is shown in table Table 1. A correct configuration of these events is crucial for a successful simulation.

Once the events are created, the user can conveniently specify the profile, settings (such as the Parameter, Value, and Unit) and time properties of each event. This can be done directly in the Property Editor, as illustrated in Figure 2 or through the scenario event table.

When editing the values for the TDSET event, it is important to ensure that the value falls within the default minimum and maximum temperature range (TMINDEF and TMAXDEF) of the heat demand object. Similarly, for the PHISET and QSET events, it is advised not to exceed the default values of PHIMAXDEF and QMAXDEF, respectively.

The heat demand in SAInt can be controlled in a scenario by several types of events, but not all events combinations are possible. There are three distinct control modes for regulating the heat demand in SAInt, which are defined based on valid combinations of events. The list of suitable configuration is provided in Table 2.

There are five combinations of heat demand events that are considered invalid and prevent the simulation from starting. For more information refer to Thermal Objects.