One possibility to set a target temperature in the cabin is to control the RPM of the blower (fan).
This example demonstrates how a subsystem including several calculation controllers can easily be added to an existing HVAC simulation system.
By adjusting the fan RPM, the cool down (heat up) performance of the cabin is influenced. This controlling strategy is included in a subsystem which mainly consists of calculation controllers.
As a necessary input, the user has to define a required cabin temperature and the upper and lower limit for the fan RPM. The calibration coefficient is a kind of RPM offset for the controller, used in each simulation time step.
If the average cabin temperature exceeds the upper temperature limit plus the temperature tolerance, the max. fan RPM is used.
In all other cases the fan RPM is reduced or increased by the calibration coefficient. Due to the change of the fan RPM in each simulation time step, a smooth control characteristic is created.Usable from release: KULI 9.1-0.01