If modeling a Controlled Pump (Variable Speed) or a Positive Displacement Pump with a steady setpoint, users can define a transient setpoint vs time profile. This replaces the Speed vs. Time option, as defining both the speed and the setpoint would over constrain the system.

Transient Data

The Setpoint vs. Time data must be directly defined in Transient Data. The selected parameter will be forced to meet this data at each time step of the transient simulation, with the pump curves being adjusted every time step following the affinity laws. The resulting speed variation over time will be visible in the output.