.TAeZoSysPro.FluidDynamics.Components.Machines.BaseClasses.PartialPump.efficiencyCharacteristic .TAeZoSysPro.FluidDynamics.Components.Machines.BaseClasses.PartialPump.efficiencyCharacteristicfunction efficiencyCharacteristic = Modelica.Fluid.Machines.BaseClasses.PumpCharacteristics.constantEfficiency(eta_nominal = 0.8);