Hello Dina, PDD and DDA as you know both work on different principles, in PDD demand is based on pressure, so if there is adequate pressure available then only total demand will be satisfied. You should prepare two scenarios here, one for DDA and another for PDD and use same pump curve. Using Pressure Dependent Demands However the user notifications about pump not able to deliver flow implies that more flow is required than the pump capacity, so pump is delivering flow more than its design point. How to correct this is explained in below wiki, kindly go through it. User notification "Pump exceeds the maximum operating point specified for the pump curve" User Notification "Pump cannot deliver flow or head" You can also generate system head curve to understand how pump is working for give curve. Understanding System Head Curves in WaterGEMS, WaterCAD, and SewerCAD If this doesn't help you, then you may upload model files for our review. Sharing model files
↧