VSP Controlled by Discharge Side Tank
The improvement allows users to choose a tank at the downstream side of a pump as the control target. Once a user selects a tank as the control node for a VSP, the control target head is set to the initial tank head by default. The VSP algorithm will calculate the required relative pump speed to maintain the tank level. If the tank level drops below the target level, the VSP will be forced to increase the speed, up to the maximum allowable speed as specified, to meet the target tank level. If the tank level is greater than the target level, the VSP speed will be reduced or shut off to permit the tank supply system demand and thus the tank level can be gradually lowered to the target level.
To set up a discharge side tank as the VSP control node:
- Click on a VSP or VPSB.
- In the Properties editor, set the attribute Is Variable Speed pump? to True.
- Set VSP Type as Fixed Head.
- Choose a desired discharge side tank as Control Node.
- Specify the maximum relative speed factor and set Is Suction Side Variable Speed Pump to False.