| Product(s): | WaterGEMS, SewerCAD, WaterCAD, SewerGEMS, CivilStorm |
| Version(s): | CONNECT Edition, V8i |
| Area: | Calculations |
Problem
How can I find the Total Dynamic Head (TDH) of one or more pumps?
Solution
The Total Dynamic Head is basically just the pump head - the head that the pump adds which overcomes both the "static head" (or sometimes referred to as "static lift" - the difference in upstream/downstream boundary conditions) as well as the "dynamic head" which is the headlosses in the pipes between. The higher the flow, the more the friction losses and the higher the head the pump needs to add. This relationship is illustrated by the system head curve.
If you are looking for just the dynamic portion, you would have to find the difference in elevation between the upstream and downstream boundaries (wet well, outfall, etc.), then subtract that from the total pump head. Again this would be the portion of the pump head to overcome friction losses, but the "total dynamic head" includes the "static lift".
See Also
Understanding System Head Curves in WaterGEMS, WaterCAD, and SewerCAD
System head curve changing depending on status of other pumps