The formula to calculate the Total Dynamic Head is:
TDH=PH+FLH+EH
Where:
Total Dynamic Head (TDH) is the total head loss that a pump must overcome in order to move and pump water. The total head loss has three components:
Let's say you have a pressure head (PH) of 10 ft, a friction head loss (FLH) of 5 ft, and an elevation head (EH) of 15 ft. Using the formula:
TDH=10+5+15=30ft
So, the total dynamic head (TDH) would be 30 ft.