Determining the total dynamic head (TDH) involves calculating the total vertical lift, accounting for friction losses within the piping system, and considering pressure differences between the source and destination. For example, a system lifting water 50 feet vertically, with 10 feet of friction loss and needing to deliver at 5 PSI higher pressure than the source would have a TDH of approximately 61.7 feet (50 + 10 + 1.7). This calculation provides a crucial metric for selecting a pump capable of meeting the system’s specific demands.
Accurate TDH calculations are essential for optimal pump selection and system efficiency. Choosing a pump with insufficient TDH results in inadequate flow and pressure, while an oversized pump wastes energy and resources. Historically, these calculations were performed manually using charts and formulas; modern software and online tools now simplify the process. Proper application of this principle avoids costly errors and ensures long-term system reliability.