Water Horsepower Total Head Formula |
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\( h_t \;=\; \dfrac{ WHP \cdot 3960 }{Q }\) (Water Horsepower Total Head) \( WHP \;=\; \dfrac{ Q \cdot h_t }{3960 }\) \( Q \;=\; \dfrac{ WHP \cdot 3960 }{h_t }\) |
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| Units | English | Metric |
| \( h_t \) = Total Head | \(ft\) | |
| \( WHP \) = Water Horsepower | \(lbf-ft\;/\;sec\) | - |
| \(Q \) = Discharge Flow Rate | \(ft^3\;/\;sec\) | - |
Water horsepower total head is the total energy required by a pump to move water through a system, accounting for all factors that contribute to the resistance or head the pump must overcome. Total head is a measure of the total height, pressure, and friction losses that the water must be lifted or pushed against, typically expressed in feet or meters. It includes static head (the vertical distance the water is lifted from the suction point to the discharge point), pressure head (the pressure difference required at the discharge point, such as in a pressurized system), and friction head (the energy lost due to water flowing through pipes, fittings, and other system components). Water horsepower is the power required to move a specific volume of water against this total head, total head is in feet, and specific gravity accounts for the fluid's density relative to water. This metric is critical in power selection and system design, ensuring the pump can deliver the necessary power to meet the system's demands efficiently.
- See Article - Horsepower Conversion
