ENGINEERING – PIPE FLOW & WATER UPPLY CALCULATOR
Pump System Curve
A precise tool.
What is the Pump System Curve & How does it work?
In pump system analysis the static head represents the elevation difference between the source and the discharge point, expressed in metres of water column. Friction losses arise as the fluid moves through pipe, and for turbulent flow they are proportional to the square of the discharge, allowing the system curve to be written as a quadratic function of flow. By combining the static head with the quadratic friction term we obtain the characteristic system curve, which can be plotted against the pump’s performance curve to locate the operating point.
H = H_{\text{static}} + K\,Q^{2}
H = total head (m); H_{static} = static head (m); K = friction‑loss coefficient (m·s²·m⁻⁶); Q = flow rate (m³/s)
Parameters
Result
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Frequently Asked Questions
What is static head in a pump system?
Static head represents the elevation difference between the source and discharge point, measured in metres of water column.
How do friction losses affect the system curve?
Friction losses are proportional to the square of the discharge for turbulent flow, resulting in a quadratic function of flow in the system curve.
What is the characteristic system curve in pump analysis?
The characteristic system curve combines static head with quadratic friction terms and can be plotted against flow rate.
How do you plot a system curve for a pump?
Plot the total head (static head plus friction losses) against flow rate to obtain the characteristic system curve.
What factors influence the shape of the system curve?
The shape is influenced by static head, pipe diameter, fluid viscosity, and flow velocity.
Can this calculator be used for any type of fluid?
This calculator assumes Newtonian fluids; non-Newtonian fluids may require different models.
Why is it important to consider friction losses in pump system analysis?
Friction losses reduce the efficiency of the pump and affect the overall performance of the system.
Results are for informational purposes only and do not constitute professional advice.