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System Curve & Operating Point
Generate a square-law system curve from one duty point and find the new fan/pump operating point at a changed speed, or the speed needed for a target flow.
The Ensign ToolboxSystem Curve & Operating PointGenerate a square-law system curve from one duty point and find the new fan/pump operating point at a changed speed, or the speed needed for a target flow.
System duty point
m³/h
Pa
Total pressure at the duty flow
Pa
Flow-independent share of the duty pressure — 0 for a closed/friction-only circuit
Speed change
rpm
rpm
e.g. a VSD setpoint
r
Target flow
m³/h
Finds the speed this flow needs on the system curve
Enter the duty point, speeds and target flow to calculate