CENTRIFUGAL PUMP ANALYSIS

Centrifugal Pump Analysis calculates total dynamic head, power and available NPSH for a centrifugal pump, with the suction condition confirmed as liquid before any figure is produced.

Capabilities

• Total dynamic head from suction and discharge pressure.
• Hydraulic power, pump shaft power and driver input power, with pump and motor efficiency applied.
• Net positive suction head available (NPSHa), screened against a reference margin.
• Suction phase state and density reported; a gas or two-phase inlet is held with the reason stated.
• Water by preset, or any defined hydrocarbon composition.
• Exportable PDF report.

Why the results hold up

Liquid density and vapour pressure for a defined composition come from the Peng-Robinson equation of state at suction conditions; water uses the Kell (1975) density correlation and IAPWS-IF97 saturation pressure. A full phase-equilibrium check on the suction state precedes the calculation, so head and NPSH are never computed against a feed that is not liquid.

Scope

The NPSH margin is a generic screening figure, not the manufacturer’s NPSH-required curve for a specific pump at a specific speed and flow. This screening result is not a substitute for a safety-critical design review; see the Software & Engineering Disclaimer for the suite-wide statement on safety-critical use.