Pump Efficiency Curve

Calculate pump efficiency curves for viscous and non viscous flow. Viscous flow is recommended if the kinematic viscosity is greater than 20 cSt.

The efficiency curve is calculated using a three term cubic equation calculated from the best efficiency point, and the maximum flowrate:

`E = A Q + B Q^2 + C Q^3 `

where :

Q = the flowrate
A, B and C are constants

The efficiency is assumed to be zero at shut-in. The maximum efficiency occurs at the best efficiency point.

PLEASE NOTE : The pump calculators are currently being updated. Apologies for any inconvenience.

Change Module :

• Pump Affinity Or Similarity Law Scaling Calculation Module
• Pump And Piping System Curve Calculation Module
• Pump Best Efficiency Point (BEP) Scaling Calculation Module
• Pump Cavitation And NPSH Calculation Module
• Pump Delta Pressure Versus Flowrate Curve Calculation Module
• Pump Delta Temperature Calculation Module
• Pump Flowrate Pressure And Power Coefficient Calculation Module
• Pump Hydraulic And Input Power Calculation Module
• Pump Liquid Vapour Pressure Viscosity And Density Calculation Module
• Pump Minor Loss Factor Calculation Module
• Pump Specific Speed Calculation Module
• Pump Variable Frequency Drive (VFD) Design Speed Calculation Module
• Pump Viscosity Correction Calculation Module
• All

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