Pump Power and NPSH Calculator

Calculate pump power P = ρgQH / η_pump. Verify cavitation safety using NPSH_A = P_atm/ρg + V²/2g − z − P_v/ρg ≥ NPSH_r. Typical pump efficiency 60–90%.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
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How It Works

Calculate pump power P = ρgQH / η_pump. Verify cavitation safety using NPSH_A = P_atm/ρg + V²/2g − z − P_v/ρg ≥ NPSH_r. Typical pump efficiency 60–90%

Each component has a specific meaning:

  • NPSH_A = P_atm/ρg + V²/2g − z − P_v/ρg ≥ NPSH_r — The npsh_a = p_atm/ρg + v²/2g − z − p_v/ρg ≥ npsh_r recorded for the patient or scenario being assessed.

Note: Interpret the pump power result against the clinical thresholds and context described above.

How to Use

Enter the NPSH_A = P_atm/ρg + V²/2g − z − P_v/ρg ≥ NPSH_r for the patient or scenario you are assessing. Calculate pump power P = ρgQH / η_pump. Verify cavitation safety using NPSH_A = P_atm/ρg + V²/2g − z − P_v/ρg ≥ NPSH_r. Typical pump efficiency 60–90%. Use the pump power result to inform your clinical assessment.

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Frequently Asked Questions