⚙️ Pump Power (Known Head & Flow)
Two‑column input layout • Professional color system • Light‑blue background • Bracketed inputs for visibility
Duty & Efficiencies required
m³/h
m
%
%
Process & Line Data optional
kg/m³
For Reynolds diagnostics
m/s
Typical water: 1–2 m/s
m
Used to compute discharge velocity
m
Assumptions: g = 9.81 m/s²
Formulas used (code)
// Required
Q_m3h, H_TDH, eta_p, eta_m
// Optional process
rho (kg/m^3), mu (cP or Pa·s), Vs (m/s), D_out (m)
// Convert
Q = Q_m3h / 3600
mu_Pa_s = (muUnit=='cP') ? mu*0.001 : mu
// Power
P_h = (rho * 9.81 * Q * H_TDH) / 1000
P_s = P_h / eta_p
P_in = P_s / eta_m
HP = P_in / 0.746
// Suction side (from design Vs)
A_in = Q / Vs
D_in = sqrt(4*A_in/pi)
// Discharge side
A_out = pi*D_out^2/4
v_out = Q / A_out
// Reynolds (if mu provided)
Re_in = (rho * Vs * D_in ) / mu_Pa_s
Re_out = (rho * v_out * D_out) / mu_Pa_s
