d´un tube droit   

Perte de charge

d´un tube droit


Calculation of Pressure loss:
  1. Enter volume flow.
  2. Enter density and dynamic viscosity.
  3. Enter inner diameter and pipe walls roughness.
  4. Enter pipe length.
Pressure loss will be calculated for constant density. Pressure loss decreases quadratically with the diameter. Doubling the diameter will drop pressure loss by 75%. Calculation distinguishes between laminar flow (Re < 2320) und turbulent flow (Re > 2320). Since laminar flow can be observed up to Re=8000 pressure loss may be overestimated in the transition zone.

Perte de charge [bar/10m]
Valeurs pour l´eau á température ambiante
(1000 kg/m³, 1 mPas, k=0.1 mm)
5 m³/h 10 m³/h 20 m³/h 40 m³/h
DN25 (d=28mm) 0.264 1.018 4.07 16.28
DN50 (d=55mm) 0.009 0.032 0.119 0.477
DN100 (d=108mm) < 0.001 0.001 0.004 0.014

Base du calcul Tube d'acier Tube en plastique
Installation
Fluide Température ºC
Débit volumétrique* m³/h
Densité* kg/m³ Viscosité Dyn. (Newton) mPas
Diamètre Intérieur  d * mm Rugosité  k * mm
Longueur de tuyau* m




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