Cálculo do NPSH disponível
Available NPSH

Input data

Temperature

Flow

Diameter (Ds)

Diameter (Db)

Length (L1)

Length (L2)

Level (EL.s)

Level (EL.b)

Roughness

Output data

NPSH

Description

Calculates the available NPSH (Net Positive Suction Head) of a pump. Given the water temperature, flow rate, suction pipe characteristics, and the elevations of the sump water level and the impeller axis, this calculation determines the available NPSH.

NPSH

Input and output parameters table:

ParameterStandard UnitsDescription
Temperature (TT)°CWater temperature
Flow (QQ)L/sWater flow rate
Diameter (DsD_s)mmSuction pipe diameter
Diameter (DbD_b)mmDischarge pipe diameter
Length (L1L_1)mSuction pipe length
Length (L2L_2)mDischarge pipe length
Level (ELsEL_s)mSump water level
Level (ELbEL_b)mImpeller axis level
Roughness (kk)mmPipe roughness
Available NPSHmCalculated available NPSH

References

  • VIANNA, Marcos Rocha. Produção, Reservação e Distribuição de Água. e-book. Belo Horizonte: Bloom, 2021.