Pumps - Energy Calculator

Calcular bombas hidráulicas e potência do eixo.

Hydraulic Pump Power

The ideal hydraulic power to drive a pump depends on

  • the mass flow
  • liquid density
  • at differential height

– ou é a elevação estática de uma altura para outra ou o componente de perda de carga total do sistema – e pode ser calculado como

P h(kW) = q ρ gh / (3,6 10 6 )

= qp / (3,6 10 6 ) (1)

Where

P h(kW) = potência hidráulica (kW)

q = fluxo (m 3 /h)

ρ = densidade do fluido (kg/m 3 )

g = acceleration due to gravity (9.81 m/s 2 )

h = carga diferencial (m)

p = pressão diferencial (N/m 2 , Pa)

A potência hidráulica do cavalo pode ser calculada como:

P h(hp) = P h(kW) / 0,746 (2)

Where

P h(hp) = potência hidráulica (hp)

or alternatively

P h(hp) = q gpm h ft SG / (3960 the ) (2b)

Where

q gpm = fluxo (gpm)

h ft = altura differential (ft)

SG = Gravidade Específica (1 para água)

η = pump efficiency

Exemplo – Bombeamento de Água

1 m 3 /h of water is pumped to a head of 10 m . The theoretical power of the pump can be calculated as

P h(kW) = ( 1 m 3 /h ) (1000 kg/m 3 ) (9,81 m/s 2 ) (10 m) / (3,6 10 6 )

= 0,027 kW

Axle Pump Power

Shaft power – the required power transferred from the motor to the pump shaft – depends on the efficiency of the pump and can be calculated as

P s(kW) = P h(kW) / h (3)

Where

P s(kW) = shaft power (kW)

η = pump efficiency

Source: https://www.engineeringtoolbox.com/pumps-power-d_505.html

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