How to calculate pump efficiency?
The effective power of pump can be calculate according flow, head and medium. Calculate shaft power need efficiency. So how to calculate?
What is the efficiency of pump? What is the calculating formula?
Pump efficiency refers to the ratio that is the effective power of the pump and the shaft power.η=pe/p
Normal the power of pump refer to input power. The power of the prime mover to the pump shaft. Therefore is also called the shaft power."P" representative.
Effective power: the product of the flow, head and acceleration of gravity. pe=ρg qh (w) or pe=γqh/1000 (kw) ρ：liquid density(kg/m3)
γ：the weight of transport liquid. γ=ρg (n/ m3) g：acceleration of gravity(m/s)
Quality of flow: qm=ρq (t/h or kg/s)
Pump's powerN(KW)=Head(m)×Flow(m3/s)×1000(Weight of water :Kg/m3)÷102(Power conversion coefficient)÷η(Pump's efficiency)，The formula can calculate the efficiency of pump. If thecurrent and voltage can be actual measurement , according to measurement flowand head that calculate efficiency of pump.
