How to calculate the power consumption of a pump
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The pump has now been shut down. What data is needed to calculate its previous power consumption?
P = k * ρ * Q * (H + ΔH) / 102 * η * ηc. Here, P represents the motor power in KW; the value of K is 1. ρ is the density of the liquid in T/m3, Q is the outlet flow rate of the pump in m3/s, H is the head pressure in meters, ΔH represents the head loss in meters, η is the efficiency of the pump (as indicated on the pump’s label), and ηc is another efficiency factor
You just need to provide the operating current and operating time, then consult an electrical specialist; based on the motor power factor corresponding to the load current, as well as the motor’s wiring method and system voltage, the calculation can be completed in two or three minutes
The pump’s nameplate indicates the motor power.