How to calculate the size of a motor pump?
How to calculate the size of a motor pump?
Pump Hydraulic Power (ph) = (1000 x 0.005 x 65 x9.87)/1000 =3KW Motor/ Pump Shaft Power (ps)= ph / pe = 3 / 80% = 4KW Required Motor Size: ps / me =4 / 90% = 4.5 KW Required Size of Motor Pump = 4.5 HP or 6 HP
What is the sizing of a rotodynamic pump?
Pump sizing, then, is the specification of the required outlet pressure of a rotodynamic pump (whose output flow varies nonlinearly with pressure) with a given system head (which varies nonlinearly with flow).
What do you need to know about pump sizing?
Pump sizing. Pump sizing involves matching the flow and pressure rating of a pump with the flowrate and pressure required for the process. The mass flowrate of the system is established on the process flow diagram by the mass balance.
How are motor and Pump efficiencies determined when choosing a pump?
When choosing a pumping system, determining motor and pump efficiencies is an important preliminary step. But when calculating the final system cost, users must include both the capital expenditure and the energy cost of the system. In many cases, the most efficient system may not be the most cost-effective system.
How big of a motor do I need for a centrifugal pump?
The power required to drive the pump at the rated design condition should always be less than the nameplate horsepower rating of the motor. So if the pump will require 4.5 HP at the design condition, at a minimum, the motor should be sized for 5 HP – the next nominal size above 4.5 HP.
How to determine the right size for a hydraulic pump motor?
This two-part post explains how to determine the best size for a hydraulic pump motor and how to scale the size and cost with RMS loading and Hp limiting. Knowing how to right-size an electric motor for your hydraulic pump can help reduce energy consumption and increase operational efficiency.
How much torque does a two stage pump have?
A gas or diesel engine only has about a 10-15% torque rise from full load to max torque. So it seems like the electric has more lugging torque, which it does. Two stage pump is say 11 gpm to the maximum pressure the engine can turn until the large gear section unloads, say 600 or 900 or 1000 psi. That is one torque and hp point.
How big of a motor do I need for my 11gpm?
Your 11gpm @ 3000psi should take a 21hp electric motor. It is recommended that you double that number for a gas engine. While that might be true, I have never found it to be so.
