Centrifugal Pump Driver Sizing
INERTANCE shares the engineering calculator for centrifugal pump driver sizing (motor capacity), which is one of possible root cause for site trouble shooting works. The suitable driver sizing such as hydraulic power has to be considered during design phase, when mechanical engineer evaluates the technical bid for centrifugal pump. Driver capacity has to be mainly determined by process condition such as flow rate, head, specific gravity of pumping liquid, which information is included in pump performance curve. And, it is possible to increase the driver power as per pump efficiency, service factor as specified in API 610 11th. This engineering calculator for driver sizing includes the information with hydraulic power, brake horse power with incorporating API service factor.
How to use this calculator
- Input the flow rate in m3/hr unit for pumping liquid.
- Input total head in meter (m) unit based on process condition.
- Input the specific gravity (S.G) for pumping liquid.
- If engineer input above three (3) input data, the hydraulic power (Hyd.P, kW) can be calculated.
- Pump efficiency (%) should be input, which data can be found from pump performance curve.
- Based on pump efficiency input, the brake horse power (BHP1, kW) can be automatically calculated.
- As per para 7.1.4 of API 610 11TH, the service factor shall be considered, in case the customer’s pump is designed as per API standard.
- Then, the brake horse power (BHP2 kW) can be calculated with consideration of API service factor.
