Pump BkW 1

[NickParker]

The pump performance datasheet is attached below. I'm not sure which is the Pump BkW (The Power which pump requires from the Motor).

I'm asking this because, as I want to reduce the loads in the "Load List" so that I can optimize the transformer rating. I have several pumps from the same manufacturer, so considering the correct BkW will considerably reduce the total loads.

Asked this to the pump vendor, but it seems it would take some time to receive the reply, hence asking here.

 

[RVAmeche]

Is this an existing pump in an existing service or a budget/preliminary sizing for a project still in development?

If the latter, I would hesitate against "optimizing" the pump load when the impeller may need to be upsized in the future based off process needs.

 

[NickParker]

Hi RVAmeche,
Its for a project still in development.

 

[LittleInch]

It's about 79kW shaft power or B(Kw) as you seem to call it. Or Power rated as they call it. (81.3 kW). I don't know if that's motor output or power into the motor as most motors are >95% efficient at that sort of size.

This pump is pretty close to it's maximum, but if you flow more then the power will increase. Plus you have start-up loads.

It's also not wildly efficient so the hydraulic power is what the pump puts out, but then it's only 64% efficient at your flow rate, so needs ~79kW at the shaft. Maybe buy a more efficient pump instead? You should be able to get 75% or more at that sort of size.

Do you need any more?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[pierreick]

Hi,

P=Q*Ro*g*H/Efficiency

in your case : Q=111/3600 m3/s; g=9.81 m/s2;Ro =1000 kg/m3 ; H= 165.3 m and efficiency =64.0%

P shaft = 78.123 KW which is close to Power rated 81.3 Kw , 96% motor efficiency seems realistic .


Pierre