PUMP MOTOR SIZE DUE TO FLUID TEMPERATURE OF ABOVE 40 DEG C
PUMP MOTOR SIZE DUE TO FLUID TEMPERATURE OF ABOVE 40 DEG C
(OP)
Can someone explain the effect of fluid temperature to the motor size.
Mostly, Vendor provided to size of motor at 40 deg C to be 112kW (150hp).
However, as per our client the fluid temperature shall be used is 60 deg C. Again, the pump vendor have size the motor to 160kW (200hp).
My question are?
Is their an derating factor that if the fluid is above the normal temperature the pump motor also increase the kW (hp)?
What is the reference or table to this derating factor as per standard?
Mostly, Vendor provided to size of motor at 40 deg C to be 112kW (150hp).
However, as per our client the fluid temperature shall be used is 60 deg C. Again, the pump vendor have size the motor to 160kW (200hp).
My question are?
Is their an derating factor that if the fluid is above the normal temperature the pump motor also increase the kW (hp)?
What is the reference or table to this derating factor as per standard?





RE: PUMP MOTOR SIZE DUE TO FLUID TEMPERATURE OF ABOVE 40 DEG C
Increasing temperature also decreases viscosity, which again decreases BHP drawn bu the pump (for a fixed system and speed).
Neither of above suggests a reason to increases BHP with speed.
Maybe the motor is in somewhat intimate contact with the fluid and the client specifies higher motor rating as means to compensate for the higher temperature. That would be an indirect way of doing it but you never know. All I can do is swag guess. Maybe someone else has better ideas.
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(2B)+(2B)' ?
RE: PUMP MOTOR SIZE DUE TO FLUID TEMPERATURE OF ABOVE 40 DEG C
should've been
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(2B)+(2B)' ?
RE: PUMP MOTOR SIZE DUE TO FLUID TEMPERATURE OF ABOVE 40 DEG C
It doesn't sound like a power-demand-related issue, but it could very well be a reserve-cooling-capacity issue.
RE: PUMP MOTOR SIZE DUE TO FLUID TEMPERATURE OF ABOVE 40 DEG C
The vendor calculated at fluid temp at 40degC, the selected motor rating is 112kW (150hp).However, when he changed the fluid temp to 60degC, the selected motor is 160kW (200hp).
RE: PUMP MOTOR SIZE DUE TO FLUID TEMPERATURE OF ABOVE 40 DEG C