Heat load from pump motors
Heat load from pump motors
(OP)
I have two 125 hp motors in a room that pump water outside the room to a clearwell. I want to know how much heat is dissipated to the room to size exhaust fans.
After reading the recent thread about heat from conveyor motors (403-174079) it seems that the heat load to the room would be 785,494 BTUH assuming the pump and motor are each 90% efficient.
But that means all energy is converted to heat. In this case, should I just consider the losses from the inefficiencies of the pumps and motors as heat added to the room?
After reading the recent thread about heat from conveyor motors (403-174079) it seems that the heat load to the room would be 785,494 BTUH assuming the pump and motor are each 90% efficient.
But that means all energy is converted to heat. In this case, should I just consider the losses from the inefficiencies of the pumps and motors as heat added to the room?





RE: Heat load from pump motors
Don't worry about the 'work put into the pumped fluid'
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: Heat load from pump motors
RE: Heat load from pump motors
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: Heat load from pump motors
RE: Heat load from pump motors
Unless you have a designed cooling loop on the pump, or fluid is hot enough to yield significant radiant heat, its the motor heat load that is of concern, which as marcoh indicates, represents the inefficiency of the motor...For (2)- 125's at 90% nominal efficiency, that comes out about 63,000 BTUH.
And considerably less if the pump only draws, say, 85 Hp steady state....