Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The shaft power (impeller) winds up a heat to the fluid. If you have specified a motor heat to fluid fraction greater than 0, additional motor heat will be added to the fluid proportional to that fraction.
! This adds the pump heat based on User input for the pump
! We assume that all of the heat ends up in the fluid eventually since this is a closed loop
ShaftPower = Power * PumpEquip(PumpNum)%MotorEffic
PumpHeattoFluid = ShaftPower + (Power - ShaftPower)*PumpEquip(PumpNum)%FracMotorLossToFluid
So there are 2 fluid heating components. One is imparted by the impeller to increase fluid pressure, the other is the motor electrical losses that may or may not heat the fluid.
| | 2 | No.2 Revision |
The shaft power (impeller) winds up a as heat to the fluid. If you have specified a motor heat to fluid fraction greater than 0, additional motor heat will be added to the fluid proportional to that fraction.
! This adds the pump heat based on User input for the pump
! We assume that all of the heat ends up in the fluid eventually since this is a closed loop
ShaftPower = Power * PumpEquip(PumpNum)%MotorEffic
PumpHeattoFluid = ShaftPower + (Power - ShaftPower)*PumpEquip(PumpNum)%FracMotorLossToFluid
So there are 2 fluid heating components. One is imparted by the impeller to increase fluid pressure, the other is the motor electrical losses that may or may not heat the fluid.
