I use the old sensible heat gain equation btu = 1.08 x cfm x delta T. I'm not sure what the SI version is, but it's used the same.
Use ASHRAE's heat gain for motor driven equipment, with motor and equipment in the air stream. Add up all the motor heat gains, along with any heat gain from...
First, I think your heat gain from the motors is low. ASHRAE has a guideline for this, and a 20hp pump with both motor and pump in the same space releases 58,500 btu/hr. If both pumps are running, that's 117,000 btu/hr.
The air temperature rise = btu/hr divided by 1.08 x cfm.
If both pumps...
