I have a closed area and I need to calculate the heat load for HVAC purposes.
In this system I have lots of electrical motors that move a mass back and forth on linear rails.
It's my understanding via the law of conservation of energy, that ALL energy put into this area, will turn into heat (via losses or via kinetic energy), unless it's somehow stored as potential energy inside the area, for use later on (when it still will be turned into thermal energy when converted back to kinetic).
The question is if I should assume that all energy I put into the motors measured in Watt, should be used for calculating the need for air cooling / HVAC in this space. Or do I use the efficiency of the motor output for this calculation?