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This sort of thing will happen if you have thermostat (and humidistat) schedules that have setup/setback. The ideal loads system will recover from a change in thermostat in one timestep, which takes more power for a shorter timestep. Such an experiment would need to use constant thermostat schedules.

This sort of thing will happen if you have thermostat (and humidistat) schedules that have setup/setback. setup/setback or internal gains with "top hat" schedules that create an abrupt changes in zone loads. The ideal loads HVAC system will attempt to recover from a change in thermostat in loads over just one timestep, which takes more power for a shorter timestep. Such an experiment would need to use constant thermostat schedules. schedules and gradually ramping changes in internal gains.