The simulated performance of the combined feedforward-feedback controller is compared to the performance of the feedback only (proportional-integral) approach for temperature control during heating. The heating sequence occurs due to a high room ventilation load caused by the fume hood openings. Local heating is provided by reheat coils. The simulated results show that the combined controller provides stable and accurate control under different operating conditions. The feedback controller only performs better than the combined controller at the operating condition for which it was tuned.

Units: Dual