PI-control of dual duct systems: manual tuning and control loop interaction

摘要

Good HVAC control schemes in buildings help reduce energy use and maintain occupant comfort. To this end, PID(proportional integral derivative)controllers are widely used in commercial buildings to keep variables such as temperature and pressure, at predefined setpoints. These controllers, when they do not include an autotune feature, must be carefully tuned. Also, interactions occurring among the control loops must be considered during the first fine-tuning phase, so one loop response is not improved to the detriment of another. This study concentrates on PI(proportional integral)control of dual systems.