Optimal control of air handling units based on actual characteristics of control valves

Obtains the actual opening-relative flow characteristics of the control valve of an air handling unit through measurement. Using the established air handling unit simulation platform, simulates and studies the control effect of the control parameters based on the theoretical working characteristics curve on the actual control valve. The results show that the flow rate variation due to the unit opening change of the control valve in the actual operation is larger than that under the ideal flow characteristics, which leads to the overshoot of the control valve opening and the fluctuation of room temperature, and the control effect deviating from the expected ideal effect. Based on the actual flow characteristics of the control valve, proposes to optimize the control effect by reducing PI control parameters, and verifies the effectiveness of the optimization method by experiments.