Application of feed-forward control to chilled water temperature optimal control of open-loop external ice melting air conditioning system

 In order to solve the problem that the chilled water supply temperature of open-loop external ice melting air conditioning system is easily affected by the outlet water temperature of the ice tank, proposes a feed-forward feedback control strategy based on energy conservation: quickly eliminates the dynamic deviation caused by the outlet water temperature disturbance of the ice tank by the feed-forward control function, and eliminates the static deviation by using the closed-loop control strategy to stabilize the chilled water supply temperature within the given value range. The application results in a large domestic airport refrigeration station show that compared with the conventional PID control strategy, the control strategy has the characteristics of small dynamic overshoot, short control process time and small steady-state deviation. At the same time, the feed-forward control function of the control strategy is simple without the transfer function model, which has better engineering adaptability and application prospect.