Controlling strategies of systems combined water source heat pump with thermal storage

The operation controlling plays a key role for realizing the advantages of water source heat pump and thermal storage in the integration systems. Using the conventional PID controlling method, parameters can not be adjusted to optimization following with real time changing operation conditions. The application of fuzzy PID method is presented for improving accuracy and precision of controlling system. The controlling models of the main equipments in the system combined the water source heat pump with the thermal storage are studied. Based on the auto-adapted fuzzy PID control theory, the system dynamic operation controlling is simulated. Taking a real building as an example, the controlling methods of fuzzy PID and conventional PID are applied separately for the two operation situations which are cooling supplied by the ice storage and cooling supplied by the chiller. It shows that the fuzzy PID control method is better than the PID control method, which has less time consumption and higher precision and less temperature fluctuation.