Dynamic discharging performance of a latent heat thermal energy storage system based on a PID controller

A PID controller is introduced into a latent heat thermal energy storage unit to compose coupling system in order control the discharging performance. Outlet temperature of working fluid can be precisely regulated by means its inlet velocity variation based on controller. The theoretical model built through combining transfer with Experimental results are used validate proposed model. analysis indicates that parameters have obvious effects performance system. Kp −0.02 m/(s·K), Ki −0.15 m/(s2·K) and Kd −0.001 m/K further optimized according dynamic response transient outlet water temperature. System parameter exhibits higher target produces larger rate, which then reduces flow rate accordingly. total decrease augment Increase PCM melting point, conductivity favorable elevating velocity. improved heat. units separately obtain maximum rates 257.691, 294.437 257.603 W at 200 min for point 327.15 K, 0.8 W/(m·K) 250 J/g. It apparent conducive enhancing energy. largest respectively determined as 1280.409, 1060.105 974.153 kJ. Temperature phase change contours also substantially affected parameters. In conclusion, beneficial efficiently regulate units.