Application of fuzzy control technique to secondary return air systems in large spaces

Presents the application of fuzzy control technique to the secondary return air system of a symphonic concert hall. Puts forward integrated control strategies based on the project situation and designs fuzzy controllers to control fresh air dampers, secondary return air dampers and cold water valves in order to guarantee the indoor air temperature, air humidity and air quality. Using an intelligent building management system as the operation platform, realizes the optimization of set parameters in the central monitoring computer as well as the close loop control in DDC.