To improve the efficiency of a heating, ventilating and air conditioning fluid distributing system by a method wherein a feedfoward control system, generating a control signal based on the control set value and discriminating characteristic of the system, is provided and the set value is regulated based on the reference of discriminating characteristic and a measured change.
A controller is provided with a temperature control loop 10 for heating, a pressure control loop 12, and a temperature control loop 14 for cooling while respective control loops 10-14 are equipped with a feedfoward block 22 and/or a feedfoward block 24. Further the control loops 10-14 are provided with a supply damper/actuator block 30, including the supply damper and an actuator related to air supplying ducts for rooms to be controlled. In this case, respective control loops 10-14 produce a feedfoward control signal based on flow set values in a supply duct and an exhaust duct as well as the discriminating characteristic of respective constituting elements while respective constituting elements are controlled by combining the feedfoward signal with a feedback control signal based on a measuring system variable.
MITCHELL JOHN W
KLEIN SANFORD A
Next Patent: FILTER INTEGRATED TYPE AIRFLOW LETTING-OUT UNIT