Real time control of chilled water supervisory controller in central air conditioning systems

From the viewpoint of basic automatic control system, designs two chilled water supervisory controllers and applies them to digital simulators to real time control of the supply/return pressure difference and of both the difference and the supply chilled water temperature. Analyses the influences of the supervisory controller on control stability and energy consumption of the system by simulation experiment. The simulation results show that the controller making trade off between chillers and chilled water pumps is practicable in saving the total energy of chilled water system while still keeping the control stability.