Automatic Control Technology in the HVAC System

In the field of VAV air-conditioning system (variable air volume, VAV) control theory and practical study, the paper analyzed the methods used by the China´s VAV control procedures including static pressure control, variable pressure control and total air volume control, and compared the strengths and weaknesses among them. Based on the analyzing, according to the current VAV control´s situation and actual project, the paper adopted the method of total air volume control, proposed the control algorithms and accomplished the practical control procedures.