Solution to unbalanced air supply in start-up stage of variable air volume (VAV) air conditioning systems

 Analyses the common air balancing method and the operation control method in the start-up stage of VAV air conditioning systems. Summarizes the causes of unbalanced air supply in the start-up stage. Analyses the influence of manual air dumpers installed in branch ducts on air dumpers of VAV-BOX. Proposes a new method to solve the problem of unbalanced air supply in the start-up stage of VAV air conditioning systems.