Study on the VAV Air Conditioning System by using Conventional Motor-dampers

Abstract

Both theoretical and experimental studies on the VAV air conditioning system by using conventional motor-dampers have been performed to obtain an alternative as far the air handling having both of individuality and saving energy. By adjusting the static pressure in a main duct system under the cascade-control and by keeping the damper degree up a certain value by referring to the static pressure signal, the mutual interference among motor-dampers installed in the system can not only be eliminated, but also the minimum value of the ventilation be maintained. For the case of introducing this proposed VAV system to a general office building whose air conditioning area per a unit system is about 500m^2, the control parameters have been determined. These parameters are applicable in the wide range of actual usage, and moreover the troublesome adjustments of the parameters under construction in a real field can be avoided. From the comparative studies on the system performances, it have been confirmed that the controllability and the energy saving of the proposed VAV system are nearly equivalent to those of a usual VAV system.