Abstract
As a proportion of the fan power input occupied in the total energy consumption is significant, it becomes important to save air conveyance consumption recently in order to conserve air conditioning energy along with a reduction in the building air conditioning load. In the previous reports, some different effects of energy saving between some different kinds of VAV control and fan control systems are introduced. In this report, we measured the air conditioning energy consumption saved with the VAV systems being controlled by adapting air supply volume measurement of each VAV and compared this system with the static pressure control system of air supply duct. As a result of these studies, the following was found; Along with the reduction of air supply volume, the energy saving effect is upgraded when compared to the static pressure control system of air supply duct. For example, as the air supply volume reduces to about 30%, the fan power input being controlled by this system counts for about 45% when compared to the static pressure control system of air supply duct. According to the results of the theoretical calculation of fan rotation and static pressure, the reduction of the fan rotation and static pressure indicates an approximate value equal to the results of actual measurements. Because of the operation performed with low air volume for many hours, this VAV system was proved to be effective.
