Abstract
Mixing flow condition in regenerative water vessel of open circuit type which is included in air conditioning system must give the effect also to energy consumption by equipments of the system. The analytcal method for behavior and energy comsumption of equipments is presented and a simulation program was made. A standard model of air conditioning system including a regenerative water vessel is set and on three cases of the model, in which each combination of perfect mixing flow and piston flow in the vessel is different, equipment behaviour and energy comsumption are simulated by the program. From the results, running time of heat source machine and energy comsumption are compared for the effect by flow condition type. At the same time, the quantitative effect to energy comsumption by heat loss from the vessel is made clear.