Validation of Displacement Ventilation System in a Residential Room

The conventional air conditioning system for residential houses aims to a uniform room temperature, even those places near the ceiling is cooled during the summer. But the displacement ventilation system supplies cold air directly to the occupant space. In order to verify the effectiveness of this system for residential houses, it has been introduced in the experiment house in Kitakyushu. According to the field experiment and CFD simulation, the thermal environment and ventilation effectiveness has been analyzed. The stratification in temperature and CO2 concentration has been verified, and comfortable environment has been achieved in the occupant space. And the energy consumption for cooling by this system is about 20% lower than the conventional system.