earticle

영어

Large enclosure means a structure of high ceiling and large floor. In designing the heating system, many thermal conditions are considered, such as thermal comfort, IAQ(Interior Air Quality), heating load and energy efficiency etc. In this study, we propose a comfortable indoor climate conditions through proper air distribution analysis formed in residential areas according to various angles of the diffuser. The simulation conditions are 7 m high diffuser, 4/2 inlet/outlet diffusers, 39°C discharge air temperature, and 6 m/s exit velocity. The results show that 45° diffuser provides an optimal thermal environment, and the reason is that the velocity reaches the desired velocity below 0.3m/s at 1.18m elevation plane. As the diffuser angle is decreased, the asymmetry of the velocity distribution is increased due to the thermal buoyancy effect.