Research on the effect of the size of the wall-hanging air-conditioner indoor unit on the indoor thermal comfort

The geometrical dimension of the wall-hanging air-conditioner indoor unit affects the indoor thermal comfort. In this paper, fluent software is used and standard k-e two equation turbulent model is chosen to carry out the simulation of the indoor temperature field and flow field of six different sizes of the single wall-hanging indoor air-conditioner in the room. The temperature distribution, velocity distribution and PMV distribution of the plane which is 1.8 m from the ground are given. It can be known that under the condition of six kinds of sizes of the wall-hanging air-conditioner indoor unit, when the size of the air-conditioner indoor unit is 0.4m × 0.2m × 0.2 m, the temperature variation at the z = 1.8 m section is relatively small, the temperature distribution is more uniform. When the size of the air-conditioner indoor unit is 0.5m × 0.2m × 0.2 m, the temperature difference at the z = 1.8 m section is relatively smaller, PMV is closest to 0, and the thermal sensation is almost moderate. Therefore when the size of the air-conditioner indoor unit is 0.5m × 0.2m × 0.2 m, better indoor comfort can be achieved.