The Air Distribution Design in Summer of a Large Space in Lanzhou

More and more HVAC designers are facing challenges to reasonably design airflow in more and more large spaces, and the combination of design specifications and numerical simulation technology could be an effective method to deal with them. The children’s playground in Lanzhou involved in this paper is 9412 m² and 20 m high, in which how to aesthetically furnish the air ducts and tuyeres is one of the design challenges. Firstly, the paper gives the preset design of air distribution in the children’s playground, and then, based on numerical simulation results, the scheme of 9 mushroom-shaped air columns along the floor with 1.8-m diameter and 4 m high is determined. The air supply volume of each column is 36,000 m³/h which is discharged from 36 spherical nozzles arranged along the ringside of the mushroom cap with the speed 6.7 m/s and the temperature 16 °C. Nine shutter air outlets are scattered at the sidewalls and 0.3 m high from the floor. In addition, we believe that it is more reasonable to divide the solar radiation on the transparent skylight into the roof heat flow and the internal heat source during numerical simulation.