Air conditioning and heating design analysis for large spaces in severe cold zone

Air conditioning and heating for large spaces in severe cold zone is a difficult point in HVAC design.A reasonable air conditioning and heating scheme should be made according to the architectural and structural constraints of the project. Taking the China-Korea City Pavilion project as an example, this paper analyses the characteristics of dual temperature gradients in large spaces, and proposes a combination air conditioning system,in which the double stratified air conditioning system is installed on the long side,vertical fan-coil units are arranged near the building envelope, the air supply islands are added in the middle area, and the double opposite blowing hot air curtains are installed at the gates. It is pointed out that the design should not only meet the comfort requirements of the operation conditions of large spaces, but also pay attention to the anti-freezing design of the entire building.