Load characteristics of stratified air conditioning systems with nozzle air supply in large space buildings

This study uses CFD simulation and scale model experiment to study the vertical air temperature distribution and load characteristics of the stratified air conditioning system with the nozzle air supply in large space buildings. The influence of the exhaust airflow ratio at the top of the building on the air conditioning load is analysed. Increasing the exhaust airflow ratio can reduce the convective transfer load from the non-air-conditioned area to the air-conditioned area, but has less effect on the radiation transfer load.Based on the simulation results, the convective transfer load nomographs of stratified air conditioning under different exhaust airflow ratios are drawn, and compared with that in the design manual. The nomograph that meets the design requirements is given.