Numerical Simulation Of Airflow Form Of Air-conditioning Systems To The Internal Building Atrium

In this paper, an air-conditioning systems airflow organization of Atrium in a shopping mall have been simulated, use the theoretical of computational fluid dynamics. Based on full analysis of the existing literature and theoretical results, proposed the Non-isothermal air-conditioned room air supply simulation methods, including the choice of turbulence model, boundary conditions and simplify the calculation, the internal heat source and the treatment of the grid, etc.. Application of this method , a classic non-isothermal air experiment have been calculated. By the compared of the results with the experimental data, the simulation methods proved to be correct.By using of CFD software, the temperature and velocity field for several different airflow forms of the atrium have been simulated, and show on the results intuitively. Use of the existing two evaluation index-comfort and energy efficiency, evaluated the airflow distribution in the calculated results, so we know which form of air-conditioning airflow can suite of this kind of building, it can be reference for the same type of air-conditioning when design.on the basis of this simulation, think about the special structure of the atrium, we have also amend the temperature efficiency-the index of energy utilization. Proposed a formula definition of temperature efficiency for internal atrium, and further improve the evaluation of the existing air distribution system.