Architecture Engineering and Science

Aiming at the problems of high energy consumption and poor indoor air quality in modern office buildings, this study uses computational fluid dynamics (CFD) technology to numerically simulate and optimize the coupling system of natural ventilation and mechanical ventilation in a typical high-rise office building. By establishing a three-dimensional model and using the standard k-ε turbulence model to solve the flow field inside and outside the building, the ventilation effect of the building in different seasons and at different times is analyzed. The research results show that a reasonably designed coupling system of natural ventilation and mechanical ventilation can effectively improve the indoor air quality and significantly reduce the energy consumption of the building. In the transition season, making full use of natural ventilation can reduce the operating time of the air-conditioning system by more than 30%; in summer and winter, the total energy consumption of the building can be reduced by 15%-20% by optimizing the ventilation strategy. This study provides an important reference for the design and operation optimization of the ventilation system of office buildings.