The research and development of high-accuracy simulation calculation and design software is great significance to the design of energy-saving buildings and is an important subject of current natural ventilation research. Mcwell has a systematic analysis method based on Simulation CFD to simulate the ventilation fluid of building natural ventilators.

Strengthen the research of multiple ventilation systems. Multiple ventilation adopts the method of combining mechanical ventilation and natural ventilation devices to organically combine natural driving force and mechanical driving force; maintain a good indoor environment by switching between mechanical ventilation and natural ventilation. And avoid the cost, excessive energy consumption and environmental problems caused by the building's annual operation of the air-conditioning system.

The basic principle is that the operating mode of the system changes with the change of seasons. It is a system that can use the different characteristics of natural ventilation and mechanical ventilation at different times and seasons. It can give full play to the advantages of natural ventilation and mechanical ventilation to ensure indoor ventilation. Under the premise of air quality and moderate air quality, the energy consumption and operating cost of building air conditioning can be reduced. In the design,

mechanical ventilation and natural ventilation can operate independently as a system, or they can be combined together, one as the main and the other as the auxiliary (the choice of the main and auxiliary can be based on the appropriate requirements of the environment or the room), unified adjustment according to the situation, so that the effect can be achieved. . The use of multiple ventilation allows more personal control, and makes up for the shortcomings of simple natural ventilation that cannot be adjusted.