Solar Ventilation Chimney And Inducing Combination Used In Underground Garage In The Study

With the increase in car ownership, people demand for higher request of parking management. Ductless inductive ventilation system is more and more popular for its space-saving, high ventilation efficiency. As more beam column constructions in underground garage, blind space of airflow will appear in underground garage with a ductless inductive ventilation system, and the lack of management, practical effects of this system is not so power. Meanwhile, we’d like to integrate a building unit with the ductless inductive ventilation system, which can enhance natural ventilation, named solar chimney. So that we can get a new way to provide a good air quality in underground garage, which is more energy saving and high efficiency.In this paper, theoretical and numerical methods are used to research project.In order to obtain the correct mathematical model and boundary conditions; we make a simple model to replace the single inducement fan with three air openings. By constantly changing of boundary conditions and Verification with formula data, we believe the model we made can be well performed in our numerical study. We also do the three-dimensional simulation of solar chimney. Compared with the formula data, the simulation data are very close. On this basis, we simulate a single inducement fan and a single chimney, and we get several design parameters for the further study.As no paper had ever talked about this combined system, the model we make was not so good. But we find a chimney with a huge enough body can satisfy requirement of air change rate for6times per hour. Because of low heat pressure, air velocity in the entrance is also slow. So most air sucked by the chimney comes from upper space of garage. With little influence to the breathing zone of people (1.5meters above ground), pollutant removal efficiency is really low. In addition, we study the influence caused by the relative positions of exhaust outlet, induced fan and solar chimney. The results show that when exhaust outlet and solar chimney are in the same side, the exerting of exhaust outlet will have a negative effect to the ventilation performance of solar chimney, the relative position closer the influence greater. But the exerting of induced fan will not do much for the performance of solar chimney.We create a new ventilation system of underground garage, Research results can be used in the design of ventilation system of underground garage.