The Anechoic Design For Auditorium Chair Ventilation System And Absorption Research Of The Outlet

In recent years, the seat of displacement ventilation system is widely applied in the places like cinemas, theaters, concert halls, auditorium and other public buildings. Because auditorium region is lager and the seats elevation between ground and roof is high, in order to provide effective air conditioning effect and reasonable air distribution, one kind of special displacement ventilation—under-seat air supplies system appears. Diffusers are installed under chair and fixed the ground. As a support structure, it also is export terminal of auditorium's air-conditioning. In addition, it also delivers the processed air through static pressure trunk to the region where audience sits. This method simplifies the blast pipe and can be evenly distributed the air flow. It not only can indoor air flow organized rationally, but also can air temperature and humidity,flow rate satisfied. What's more, the noise control should also be concerned about. In the auditorium acoustics design, air-conditioning system's noise control is particularly important.According study, the thesis contains two parts, the one is about airflow noise of the low speed air from the auditorium chair diffuser, including the anechoic design theory and experimental research on the airflow noise from the auditorium chair diffuser. In addition, on the basis of tests,it also compares several types of diffusers' noise characteristics and air flow speed. This is not only supplies calculation data for the anechoic design, but for selecting the chair diffusers, it also brings theoretical basis. The other part is the absorption characteristic research for the outlet under chair. When forecasting auditorium reverberation time, the data of the absorption seat did not consider its outlet absorption, which will affect the accuracy of the forecast. At the moment, because lack of the reliable data, this model test(1:10) based on a preliminary study and attempt to come to get some characteristics.In many practical Projects, under-seat air supplies of air conditioning system is the last decorating of the whole, the exposure issues before or after the final installation process should concern. Therefore, the relevant professional should actively cooperate with each other beforehand to make sure the last engineering come to people's desire effect.