Case study on influence of sound insulation control on indoor air distribution

 On the basis of meeting the temperature and humidity control, some special buildings have strict requirements for sound insulation. In order to meet the temperature and humidity control, the ventilation system should adopt large air volume, but the sound insulation control leads to great restrictions on the air supply volume. Two control modes in different directions pose new challenges to the air conditioning and ventilation system. In order to solve the contradiction between sound insulation and thermal comfort, taking a small sound insulation conference room as an example, the air distribution of three air supply modes: down supply and up return, up supply and up return and fixed-point air supply are simulated, and the evaluation indexes of ADPI, air age and PMV-PPD are used to evaluate. The experimental results show that compared with the other two air supply modes, the fixed-point air supply can maintain the thermal comfort of personnel while meeting the requirements of sound insulation, and the air supply volume can be reduced by 6.67%.