Indoor Air Quality Testing And Air Distribution Analysis In An Office Building

Reasonable air distribution is critical to the improvement of indoor air quality. It’ssignificant to study the impact of the different air supply method to indoor pollutantcontrol.Combined with a project of Shaangu，The field testing of indoor air quality wasconducted in an office building in the heating season.The test parameters include:temperature, indoor wind speed,humidity, radiant temperature, the PMV and PPD, CO₂concentration and CO concentration,TVOC content, supply air compliance rate, freshair check,supply air temperature and velocity, thermal stratification, outdoor parameterdetection and so on. The test results show that the indoor temperature and CO₂concentration is high, causing the indoor staff feel sultry symptoms.Focus on research the room of the sick building syndrome. Build the geometricmodel based on the test data, use CFD software for numerical simulation, test valuescompared with the simulation results,to observe the change trend of the temperaturefield, velocity field and CO₂concentration, verified the feasibility of using the model toresearch indoor air quality and air distribution.Based on the above analysis focus on the impact of different supply air temperature,different air speeds and the diffuser different supply air angle on the CO₂concentrationdistribution and variation tendency,diffuser supply air angle changes have a significantimpact on the level of CO₂concentration,when the angle of40°helps reduce indoorCO₂concentration in winter, at the same time does not cause cold draftsensation.Increase the supply air speed can also have very good effect, but increasedoperating costs and energy consumption and may cause cold draft sensation. The supply air temperature changes only affect the indoor air temperature.