RESEARCH OF AIR QUALITY PARAMETERS OF OPEN SPASE UNDERGROUND LOCATION

The work has conducted a study of the air space indicators of underground Open Space premises, which were converted from existing premises of buildings that were not adapted for permanent occupancy by people. The actual indicators of carbon dioxide, radon, and fine dust of the respirable fraction were measured and methods for normalizing these parameters were proposed. As a result of the study of the air quality parameters of underground Open Space premises, measurements and analysis of the concentration levels of fine dust, radon, and carbon dioxide were performed. The level of dust in underground open-plan spaces has minor deviations from the normalized indicators and is mainly due to the concentration of dust particles in the incoming air, which can be adjusted by installing special filters when supplying air to the premises. It was determined that the dynamics of CO2 concentration is significantly affected by the number and concentration of people in the space of the room, as well as the existing level of carbon dioxide concentration in the supply air, which necessitates the need to take this feature into account when calculating the multiplicity of air exchange in the room and the possibility of predicting zonal ventilation of the room based on CO2 indicators. It was established that the levels of Rn radiation in rooms of the Open Space type located underground do not fully comply with the regulated values and can significantly affect the general condition of people who are constantly in such rooms. Normalization of average daily indoor radon levels and fine respirable dust can be regulated by adjusting the ventilation systems of the underground premises. It is proposed to take into account the relative coefficient of radon exposure when calculating the multiplicity of air exchange in the room to reduce its concentration level to normalized indicators.