Calculate modeling of the level of indoor air pollution during its cleaning with air purifiers

The article proposes a computational method for determining the concentrations of pollutants inside a ventilated or cleaned room, taking into account the initial conditions and parameters of the flow rate, incoming or purified air, the volume of the room, the initial concentrations of the pollutant in the atmospheric air and in the room air, the parameters of the efficiency of the air cleaner.

The article proposes the solution of two mass transfer equations under known initial conditions for two methods of cleaning rooms. When solving the first equation, a direct mass transfer calculation was carried out, which makes it possible to determine the effect of natural or artificial ventilation used indoors with small linear dimensions on the change in the concentration of the selected air polluting substance in the form of a chemical compound or an aerosol containing biological or chemical pollutants. When solving the second equation, a direct mass transfer calculation was carried out, which makes it possible to determine the effect of the operation of an air purifier used indoors with small linear dimensions on the change in the concentration of the selected air polluting substance in the form of a chemical compound or an aerosol containing biological or chemical pollutants.

Calculations allow us to determine the time during which a residential office or industrial space is saturated with pollutants or cleaned to the required air quality standards, taking into account the influence of factors such as pollution of the surface layers of atmospheric air, the appearance of pollutants inside the room, the performance and efficiency of ventilation or air purification systems. The proposed calculation methods can be used to determine changes in the quality of indoor air over time, including taking into account changes in oxygen concentrations and pollutants indoors, determining the effectiveness of ventilation and air purification systems of various capacities in residential, office, medical and industrial premises.

Ethics. The study does not require the submission of a biomedical ethics committee opinion or other documents.

Contribution:
Martynov D.Yu. — research concept and design, text writing;
Nikanov A.N. — editing;
Kizeev A.N. — editing;
Kulnev V.V. — research concept and design;
Nasonov A.N. — data collection and processing;
Lagutina N.V. — data collection and processing;
Tsvetkov I.V. — data collection and processing;
Kulneva E.M. — data collection and processing;
Mezhova L.A. — text writing;
Lugovskoy A.M. — text writing;
Novikov A.V. — data collection and processing.

Funding. The study had no funding.

Conflict of interests. The authors declare no conflict of interests.

Received: 07.07.2022 / Accepted: 12.09.2022 / Published: 25.11.2022

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