Influence of Inlet Opening Size on the Operation of Natural Ventilation System of a Multistory Residential Building

Equipping buildings with dense windows required designers to take into account the aerodynamic resistance of the inlet devices. Much more complicated comparing with the period of twenty years ago, the layout of apartments has led to an increase in the number of prefabricated channels of natural exhaust ventilation systems in each apartment of the residential house. In the aerodynamic calculation of each exhaust system should be considered the ventilation path, starting from the outside air in the inlet unit of the living room and ending above the exhaust shaft of the system. The results were obtained on the basis of calculations of the air regime of the building as a whole. In this article, the calculation of the air regime of the building was carried out by the iterative method. The object of the study is a section of a residential building with 18 residential floors equipped with natural ventilation systems. The article considers the air flow in two versions: through the swing-out window with an open area of 0.231 m² and through the supply valves in each room of the apartment with a living section of one valve of 0.0036 m². It is shown that in case of insufficient area of supply devices it is impossible to provide the calculated flow rate of ventilation air under the calculated ventilation conditions even with the help of air ducts of unrealistically large sizes.

E.G. MALYAVINA¹, Candidate of Sciences (Engineering), Professor (This email address is being protected from spambots. You need JavaScript enabled to view it.)
K.M. AGAKHANOVA¹, Master
N.P. UMNYAKOVA², Candidate of Sciences (Engineering), (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)
² Research Institute of Building Physics of RAACS (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)

список