Numerical Study of the Non-Azeotropic Mixture Outflow in Event Accident in the Building Cooling System

The range of values of the pressure of the refrigerating agent at adiabatic compression of vapors in the compressor, within which the cycle of operation of the cooling machine should be carried out, is graphically represented. The distribution of concentrations of a harmful substance – a refrigerating agent in the volume of a room in the event of depressurization of the building’s cooling supply elements is studied and the most dangerous area for human health and the critical time spent in it are determined. The amount of refrigerating agent in the system is determined depending on the cooling capacity of the outdoor unit and on the length of the freon lines, taking into account the parameters of the outdoor air. An analytical dependence is developed for determining the time of leakage of the refrigerating agent into the volume of the room, depending on the configuration of the air conditioning system and its cooling capacity. Based on the study of changes in the amount of refrigerating agent and the time of its expiration before reaching the maximum permissible concentration in the working area of the room, recommendations are presented for optimizing the parameters for monitoring the content of harmful substances in the room air, depending on the characteristics of the system.

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