Description: The object of the study is the methods of modeling the processes of ventilation of the above-ground vertical steel reservoir. The tank is used to store light petroleum products (gasoline, diesel fuel, kerosene). One of the most problematic places in this operation is the extremely high level of explosion and fire hazard, and therefore, a significant danger to the life and health of people in the zone of influence of the revivers. During the forced ventilation of the reservoir (VST-5000 1,5 tons), a couple of petroleum products fall into the atmosphere. To minimize this disadvantage, the application of the technology of absorptioncondensation recovery of petroleum vapor, whose efficiency reaches 99%, is proposed in this document. The use of the ejector air supply during forced ventilation of tanks with the subsequent capture of oil vapor through the absorption and condensation means provides for the prevention of such a risk. The maintenance of petroleum products is subject to further use, which provides additional income. On the basis of theoretical and experimental research confirmed the regularities of the process of ventilation of the tank with residual light petroleum products. The method of modeling the processes of ventilation of tanks with residues of one-component and multi-component liquids, as well as degassing processes, is substantiated. In the simulation of the processes of ventilation of tanks with residues of single-component and multi-component liquids it is possible to use the same methods. Thus, the proposed method allows not only to reduce the technogenic load on the environment, but also has an economic effect.
Keywords: ventilation of reservoirs, light oil products, mathematical modeling