The Improvement of Hazardous Chemicals Transportation Methods by Motor Vehicles

Abstract

Purpose: The issue of hazardous chemicals transportation by motor vehicles is especially crucial nowadays, given recent geopolitical situation. Transportation inside the country has become a key task for the Russian Federation. The improvement of motor vehicle construction is required in order to provide security of the transportation process. Methods: The tool for research and analysis of the issue of choosing the optimal crosssection of the relief valve on a tank car is the flow section diameter of the tank car’s relief valve. Results: The article proposes calculations for the cross-section of the relief valve of a tank with a larger diameter than those currently installed on tank cars in Russia. The article also provides statistical data on accidents in road transport from 2018 to 2020. Practical significance: Semi-empirical models of thermophysical processes inside a tank during the occurrence of excess pressure have been described by numerous authors. The level of development of the topic of this research is relatively low, unlike topics dedicated to excess pressure in pressure-relief tanks and thermodynamic processes. The article discusses the improvement of designs of tank cars used for the transportation of light petroleum products. The authors have offered a way to improve the construction of a tank with the help of installation of a relief valve of a bigger section. The results of the calculations of the optimal section in the relief valve are presented in a tabular form. The calculation has practical significance as in the case of integration of the data on relief (breather) valves there exists a possibility of increasing the stability of the thin shell of a tank and so of increasing the security during the transportation by motor vehicles. The enlargement of flow area of the tank relief valve is a technically efficient and economically profitable way to increase the degree of transportation process security.