International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

The growth rates vehicles pose a significant threat to the physical and chemical status of the atmosphere and negatively impact on human health and viability of other living organisms. The ecological status of airspace in the cities of the modern world, is determined by numerous factors, among which the leading position is taken by motor vehicles, during operation of which, along with the exhaust gases, more than 200 chemical compounds are emitted into the atmosphere.

The paper describes the results of studies of motor vehicles on highways adjacent to the territory of Kutaisi, from ecological standpoint.

As a realistic way for solving the problems would be the use of alternative fuels, rational organization and management of traffic flow, and the large-scale introduction of electric cars and hybrid motor vehicles.

The crude oil samples produced from various fields are characterized by wide range of rheological characteristics. On the quantitative indicators of these parameters and, consequently, on the hydraulic resistance of the oil flow movement through the pipeline, significantly depend the possibilities of increasing the pipeline transport carrying capacity.

The created physical model enables to determine rheological parameters of crude oil of various types, such as dynamic viscosity and solidification temperature with the dependence on preheating temperature and concentration of specialty solvents.

Transportation of oil and oil products through the pipeline, due to their high viscosity and the paraffin content is technically and technologically complex process. At present, for the purpose of improving rheological parameters of oil, one of the most effective methods consists in its heating in heat-exchange installations to a certain temperature. The degree of improvement of rheological parameters of oil depends on its heating temperature and conditions of subsequent cooling. Heat treatment improves the inlet capabilities of pumps and allows improving the oil transportation process through the main pipes and pipelines.

The given paper dwells on the design procedure of the heat-exchange installation “the pipe in pipe”. Such type of heat-exchanger is characterized by a simple design and low hydraulic resistance, in which the hot heat transmitter is ecologically clean water.
The process of oil heating in heat-exchanger is the process of convective heat exchange, the intensity of which depends on a number of parameters, including the oil density and viscosity, which in turn are the values depending on temperature. On that basis, the paper dwells on the design procedure of the heat-exchange installation (“the pipe in pipe”) that should enable us to ensure the optimal heating temperature and calculation of geometrical sizes of heat-exchanger through mathematical way.