Abstract
The analysis of further prospects for increasing the efficiency of transportation of coal-water fuel in hydro-transport systems of industrial enterprises is carried out. The mathematical model of the spatial three-dimensional flow of coal-water fuel was developed on the basis of SST turbulence model based on the solution of Navier-Stokes equation. As a result of the calculation, the values of pressure loss, flow rate and velocity distribution over the cross section of the pipeline in the straight section and in the turn were determined, which allowed determining the energy consumption during coal-water fuel transportation in the industrial hydro-transport system. The performed studies allowed us to refine the mathematical model of water-coal suspension flow and, thus, improve the patterns of influence of hydro-transportation scheme and parameters of coal-water fuel on energy consumption for its supply to enterprise consumers. By means of mathematical model of non-Newtonian fluids flow, the patterns of influence of hydro-transport system parameters and transportation modes of coal-water fuel on its energy indicators in industrial hydro-transport systems are determined. The obtained results are related to reduction of energy consumption, optimization of enterprise transport network configuration and increase of efficiency of coal-water fuel transportation to enterprise energy facilities.
Highlights
The sustainable development of fuel and energy complex of Ukraine is associated with the use of alternative fuels, which are the most efficient and cost-effective for the energy sector of the country
Granulometric composition (GMC) of coal-water fuel (CWF) influences the viscosity of the rheological model, which further has an effect on the velocity profile and pressure losses of fuel flow (Fig. 4)
It is determined that further prospects for increasing the efficiency of CWF transportation in hydro-transport systems (HTS) of industrial enterprises are based on optimization of granulometric composition of solid fuel component and its concentration
Summary
The sustainable development of fuel and energy complex of Ukraine is associated with the use of alternative fuels, which are the most efficient and cost-effective for the energy sector of the country. The enterprises of thermal power and coal mining complex of Ukraine: mines and concentrating factories – have in their structure boilerhouses working on coal with the total annual demand of the enterprise up to 150 thousand tones. Further prospects for the use of coal fuels in Ukraine are inextricably connected with the use of coal-water fuel (CWF). Industrial hydro-transport systems (HTS) used for transportation of CWF have a wide application range: power industry, metallurgy, construction materials production, chemical industry. CWF consumers can be small, medium and large industrial enterprises of thermal energy and coal-mining complex: mines and concentrating factories. Industrial HTS (IHTS) can be transport arteries of fuel and energy or fuel and metallurgical complexes; can supply CWF to heating, heating and production and production boiler houses on the enterprise territory. The disadvantage of pipeline hydrotransport is the increase in energy consumption , depending on the proportions of various fractions of granulometric composition (GMC) of the transportation product, as a result, in case of inappropriate composition, energy consumption for CWF transportation increases by up to 1.5-1.7 times [1]
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