年間 8 号発行
ISSN 印刷: 2150-3621
ISSN オンライン: 2150-363X
Indexed in
EXPERIMENTAL INVESTIGATION OF THERMAL CONDUCTIVITY AND HEAT CAPACITY OF COAL-WATER FUEL
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要約
The paper is devoted to the study of the thermophysical properties of a coal-water fuel produced from high-ash coal or low-reactive coal. The thermal conductivity coefficient of the coal–water fuel was determined by combining a physical experiment with numerical modeling. It is shown that the thermal conductivity coefficient of the coal-water fuel varies from 0.41 to 0.81 W/(m·K) and its value increases with temperature. These values are significantly higher than the value of the same coefficient of natural coal. The coefficient depends on the metamorphic stage of the coal and on the amount of mineral impurities and water contained in the fuel. It was also determined that an increase in the fraction of mineral impurities in coal up to 10% leads to an increase in the thermal conductivity coefficient value to 9-10%. An increase in the water fraction in the coal-water fuel can lead either to an increase or to a decrease in the value of the thermal conductivity coefficient. The heat capacity of the coal-water fuel was investigated by using a calorimetric method. It is found that the heat capacity value of the coal-water fuel varies from 3.5 to 6.5 kJ/(kg·K). The value increases with temperature and depends on the fractions of mineral impurities and water in the fuel. The dependences of the thermal conductivity coefficient and heat capacity value of the coal-water fuel produced from coal of different metamorphic stages on the percentage fractions of water and coal phases in the fuel suspension and on the amount of mineral impurities are obtained from the analysis of experimental data.
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Glushkov Dmitrii O., Kuznetsov Geniy V., Strizhak Pavel A., Syrodoy Semen V., Mathematical model simulating the ignition of a droplet of coal water slurry containing petrochemicals, Energy, 150, 2018. Crossref
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Kuznetsov G.V., Vershinina K.Yu., Valiullin T.R., Strizhak P.A., Differences in ignition and combustion characteristics of waste-derived oil-water emulsions and coal-water slurries containing petrochemicals, Fuel Processing Technology, 179, 2018. Crossref
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Pinchuk V.A., Sharabura T.A., Kuzmin A.V., Pinchuk S.A., The peculiar influence of the mineral impurities content in coal-water fuel on the regularities of fuel drop ignition and combustion, Journal of the Energy Institute, 93, 3, 2020. Crossref
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Glushkov D.O., Feoktistov D.V., Kuznetsov G.V., Batishcheva K.A., Kudelova T., Paushkina K.K., Conditions and characteristics of droplets breakup for industrial waste-derived fuel suspensions ignited in high-temperature air, Fuel, 265, 2020. Crossref
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Pinchuk V.A., Kuzmin A.V., The effect of the addition of TiO2 nanoparticles to coal-water fuel on its thermophysical properties and combustion parameters, Fuel, 267, 2020. Crossref
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Pinchuk Valeriya, Moumane Mohammed, Sharabura Tatiana, Shishko Yulia, Kuzmin Andrey, Applicability of the Graetz’s solution for Newtonian fluids to the calculations of the heat transfer in coal-water fuel at the pre-heating stage, Thermal Science and Engineering Progress, 21, 2021. Crossref
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Pinchuk V.A., Moumane M., Sharabura T.A., Kuzmin A.V., Pinchuk S.A., Evidence of the illegitimacy of the additive approach to the determination of the thermophysical properties of coal‐water fuel with glycerol, International Journal of Energy Research, 44, 14, 2020. Crossref
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Maliga Ilya, Pererva Valeria , Nurumgaliyev Assylbek , Erzhanov Almas , REDUCING HEAT LOSS AND IMPROVING THE EFFECTIVENESS OF THE REHEATING FURNACE BY REDESIGNING THE REFRACTORY LINING , International Journal of Energy for a Clean Environment, 24, 1, 2023. Crossref