Статті КЕТтаОП (ДМетІ)

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Browsing Статті КЕТтаОП (ДМетІ) by Author "Kabakova, Liudmyla"

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    Prediction of Fuel Consumption and Carbon Dioxide Emission when Replacing Gaseous Fuels with Renewable Hydrogen or Their Mixture
    (IOP Publishing Ltd, 2024) Gupalo, Olena V.; Yeromin, Oleksandr O.; Kabakova, Liudmyla; Kolienko, Anatoliy; Kirsanov, Mykhailo; Kulikov, Andrii
    ENG: The paper is devoted to predicting changes in fuel consumption and carbon dioxide emissions when industrial equipment is converted to heating with renewable hydrogen or a mixture of it with other gaseous fuels, such as natural gas. The authors developed a simplified methodology that is appropriate for assessing changes in the energy consumption of equipment and the environmental impact of fuel replacement at the stage preceding the equipment reconstruction. The peculiarity of the methodology is that it allows the calculation of fuel consumption and carbon dioxide emissions when fuel replacement is accompanied by the implementation of measures aimed at improving the energy efficiency of equipment. The methodology can be used for heating and thermal furnaces in metallurgy and mechanical engineering, units for heat treatment of raw materials in the mining and processing industries, heating devices in the food industry, and water and steam boilers. In the example of replacing natural gas with its mixture with renewable hydrogen of different compositions, it is shown that the calculation error using the proposed methodology in comparison with the results obtained by mathematical modeling of fuel combustion, gas flow and heat transfer in this furnace does not exceed 1.5%.
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    Study of the Efficiency of Using Renewable Hydrogen in Heating Equipment to Reduce Carbon Dioxide Emissions
    (IOP Publishing, 2023) Gupalo, Olena V.; Yeromin, Oleksandr O.; Kabakova, Liudmyla; Kulikov, Andrii; Sukhyi, Mykhailo; Romanko, Yaroslav V.
    ENG: The results of theoretical study of operation of continuous furnaces heated by natural gas, renewable hydrogen, and their mixture are presented. The furnaces have the same design, but significantly different energy efficiencies due to different heat losses and capability of recuperative fume gas heat utilization system. The measures to reduce heat losses and to increase air temperature for fuel combustion can reduce specific fuel consumption for metal heating and carbon dioxide emissions by 25.8% for natural gas furnaces. For furnaces operating on mixture of natural gas and hydrogen, a greater reduction in carbon dioxide emissions is achieved in furnaces with worse energy efficiency, but with greater fuel consumption for metal heating. The paper shows the possibility of converting a furnace with better energy efficiency indicators to be heated by mixture of natural gas (75%) and hydrogen (25%). The measure reduces the natural gas consumption and carbon dioxide emissions to 9.2% due to the use of hydrogen with specific consumption 13.81 m3 per ton of metal. To ensure the same costs for metal heating when transferring continuous furnaces from natural gas to hydrogen, or their mixture, the ratio of prices for natural gas and hydrogen should not exceed 0.301-0.312.