Abstract
Carbon dioxide atmospheric emissions grow continuously. This is why the electricity production prospects are related to the highly efficient oxygen-fuel power production plants. The most efficient of these plants are based on the Allam cycle that reaches its maximal efficiency at 1100 °C. Further temperature increase reduces the cycle efficiency because of remarkable growth of the turbine cooling losses. This problem may be solved by changes of the cooling system heat carrier. This work studies influence of the cooling agent type upon the oxy-fuel cycle efficiency. Application of the closed nitrogen cooling system with utilization of the heat taken from hot turbine elements in a turbo-expander allows 1.2 times reduction of the coolant flow and a 1.5% increase of the cycle efficiency at the initial temperature increase from 1100 to 1300 ℃.
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Acknowledgements
The study is conducted within the project “Development of research base for high temperature oxy-fuel cycle turbines” supported by the MEI grant on research studies “Power production”, “Electronics, radio and IT”, “Industry technology 4.0 for industry, robotic machinery” in 2020–2022.
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Osipov, S., Vegera, A., Sklyar, N., Lvov, D. (2022). Research of the Coolant Type Effect on the Oxy-Fuel Combustion Power Cycle Efficiency. In: Solovev, D.B., Kyriakopoulos, G.L., Venelin, T. (eds) SMART Automatics and Energy. Smart Innovation, Systems and Technologies, vol 272. Springer, Singapore. https://doi.org/10.1007/978-981-16-8759-4_40
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DOI: https://doi.org/10.1007/978-981-16-8759-4_40
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