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CPOTE2022 logo
CPOTE2022
7th International Conference on
Contemporary Problems of Thermal Engineering
Hybrid event, Warsaw | 20-23 September 2022

Abstract CPOTE2022-1125-A

Book of abstracts draft
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Development of a Spray-Ejector Condenser for the use in a negative CO2 emission gas power plant

Paweł MADEJSKI, AGH University of Science and Technology, Poland
Krzysztof BANASIAK, Sintef Energy, Norway
Paweł ZIÓŁKOWSKI, Gdansk University of Technology, Poland
Dariusz MIKIELEWICZ, Gdańsk University of Technology, Poland
Jarosław MIKIELEWICZ, Institute of Fluid-Flow Machinery PAS, Poland
Tomasz KUŚ, AGH University of Science and Technology, Poland
Michał KARCH, AGH University of Science and Technology, Poland
Piotr MICHALAK, AGH University of Science and Technology, Poland
Milad AMIRI, Gdańsk University of Technology, Poland
Paweł DĄBROWSKI, Gdańsk University of Technology, Poland
Kamil STASIAK, Gdańsk University of Technology, Poland
Navaneethan SUBRAMANIAN, AGH University of Science and Technology, Poland
Tomasz OCHRYMIUK, Institute of Fluid Flow Machinery, Poland

Low-emission power technologies with gas turbines are intensely developed and implemented as the most promising energy technologies based on fossil fuels. One promising solution under strong development is a technology using gaseous fuel combustion in pure oxygen when the exhaust gas mixture is composed of H2O and CO2. The paper presents results of computational analyses providing to the Spray-Ejector Condenser (SEC) development, which is one of the crucial components of the being under development negative CO2 gas power plant (nCO2pp) cycle. The Spray-Ejector Condenser is developed to ensure high effectiveness of processes such as the condensation of vapor and compression of CO2 with preparation for separation. Firstly, the main operating conditions in the characteristic points were investigated to evaluate the impact of the operating conditions on the SEC performances. The amount of motive water needed for the cooling purpose is susceptible to the inlet water pressure and temperature and strongly affects the generated pressure of the suction stream. Inside the SEC, the steam and CO2 generated in the Wet Combustion Chamber (WCC) of nCO2pp are in direct contact with cold water. The heat transfer coefficient can reach high values during the direct contact condensation inside the Spray-Ejector Condenser. Still, inert CO2 in the gas stream can significantly reduce the rate of condensation. The development of SEC in thus operating conditions needs to use advanced computational methods and approaches to develop basic design, which is one of the main project goals. The paper presents adopted numerical and analytical approaches leading to the development of the characteristic dimensions of developed SEC and the opportunity to investigate the turbulent flow of water/steam/CO2 mixture together with the condensation process occurring at this same time. The paper also presents the preliminary results of a basic design and geometrical dimensions of the Spray-Ejector Condenser to be applied in the negative CO2 power plant cycle at two different variants. The further direction of the presented computational research activities and results is to test various designs of Spray-Ejector Condensers that will enable the evaluation of the direct contact condensation process and develop the final geometrical design.

Keywords: Two-phase ejector, Negative CO2 gas Power Plant (nCO2PP), CO2 capture, Mathematical modeling, Spray-ejector condenser (SEC)
Acknowledgment: The research leading to these results has received funding from the Norway Grants 2014-2021 via the National Centre for Research and Development. Work has been prepared within the frame of the project: "Negative CO2 emission gas power plant” - NOR/POLNORCCS/NEGATIVE-CO2-PP/0009/2019-00 which is co-financed by programme “Applied research” under the Norwegian Financial Mechanisms 2014-2021 POLNOR CCS 2019 - Development of CO2 capture solutions integrated in power and industry processes.