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Optimization strategies of different SCO2 architectures for gas turbine bottoming cycle applications

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  • Gotelip, Thiago
  • Gampe, Uwe
  • Glos, Stefan

Abstract

Cycle architecture, fluid parameter selection, and component design of an exhaust/waste heat recovery cycle require an integral approach. The exhaust/waste heat shall be utilized to a maximum, at minimum costs. The bottoming cycle needs to be aligned with the topping cycle regarding operational behavior, especially for a part load. To analyze potentials of exhaust heat recovery in a combined gas turbine sCO2 cycle, the bottoming cycle's optimum cycle architecture and fluid parameters have to be determined. A thermo-physical model of the sCO2 bottoming cycle, including knowledge of component design, component behavior, and costs, is based on the optimization procedure. As part of the CARBOSOLA project, techno-economic optimizations for a use case of exhaust heat recovery have been carried out. The paper aims to present the optimization methodology followed by the specific use case's boundary conditions, investigated sCO2 cycle architectures, and results of optimum cycle architecture and fluid parameters for maximum heat recovery and minimum costs. Attention will also be paid to accurate modeling of heat exchangers operating near the critical point.

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  • Gotelip, Thiago & Gampe, Uwe & Glos, Stefan, 2022. "Optimization strategies of different SCO2 architectures for gas turbine bottoming cycle applications," Energy, Elsevier, vol. 250(C).
    • Handle: RePEc:eee:energy:v:250:y:2022:i:c:s0360544222006363
    DOI: 10.1016/j.energy.2022.123734
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    References listed on IDEAS

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    1. Doninelli, M. & Morosini, E. & Di Marcoberardino, G. & Invernizzi, C.M. & Iora, P. & Riva, M. & Stringari, P. & Manzolini, G., 2024. "Experimental investigation of the CO2+SiCl4 mixture as innovative working fluid for power cycles: Bubble points and liquid density measurements," Energy, Elsevier, vol. 299(C).
    2. Jiang, Yuemao & Ma, Yue & Han, Fenghui & Ji, Yulong & Cai, Wenjian & Wang, Zhe, 2023. "Assessment and optimization of a novel waste heat stepped utilization system integrating partial heating sCO2 cycle and ejector refrigeration cycle using zeotropic mixtures for gas turbine," Energy, Elsevier, vol. 265(C).
    3. Fabrizio Reale & Raffaela Calabria & Patrizio Massoli, 2023. "Performance Analysis of WHR Systems for Marine Applications Based on sCO 2 Gas Turbine and ORC," Energies, MDPI, vol. 16(11), pages 1-19, May.

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