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Generation of data sets for semi-empirical models of circulated fluidized bed boilers using hybrid Euler-Lagrange technique

Author

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  • Adamczyk, Wojciech P.
  • Myöhänen, Kari
  • Hartge, Ernst-Ulrich
  • Ritvanen, Jouni
  • Klimanek, Adam
  • Hyppänen, Timo
  • Białecki, Ryszard A.

Abstract

The primary goal when designing a CFB boiler is to ensure its high energy efficiency. Additional constraints come from environmental regulations, which are constantly becoming more difficult to assess, and require improvements in the boiler design process. Local on-site measurements are often restricted to short distances inward from the furnace wall, leaving most of the core unmeasured. Computer simulations are practically the only feasible tools to investigate the combustion processes and to support the design of CFB units. Three-dimensional steady-state semi-empirical CFB furnace models predict adequate results within reasonable times but these models require tuning to existing objects, which obviously excludes their application for new object design. The present study represents a step toward using the hybrid Euler–Lagrange (HEL) technique to model flow variables in order to replace the measured data. The information collected using the HEL model for an arbitrary furnace can be used to tune a semi-empirical model. To validate the HEL model, measurements of a 235 MWe CFB were used. The simulations show good agreement between the numerical and experimental results, indicating that the presented idea is worth investigating in the future.

Suggested Citation

  • Adamczyk, Wojciech P. & Myöhänen, Kari & Hartge, Ernst-Ulrich & Ritvanen, Jouni & Klimanek, Adam & Hyppänen, Timo & Białecki, Ryszard A., 2018. "Generation of data sets for semi-empirical models of circulated fluidized bed boilers using hybrid Euler-Lagrange technique," Energy, Elsevier, vol. 143(C), pages 219-240.
    • Handle: RePEc:eee:energy:v:143:y:2018:i:c:p:219-240
    DOI: 10.1016/j.energy.2017.10.029
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    References listed on IDEAS

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    1. Adamczyk, Wojciech P. & Bialecki, Ryszard A. & Ditaranto, Mario & Gladysz, Pawel & Haugen, Nils Erland L. & Katelbach-Wozniak, Anna & Klimanek, Adam & Sladek, Slawomir & Szlek, Andrzej & Wecel, Gabrie, 2017. "CFD modeling and thermodynamic analysis of a concept of a MILD-OXY combustion large scale pulverized coal boiler," Energy, Elsevier, vol. 140(P1), pages 1305-1315.
    2. Seddighi, Sadegh, 2017. "Design of large scale oxy-fuel fluidized bed boilers: Constant thermal power and constant furnace size scenarios," Energy, Elsevier, vol. 118(C), pages 1286-1294.
    3. Wang, Qinhui & Luo, Zhongyang & Li, Xuantian & Fang, Mengxiang & Ni, Mingjiang & Cen, Kefa, 1999. "A mathematical model for a circulating fluidized bed (CFB) boiler," Energy, Elsevier, vol. 24(7), pages 633-653.
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    1. Xuemin Liu & Hairui Yang & Junfu Lyu, 2020. "Optimization of Fluidization State of a Circulating Fluidized Bed Boiler for Economical Operation," Energies, MDPI, vol. 13(2), pages 1-20, January.
    2. Grochowalski, Jaroslaw & Jachymek, Piotr & Andrzejczyk, Marek & Klajny, Marcin & Widuch, Agata & Morkisz, Pawel & Hernik, Bartłomiej & Zdeb, Janusz & Adamczyk, Wojciech, 2021. "Towards application of machine learning algorithms for prediction temperature distribution within CFB boiler based on specified operating conditions," Energy, Elsevier, vol. 237(C).
    3. Alobaid, Falah & Peters, Jens & Amro, Rami & Epple, Bernd, 2020. "Dynamic process simulation for Polish lignite combustion in a 1MWth circulating fluidized bed during load changes," Applied Energy, Elsevier, vol. 278(C).

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