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Review of Process Modeling of Solid-Fuel Thermal Power Plants for Flexible and Off-Design Operation

Author

Listed:
  • Ioannis Avagianos

    (School of Mechanical Engineering, National Technical University of Athens, Zografos Campus, 9 Heroon Polytechniou, Zografos, GR-15780 Athens, Greece)

  • Dimitrios Rakopoulos

    (Chemical Process and Energy Resources Institute, Centre for Research and Technology Hellas, 6th km Charilaou-Thermi Road, Thermi, GR-57001 Thessaloniki, Greece)

  • Sotirios Karellas

    (School of Mechanical Engineering, National Technical University of Athens, Zografos Campus, 9 Heroon Polytechniou, Zografos, GR-15780 Athens, Greece)

  • Emmanouil Kakaras

    (School of Mechanical Engineering, National Technical University of Athens, Zografos Campus, 9 Heroon Polytechniou, Zografos, GR-15780 Athens, Greece
    Chemical Process and Energy Resources Institute, Centre for Research and Technology Hellas, 6th km Charilaou-Thermi Road, Thermi, GR-57001 Thessaloniki, Greece
    Mitsubishi Hitachi Power Systems Europe GmbH, Schifferstraße 80, 47059 Duisburg, Germany)

Abstract

Since the widespread deployment of non-dispatchable, intermittent, and highly variable power production from renewable energy sources (RES), the demand for flexible power production has been steadily growing. As new-built dispatchable power plants have not been very quickly adapted to the emerging flexible operation, this task has been addressed by existing plants as well. Existing solid-fuel thermal power plants have undergone an extensive study to increase their flexible operation. Thermodynamic process-modeling tools have been extensively used for plant modeling. Steady- and transient-state simulations have been performed under various operating regimes, supplying valuable results for efficient power-plant operation. Flexibility aspects regarding low-load operation and steady operational conditions are mostly investigated with steady-state simulations. Flexibility aspects related to variation over time such as ramping rates are investigated with transient simulations. The off-design operation is mainly attributed to the existing fleet of power plants, struggling to balance between their former operational schemes as base and/or medium-load plants. However, off-design operation is also considered for new plants in the design phase and is included as a simulation aspect. Process modeling turns out to be a proven tool for calculating plant flexibility and predicting extreme operating conditions, defining further steps for a new operational scheme, drafting accident mitigation control procedures or, furthermore, provisioning more complex and cross-field future tasks. A review of the off-design aspect as a simulation approach is undertaken and presented in this work. Finally, challenges and future perspectives for this aspect of solid-fuel thermal power plants are discussed.

Suggested Citation

  • Ioannis Avagianos & Dimitrios Rakopoulos & Sotirios Karellas & Emmanouil Kakaras, 2020. "Review of Process Modeling of Solid-Fuel Thermal Power Plants for Flexible and Off-Design Operation," Energies, MDPI, vol. 13(24), pages 1-41, December.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:24:p:6587-:d:462105
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    References listed on IDEAS

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    3. Taler, Dawid & Dzierwa, Piotr & Kaczmarski, Karol & Taler, Jan, 2022. "Increase the flexibility of steam boilers by optimisation of critical pressure component heating," Energy, Elsevier, vol. 250(C).
    4. Tayma Afaneh & Omar Mohamed & Wejdan Abu Elhaija, 2022. "Load Frequency Model Predictive Control of a Large-Scale Multi-Source Power System," Energies, MDPI, vol. 15(23), pages 1-21, December.

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