Dynamic simulation of a circulating fluidized bed gasifier
Jamalkhoo, Mohammad Hossein (2025)
Diplomityö
2025
School of Energy Systems, Energiatekniikka
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2025050838387
https://urn.fi/URN:NBN:fi-fe2025050838387
Tiivistelmä
The integration of fluctuating renewable energies requires the availability of flexible and dynamic energy systems. Circulating Fluidized Bed (CFB) gasifiers have the capacity to offer a promising solution for stable syngas production and dynamic adaptability. This study develops and validates a dynamic CFB gasifier model using APROS to Analyze part-load behavior. It provides insights into temperature regulation, solid entrainment, and syngas stability.
Simulations at 90%, 80%, and 70% load conditions reveal that the solid entrainment has considerable influences on temperature distribution and overall performance of the gasifier. Partial entrainment in the 90% case can slightly moderate the temperature fluctuations and allows for a more gradual transition. However, rapid solid settling in the 80% and 70% cases leads to faster but more thermally stressful stabilization. The study also confirms that syngas composition remains stable across all scenarios. It illustrates the high capability of CFB gasifiers for integration with gas turbines in hybrid energy systems. This stability is particularly crucial to ensure consistent combustion performance and efficient power generation.
These findings demonstrate the importance of dynamic modeling in optimizing gasifier performance and ensuring stable operation under fluctuating energy conditions. The validated model provides a foundation for further exploration of flexible energy systems integrating CFB gasifiers.
Simulations at 90%, 80%, and 70% load conditions reveal that the solid entrainment has considerable influences on temperature distribution and overall performance of the gasifier. Partial entrainment in the 90% case can slightly moderate the temperature fluctuations and allows for a more gradual transition. However, rapid solid settling in the 80% and 70% cases leads to faster but more thermally stressful stabilization. The study also confirms that syngas composition remains stable across all scenarios. It illustrates the high capability of CFB gasifiers for integration with gas turbines in hybrid energy systems. This stability is particularly crucial to ensure consistent combustion performance and efficient power generation.
These findings demonstrate the importance of dynamic modeling in optimizing gasifier performance and ensuring stable operation under fluctuating energy conditions. The validated model provides a foundation for further exploration of flexible energy systems integrating CFB gasifiers.