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Operational Flexibility of a CFB Furnace during Fast Load Change—Experimental Measurements and Dynamic Model

Peters, Jens ; Alobaid, Falah ; Epple, Bernd (2021):
Operational Flexibility of a CFB Furnace during Fast Load Change—Experimental Measurements and Dynamic Model. (Publisher's Version)
In: Applied Sciences, 10 (17), ISSN 2076-3417,
DOI: 10.26083/tuprints-00018641,
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Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Status: Publisher's Version
Title: Operational Flexibility of a CFB Furnace during Fast Load Change—Experimental Measurements and Dynamic Model
Language: English
Abstract:

The share of power from fluctuating renewable energies such as wind and solar is increasing due to the ongoing climate change. It is therefore essential to use technologies that can compensate for these fluctuations. Experiments at 1 MWth scale were carried out to evaluate the operational flexibility of a circulating fluidized bed (CFB) combustor during transient operation from 60% to 100% load. A typical load following sequence for fluctuating electricity generation/demand was reproduced experimentally by performing 4 load changes. The hydrodynamic condition after a load change depends on if the load change was in positive or negative direction due to the heat stored in the refractory/bed material at high loads and released when the load decreases. A 1.5D-process simulation model was created in the software APROS (Advanced Process Simulation) with the target of showing the specific characteristics of a CFB furnace during load following operation. The model was tuned with experimental data of a steady-state test point and validated with the load cycling tests. The simulation results show the key characteristics of CFB combustion with reasonable accuracy. Detailed experimental data is presented and a core-annulus approach for the modeling of the CFB furnace is used.

Journal or Publication Title: Applied Sciences
Journal volume: 10
Number: 17
Collation: 26 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
Divisions: 16 Department of Mechanical Engineering > Institut für Energiesysteme und Energietechnik (EST)
Date Deposited: 30 Jul 2021 08:01
Last Modified: 30 Jul 2021 08:01
DOI: 10.26083/tuprints-00018641
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-186415
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/18641
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