Eulerian CFD fouling model for fixed bed biomass combustion systems. (15th October 2020)

• Record Type: Journal Article
• Authors: Chapela, Sergio; Porteiro, Jacobo; Míguez, José Luis; Behrendt, Frank
• Is Part Of: Fuel. Volume 278(2020)
• Publication Date: 2020-10-15
• Subjects: Eulerian -- CFD -- Biomass -- Fouling -- Combustion; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2020.118251
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: Biomass combustion and fouling model embedded in Eulerian framework. Two-way interaction between granulometries and gas phase. Lower overall computational effort. Experimental validation and comparison with previous Lagrangian model. Good accuracy on smaller granulometries and reasonable for bigger granulometries. Abstract: Driven by a society that is becoming more aware of the environment over the recent decades, biomass use has increased on both the domestic and industrial scales. In addition, the ease of the use of biomass as a transition fuel in non-renewable solid fuel installations has contributed to this rising trend. Nevertheless, the use of biomass presents serious operational problems, especially in facilities not designed for biomass combustion or in cases of low-quality biomass. To manage these issues, CFD codes have become a powerful tool that provides valuable data on the phenomena involved inside facilities. Previous works of the authors examine the fouling phenomenon through a deeply optimized Euler-Lagrange framework; nevertheless, the computational effort is still high and not suitable for highly parallelised environments. Due to the physical limitations, the IT industry research on the core density inside each die is evolving faster than that on the individual core performance. Therefore, parallelisation has become of great relevance when coding. This work begins a new line of research on the study of the phenomenon of fouling in biomass combustion systems; however, this study is developed entirely in an Eulerian framework, guaranteeing a greater performance. The new full Eulerian-fouling model is based on the 3D-EBITCOM (3D Eulerian Biomass Transient Combustion Model) from the University of Vigo. The initial results are compared against experimental and previous modelling data obtained in an experimental burner, and they show an overall lower computational effort and better response in most scenarios.