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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
INTERCHANGEABILITY OF FUELS IN A PREMIXED RADIANT WALL BURNER – A CFD APPROACH
Submission Author:
Rodolpho Marques , SP
Co-Authors:
Rodolpho Marques, Laiete Soto Messias, Lea Soledar dos Santos
Presenter: Rodolpho Marques
doi://10.26678/ABCM.ENCIT2020.CIT20-0086
Abstract
Premixed venturi burners are commonly encountered in refineries where different process gases can be used as fuel in furnaces to avoid flaring them. With a huge range of fuel compositions, the interchangeability is an important point to be evaluated. This case study presents a fuel interchangeability analysis in a premixed burner using two approaches: Wobbe Index and CFD (Computational Fluid Dynamics) modelling. Analysis with Wobbe Index are very simple and a quick way to get an answer for the interchangeability capacity on a burner, however due to its simplicity it cannot be done any inference about strategies to make the interchangeability feasible. Then, equipment modifications are proposed and tested by CFD using an Open Source Software (OpenFOAM). The model is validated by experimental data and then it was applied to predict new conditions, varying geometry of fuel nozzle with an evaluation of the limiting effect of burner geometry and, thus, it was concluded wall roughness restricted the possibility of interchangeability.
Keywords
Premix, CFD, burner, Wobbe Index, OpenFOAM
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