Experimental and Numerical Investigation of a MILD Combustion Chamber for Micro Gas Turbine Applications

Valentina Fortunato, Andreas Giraldo, Mehdi Rouabah, Rabia Nacereddine, Michel Delanaye and Alessandro Parente
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Valentina Fortunato: Aero-Thermo-Mecanics Laboratory, École Polytechnique de Bruxelles, Université Libre de Bruxelles, 1050 Bruxelles, Belgium
Andreas Giraldo: MITIS SA, 4000 Liège, Belgium
Mehdi Rouabah: Aero-Thermo-Mecanics Laboratory, École Polytechnique de Bruxelles, Université Libre de Bruxelles, 1050 Bruxelles, Belgium
Rabia Nacereddine: MITIS SA, 4000 Liège, Belgium
Michel Delanaye: MITIS SA, 4000 Liège, Belgium
Alessandro Parente: Aero-Thermo-Mecanics Laboratory, École Polytechnique de Bruxelles, Université Libre de Bruxelles, 1050 Bruxelles, Belgium

Energies, 2018, vol. 11, issue 12, 1-21

Abstract: In the field of energy production, cogeneration systems based on micro gas turbine cycles appear particularly suitable to reach the goals of improving efficiency and reducing pollutants. Moderate and Intense Low-Oxygen Dilution (MILD) combustion represents a promising technology to increase efficiency and to further reduce the emissions of those systems. The present work aims at describing the behavior of a combustion chamber for a micro gas turbine operating in MILD regime. The performances of the combustion chamber are discussed for two cases: methane and biogas combustion. The combustor performed very well in terms of emissions, especially CO and NO x , for various air inlet temperatures and air-to-fuel ratios, proving the benefits of MILD combustion. The chamber proved to be fuel flexible, since both ignition and stable combustion could be achieved by also burning biogas. Finally, the numerical model used to design the combustor was validated against the experimental data collected. The model performs quite well both for methane and biogas. In particular, for methane the Partially Stirred Reactor (PaSR) combustion model proved to be the best choice to predict both minor species, such as CO, more accurately and cases with lower reactivity that were not possible to model using the Eddy Dissipation Concept (EDC). For the biogas, the most appropriate kinetic mechanism to properly model the behavior of the chamber was selected.

Keywords: MILD combustion; fuel flexibility; NOx emissions; combustion model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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