Dynamics and emission of nearly flameless combustion of waste cooking oil biodiesel in an ultra-low emission non-MILD swirl burner

•Nearly flameless non-MILD combustion of neat biodiesel was demonstrated.•Current emission limitations were fulfilled by more than a 70% margin.•Sound pressure level depended on the flame shape, not on the fuel type.•Overall sound pressure level was 8 and 10 dB lower than V and straight flames.•Chem...

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Bibliographic Details
Published in:Fuel (Guildford) 2022-07, Vol.319, p.123743, Article 123743
Main Authors: Józsa, Viktor, Hidegh, Gyöngyvér Tóthpálné, Csemány, Dávid, Kardos, Réka Anna, Chong, Cheng Tung
Format: Article
Language:English
Subjects:
Biodiesel fuels
Biofuels
Chemiluminescence
Combustion
Combustion chambers
Cooking
Cooking oils
Diesel
Emission
Emissions
Exhaust gases
Flameless
Gas turbines
NOx
Oil wastes
Photomultiplier tubes
Sound pressure
Swirl
Waste cooking oil
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Summary:•Nearly flameless non-MILD combustion of neat biodiesel was demonstrated.•Current emission limitations were fulfilled by more than a 70% margin.•Sound pressure level depended on the flame shape, not on the fuel type.•Overall sound pressure level was 8 and 10 dB lower than V and straight flames.•Chemiluminescence intensity level showed no thermoacoustic coupling. The ongoing energy revolution demands a drastic change in energy carriers used, which especially stresses the industry and transportation, where combustion seems to have no generally feasible alternative. Consequently, both advanced combustion systems with ultra-low emission and high fuel flexibility are essential to mitigate the problems. The Mixture Temperature-Controlled (MTC) combustion concept can potentially fill this gap, developed by our research group. It features no exhaust gas recirculation, and the internal recirculation rate is low compared to flameless combustion chambers. It was demonstrated that the MTC burner could utilize even neat waste cooking oil biodiesel at nearly flameless combustion conditions. The resulting 
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2022.123743