Caractérisation et optimisation de la combustion de bois fragmenté en chaufferies automatiques

Abstract : The development of automatic fed boilers using broken wood follows an upward trend nowadays. These boilers have to fulfil the heating needs despite the heterogeneity of wood. The boiler has to fit its power and allow the use of wood which size and humidity may fluctuate. Our study uses an automatic fed boiler with moving grates of 200 kW. 1000 hours of combustion experiments with sawdust and chips, with different moistures varying according to 3 stages of power enable to achieve a representation of CO emitted from combustion depending on the humidity, the power and the air flow. This model allows to assess the environmental impact of different types of combustion regulations. A new logic of regulation has been then proposed : it enables to reduce up to 40% of the total CO emissions by a simple re-programming of the automaton and works whatever the wood characteristics or the demanded power.
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Claude Bernard. Caractérisation et optimisation de la combustion de bois fragmenté en chaufferies automatiques. Sciences de la Terre. Université Henri Poincaré - Nancy 1, 2005. Français. ⟨NNT : 2005NAN10206⟩. ⟨tel-01747449⟩

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