Due to its natural or controlled regeneration and spreading, wood represents the main source to produce biomass energy. By means of its calorific value, wood biomass is recommended to obtain energy by direct burning or other processes. Lately, technologies have been developed to ensure the production of pellets or briquettes based on wood biomass. It is necessary to study how these pellets behave when being subjected to a heating process, furthermore it is necessary to determine how the temperature develops along a segment of pellets. To make this possible, a heat transfer simulation model will be used based on two or more thermal simulation models. After entering all constants necessary to initialize and run the code in Matlab, the temperature variation diagram will be obtained according to two ideal energy sources that actually constitute the heat sources to which the pellets or their segments are subjected. The results obtained allow to determine the temperature values at which the pellet material is stabilized before it is subjected to combustion.
The use of woody biomass is becoming more and more important as a renewable energy source. The context of developing long-lasting and resilient technologies is also linked to the reduction of harmful substances released environment. These two goals are contradictory. The burning process of combustible wood biomass will be modeled in this paper. It is known that it can be converted by various technological processes so as to obtain gas, liquid or solid fuel on the one hand as well as chemical derivatives on the other. Modeling the process occurring within the combustion can be used to study the processes of used installations which may include thermo-chemical reactors such as those for pyrolysis, burners, incinerators, gasifiers etc. The main goal, pursued by modeling, is to determine the efficiency of the combustion process compared to other more classical methods. This study will use CFD (Computational Fluid Dynamics) modeling, based on numerical simulation. CFD modeling allows the physical and chemical properties of biomass in the reactor to be quantified based on a set of parameters of the working environment, depending on the biomass material parameters implementation. The interpretation of the obtained results allows the analysis of the biomass energy generation conditions so that we can understand and then optimize the dynamics of the processes inside the reactors.
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