Simplification of a Mechanistic Model of Biomass Combustion for On-Line Computations

Alexandre Boriouchkine and Sirkka-Liisa Jämsä-Jounela
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Alexandre Boriouchkine: Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, Aalto 00076, Finland
Sirkka-Liisa Jämsä-Jounela: Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, Aalto 00076, Finland

Energies, 2016, vol. 9, issue 9, 1-25

Abstract: Increasing utilization of intermittent energy resources requires flexibility from energy boilers which can be achieved with advanced control methods employing dynamic process models. The performance of the model-based control methods depends on the ability of the underlying model to describe combustion phenomena under varying power demand. This paper presents an approach to the simplification of a mechanistic model developed for combustion phenomena investigation. The aim of the approach is to simplify the dynamic model of biomass combustion for applications requiring fast computational times while retaining the ability of the model to describe the underlying combustion phenomena. The approach for that comprises three phases. In the first phase, the main mechanisms of heat and mass transfer and limiting factors of the reactions are identified in each zone. In the second phase, each of the partial differential equations from the full scale model are reduced to a number of ordinary differential equations (ODEs) defining the overall balances of the zones. In the last phase, mathematical equations are formulated based on the mass and energy balances formed in the previous step. The simplified model for online computations was successfully built and validated against industrial data.

Keywords: biomass; combustion; mechanistic modeling; faster-than-real-time simulation; on-line computations (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: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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