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Energies 2016, 9(9), 735; doi:10.3390/en9090735

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

Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, Aalto 00076, Finland
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Academic Editor: Tariq Al-Shemmeri
Received: 15 May 2016 / Revised: 29 July 2016 / Accepted: 19 August 2016 / Published: 10 September 2016
(This article belongs to the Special Issue Advances in Biomass for Energy Technology)
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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. View Full-Text
Keywords: biomass; combustion; mechanistic modeling; faster-than-real-time simulation; on-line computations biomass; combustion; mechanistic modeling; faster-than-real-time simulation; on-line computations
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Boriouchkine, A.; Jämsä-Jounela, S.-L. Simplification of a Mechanistic Model of Biomass Combustion for On-Line Computations. Energies 2016, 9, 735.

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