Publication | Other papers | Potentiale, Bioenergiesysteme, Logistik

Model based control of a small-scale biomass boiler

Gölles M, Reiter S, Brunner T, Dourdoumas N, Obernberger I.

Published 2014

Citation: Gölles M, Reiter S, Brunner T, Dourdoumas N, Obernberger I. Model based control of a small-scale biomass boiler. Control Engineering Practice. 2014;22(1):94-102. https://doi.org/10.1016/j.conengprac.2013.09.012

Abstract

Because of increased efforts to reduce CO2 emissions a significant step in the development of small-scale (residential) biomass boilers for space heating has been achieved in recent years. Currently, the full potential for low-emission operation at high efficiencies, which is in principle possible due to optimized furnace geometries as well as combustion air staging strategies, cannot be exploited since there is still the need to enhance the controllers applied. For this reason, a model based control strategy for small-scale biomass boilers was developed and successfully implemented in a commercially available system. Thereby, appropriate mathematical models were developed for all relevant parts of the furnace and connected to an overall model subsequently used for the control unit design. The resulting controller is based on the input–output linearization and the state variables are estimated by an extended Kalman filter. Finally, the new control was implemented at a commercially available small-scale biomass boiler and the experimental verification showed a significant improvement of the operating behaviour in comparison to the conventional control.

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