Publication | Other papers | Potentiale, Bioenergiesysteme, Logistik

Challenges toward model-based control for hybrid biomass-based heating systems

Unterberger V, Gölles M

Published November 2015

Citation: Unterberger V, Gölles M. Challenges toward model-based control for hybrid biomass-based heating systems. e-nova 2015. November 2015, Pinkafeld, Austria. Unterberger V, Gölles M. Challenges toward model-based control for hybrid biomass-based heating systems. Nachhaltige Gebäude, Graz. Leykam. 2015;10:393-404.

Abstract

Biomass boilers used for residential heating and hot water supply are typically combined with a buffer storage and solar collectors. However, the annual utilization rates typically achieved with such systems are far below those theoretically possible, which is mainly because of the often poor quality of both the individual control of the components as well as the high-level control of the entire system. The control strategies typically applied consist of simple decou-pled control circuits with linear controllers, which cannot deal with the mostly nonlinear and coupled behaviour of the components and thus do not ensure their reasonable interaction. The most appropriate approach to address these challenges is the application of model-based control techniques. Within the paper an overview of mathematical models suitable for control purposes, a simple to implement load forecasting method as well as control strate-gies for both the individual components and the entire system are presented. Future chal-lenges for a practical implementation of this novel approach are discussed in the outlook sec-tion.


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