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  4. Development of a New Sensor Module for an Enhanced Fuel Flexible Operation of Biomass Boilers
 
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2021
Journal Article
Title

Development of a New Sensor Module for an Enhanced Fuel Flexible Operation of Biomass Boilers

Abstract
The heterogeneity of biogenic fuels, and especially biogenic residues with regard to water and ash content, particle size and particle size distribution is challenging for biomass combustion, and limits fuel flexibility. Online fuel characterization as a part of process control could help too ptimize combustion processes, increase fuel flexibility and reduce emissions. In this research article, a concept for a new sensor module is presented and first tests are displayed to show its feasibility. The concept is based on the principle of hot air convective drying. The idea is to pass warm air with 90 °C through a bulk of fuel like wood chips and measure different characteristics such as moisture, temperatures and pressure drop over the bulk material as a function over time. These functions are the basis to draw conclusions and estimate relevant fuel properties. To achieve this goal, a test rig with a volume of 0.038 m3 was set up in the laboratory and a series of tests was performed with different fuels (wood chips, saw dust, wood pellets, residues from forestry, corncobs and biochar). Further tests were carried out with conditioned fuels with defined water and fines contents. The experiments show that characteristic functions arise over time. The central task for the future will be to assign these functions to specific fuel characteristics. Based on the data, the concept for a software for an automated, data‐based fuel detection system was designed.
Author(s)
Meiller, Martin  orcid-logo
Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT  
Oischinger, Jürgen  orcid-logo
Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT  
Daschner, Robert  
Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT  
Hornung, Andreas  orcid-logo
Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT  
Journal
Processes  
Funder
Bundesministerium für Ernährung und Landwirtschaft BMEL (Deutschland)  
Open Access
DOI
10.24406/publica-r-266817
10.3390/pr9040661
File(s)
N-633923.pdf (34.56 MB)
Rights
CC BY 4.0: Creative Commons Attribution
Language
English
Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT  
Keyword(s)
  • online fuel detection

  • biomass combustion online

  • biomass furnace

  • fuel flexibility

  • biogenic residues

  • fuel characterization

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