2.2.2 - In-situ high temperature CO/HC gas sensors for optimization of the firewood combustion in low-power fireplaces
- 18. GMA/ITG-Fachtagung Sensoren und Messsysteme 2016
2016-05-10 - 2016-05-11
- 2.2 Gassensoren für raue Umgebungsatmosphären
- B. Ojha, N. Illyaskutty, J. Knoblauch, M. Balachandran, H. Kohler - Karlsruhe University of Applied Sciences, Karlsruhe (Germany)
- 118 - 125
In this paper, the combustion and emission situations of batch wise firewood fueled fireplaces is discussed. Difference in CO-emissions of a hand operated and automatically air stream controlled firewood combustion process is illustrated. An air stream control algorithm is introduced which directs all phases of the firing process: ignition, high temperature and burn out phase. The combustion air stream control concept is based on motor driven shutters combined with air mass stream sensors and on flue gas analysis by sensors for combustion temperature, residual oxygen concentration (ROC) and residual un- or partly combusted pyrolysis gas components (CO/HC) Different commercially available high temperature CO/HC sensors along with an indigenously developed metal oxide (MOG) sensor array are evaluated in batch firing experiments with reference to the data sampled by a HTFTIR analysis system. Finally, the signal stability of the sensors was investigated by repeated exposure to CO/air gas mixtures.