Title:
CFD Simulation of a Burner for Syngas Characterization: Preliminary Results and Experimental Validation
Author(s):
D'Amico, M., Desideri, U., Fantozzi, F.
Document(s):
Paper
Abstract:
Biomass and Waste are distributed and renewable energy sources that may contribute effectively to sustainability if used on a small and micro scale. This requires the transformation through efficient technologies (gasification, pyrolysis and anaerobic digestion) into a suitable gaseous fuel to use in small internal combustion engines and gas turbines. The characterization of biomass derived syngases during combustion is therefore a key issue to improve the performance of small scale integrated plants because synthesis gas shows significant differences whith respect to Natural Gas (mixture of gases, low Calorific Value, hydrogen content, tar and particulate content) that may turn into ignition problems, combustion instabilities, difficulties in emission control and fouling. To this aim a burner for syngas combustion and LHV measurement through mass and energy balance was realized and connected to a rotary-kiln laboratory scale pyrolyzer at the Department of Industrial Engineering of the University of Perugia. A computational fluid dynamics (CFD) simulation of the burner was carried out to consider thermal inertias and heat transfer constraints and to investigate temperature and pressure distribution, and distribution of the combustion products and by products. The simulation was carried out using the CFD program Star-CCM+. Before the simulation a geometrical model of the burner was built and the volume of model was subdivided in cells. A sensibility analysis on the number of cells was carried out to estimate the approximation degree of the model. The model was validated with experimental data on propane combustion and the comparison between numerical results and experimental data provided useful information for following activities. The paper shows main results obtained during simulation with biomass pyrolysis syngas combustion in terms of heat transfer, emissions and heating value calculation. Preliminary comparison to selected experimental results are also provided.
Keywords:
analysis, low calorific value, pyrolysis, syngas
Topic:
Thermochemical conversion - Pyrolysis for power, CHP, polygeneration and chemicals
Subtopic:
Pyrolysis for power, CHP, polygeneration and chemicals
Event:
18th European Biomass Conference and Exhibition
Session:
VP2.3.34
Pages:
1063 - 1070
ISBN-13:
978-88-89407-56-1
ISBN-10:
88-89407-56-5
Paper DOI:
10.5071/18thEUBCE2010-VP2.3.34
Price:
FREE
