@inproceedings{KangwanpongpanKrautz, author = {Kangwanpongpan, Tanin and Krautz, Hans Joachim}, title = {Investigation of oxyfuel combustion by numerical simulation with different turbulent flow models}, language = {en} } @inproceedings{KangwanpongpanKrautz, author = {Kangwanpongpan, Tanin and Krautz, Hans Joachim}, title = {Numerical simulation of lignite combustion in O2/CO2 environment by Eddy-Dissipation Model}, series = {Verbrennung und Feuerung, Tagung Bochum, 16. und 17. September 2009, 24. Deutscher Flammentag}, booktitle = {Verbrennung und Feuerung, Tagung Bochum, 16. und 17. September 2009, 24. Deutscher Flammentag}, publisher = {VDI-Verlag}, address = {D{\"u}sseldorf}, isbn = {978-3-18-092056-6}, pages = {579 -- 582}, language = {en} } @inproceedings{CorreadaSilvaKangwanpongpanFindeisenetal., author = {Correa da Silva, Rodrigo and Kangwanpongpan, Tanin and Findeisen, Alexander and Krautz, Hans Joachim}, title = {Aspects of Numerical Simulation of Coal Combustion under Oxyfuel Atmospheres}, language = {de} } @misc{KangwanpongpanCorreadaSilvaKrautz, author = {Kangwanpongpan, Tanin and Correa da Silva, Rodrigo and Krautz, Hans Joachim}, title = {Prediction of oxy-coal combustion through an optimized weighted sum of gray gases model}, series = {Energy : the international journal}, volume = {41}, journal = {Energy : the international journal}, number = {1}, issn = {0360-5442}, doi = {10.1016/j.energy.2011.06.010}, pages = {244 -- 251}, language = {en} } @inproceedings{KangwanpongpanKlattKrautz, author = {Kangwanpongpan, Tanin and Klatt, Matthias and Krautz, Hans Joachim}, title = {Challenges of oxyfuel combustion modeling for carbon capture}, language = {en} } @misc{KangwanpongpanFrancaCorreadaSilvaetal., author = {Kangwanpongpan, Tanin and Franca, Francis H. R. and Correa da Silva, Rodrigo and Smith Schneider, Paulo and Krautz, Hans Joachim}, title = {New correlations for the weighted-sum-of-gray-gases model in oxy-fuel conditions based on HITEMP 2010 database}, series = {International Journal of Heat and Mass Transfer}, volume = {55}, journal = {International Journal of Heat and Mass Transfer}, number = {25-26}, issn = {0017-9310}, doi = {10.1016/j.ijheatmasstransfer.2012.07.032}, pages = {7419 -- 7433}, language = {en} } @inproceedings{KangwanpongpanNimtzKlattetal., author = {Kangwanpongpan, Tanin and Nimtz, Michael and Klatt, Matthias and Krautz, Hans Joachim}, title = {Numerical Investigations for Oxy-fuel Combustion in 0.4 MWth Pilot Scale Furnace}, series = {Geo-Energy International Conference}, booktitle = {Geo-Energy International Conference}, language = {en} } @misc{KrautzCorreadaSilvaKangwanpongpan, author = {Krautz, Hans Joachim and Corr{\^e}a da Silva, Rodrigo and Kangwanpongpan, Tanin}, title = {Flame pattern, temperatures and stability limits of pulverized oxy-coal combustion}, series = {Fuel : the science and technology of fuel and energy}, journal = {Fuel : the science and technology of fuel and energy}, number = {Vol. 115}, issn = {0016-2361}, doi = {10.1016/j.fuel.2013.07.049}, pages = {507 -- 520}, abstract = {The challenges in maintaining a stable oxy-coal flame have been reported in the open literature. In case of pulverized coal combustion, narrower flammable regimes arise not only of differences in the feed gas composition, but also due to changes in the flow dynamics because of reduced volume flow rate through the burners to match similar temperatures and radiative heat transfer within the furnace. The present work focuses on the study of flame structure and stability of pre-dried lignite fired by a staged feed-gas burner. Experimental runs were carried out in a 0.40 MWth laboratory facility, with the objective of investigating the effects of swirl strength and feed gas distribution in the burner registers. To assess the experimental data, a numerical study of the non-reacting flow in the near burner region is performed. Predicted flow pattern and flame images show that the primary fuel jet penetrates the internal recirculation zone, forming an annular doughnut reverse flow region for both firing conditions and resembling a type-1 flame pattern. Temperature measurements indicate that the feed gas distribution among the burner registers control the flame temperature in parallel with the swirl number in both air-fired and oxy-fired environments. The oxy-fuel cases exhibite markedly reduced temperatures on the flame axis. This difference in the core arises not just from the more pronounced penetration depth of the primary jet, but also due to reaction mechanisms including pyrolysis and gasification reactions at the higher concentrations of CO2 and water vapor. Flame stabilization is shown to be strongly dependent on an appropriate distribution of the feed gas and strength of swirling flow in the burner front. The results correlated in terms of swirl number, secondary/tertiary flow ratio and secondary/primary axial momentum point to similarities in the stability limits between air-firing and oxy-firing.}, language = {en} } @inproceedings{CorreadaSilvaKangwanpongpanFindeisenetal., author = {Correa da Silva, Rodrigo and Kangwanpongpan, Tanin and Findeisen, Alexander and Krautz, Hans Joachim}, title = {Description of a 0.4 MWth laboratory facility for oxy-fuel combustion studies}, language = {en} } @inproceedings{KangwanpongpanCorreadaSilvaTappeetal., author = {Kangwanpongpan, Tanin and Correa da Silva, Rodrigo and Tappe, Stephanie and Klatt, Matthias and Krautz, Hans Joachim}, title = {Numerical comparison of spectral non-gray gases modeling in a swirling Oxyfuel burner}, language = {de} } @inproceedings{KangwanpongpanCorreadaSilvaKrautz, author = {Kangwanpongpan, Tanin and Correa da Silva, Rodrigo and Krautz, Hans Joachim}, title = {Prediction of oxy-coal combustion through an optimized weighted sum of gray gases model}, language = {en} } @misc{CorreadaSilvaKangwanpongpanFindeisenetal., author = {Correa da Silva, Rodrigo and Kangwanpongpan, Tanin and Findeisen, Alexander and Krautz, Hans Joachim and Meyer, Marco and Roberg, Benedikt}, title = {Oxy-fuel Combustion Studies Applying a Novel Test Facility - First Numerical Results}, language = {en} }