Performance Prediction of a Transport Gasifier–Based IGCC System with Capture under Uncertainties
Publication: Journal of Energy Engineering
Volume 142, Issue 3
Abstract
In this study, a transport gasifier–based integrated gasification combined cycle (IGCC) with 90% capture rate was analyzed to predict possible net power output and net efficiency distributions in the system under uncertainties. Moreover, the influence of each parameter on the total model output uncertainty was quantified and displayed using Pareto charts. Uncertainties in parameters of the gasifier, Selexol- capture process, hydrogen-fueled gas turbine, compressors, steam turbines, and pumps were considered and quantitatively represented in uniform, triangle, or normal distributions. Monte Carlo simulation was adopted to propagate the parameters through process modeling. Results showed that the predicted median net plant efficiency of the system was 37.71% with a standard deviation of 0.41%. The unconverted carbon rate in the gasifier and the gas turbine combustor temperature (gtCMBT) exhibited the greatest effect on predicting uncertainties in efficiency and power output, respectively. Thus, future work should focus on reducing these parameter uncertainties. Comparisons are conducted between the transport gasifer–based system and the dry-feed entrained flow gasifier–based system with similar configuration. The results indicate that, even in the worst case scenario, IGCC with the oxygen-blown gasifier has a similar net efficiency to IGCC with the dry-feed entrained flow gasifier.
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Acknowledgments
The authors gratefully thank the financial support from Lianyungang Science and Technology Bureau through project CXY1325. We would also like to thank all our partners who participated in this project for their support and advice.
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Published In
Journal of Energy Engineering
Volume 142 • Issue 3 • September 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jan 26, 2015
Accepted: Jun 26, 2015
Published online: Aug 27, 2015
Discussion open until: Jan 27, 2016
Published in print: Sep 1, 2016
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