TY - JOUR
T1 - Thermodynamic predictions of performance of a bagasse integrated gasification combined cycle under quasi-equilibrium conditions
AU - Arteaga-Pérez, Luis E.
AU - Casas-Ledón, Yannay
AU - Prins, Wolter
AU - Radovic, Ljubisa
N1 - Funding Information:
We acknowledge the contribution of editor and anonymous referees. Preparation of this paper has been financially supported by Project Basal UDT PFB-27 of the Unidad de Desarrollo Tecnológico – Universidad de Concepción , Chile.
PY - 2014/12/15
Y1 - 2014/12/15
N2 - The objective of this study was to develop a comprehensive mathematical model of bagasse gasification integrated with a gas turbine combined cycle (BIGCC). The model uses a quasi-equilibrium approach to evaluate the thermodynamic performance of the plant, considering both first and the second law of thermodynamics. The influence of pressure ratio in the compressor (1:4. <. rp<. 1:10) and of the gas turbine inlet temperature (1000. K. <. TiT<. 1400. K) on system efficiencies is explored. The exergy destruction, losses and recovery in the heat exchanger network are analyzed using pinch methodology. A 46.5% exergy saving by recovering heat in the steam cycle and drying stage can be achieved. Best results are obtained when the turbine inlet temperature is 1323. K and for a 1:10 cycle compression ratio: under these conditions the total exergy efficiency is 32.3% and 35.4% energy efficiency. The atmospheric pressure gasifier was operated at 72% hot gas efficiency and 1073. K. Major exergy destruction occur in the gasifier, dryer and heat exchanger network with a combined 94% of total losses.
AB - The objective of this study was to develop a comprehensive mathematical model of bagasse gasification integrated with a gas turbine combined cycle (BIGCC). The model uses a quasi-equilibrium approach to evaluate the thermodynamic performance of the plant, considering both first and the second law of thermodynamics. The influence of pressure ratio in the compressor (1:4. <. rp<. 1:10) and of the gas turbine inlet temperature (1000. K. <. TiT<. 1400. K) on system efficiencies is explored. The exergy destruction, losses and recovery in the heat exchanger network are analyzed using pinch methodology. A 46.5% exergy saving by recovering heat in the steam cycle and drying stage can be achieved. Best results are obtained when the turbine inlet temperature is 1323. K and for a 1:10 cycle compression ratio: under these conditions the total exergy efficiency is 32.3% and 35.4% energy efficiency. The atmospheric pressure gasifier was operated at 72% hot gas efficiency and 1073. K. Major exergy destruction occur in the gasifier, dryer and heat exchanger network with a combined 94% of total losses.
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U2 - 10.1016/j.cej.2014.07.104
DO - 10.1016/j.cej.2014.07.104
M3 - Article
AN - SCOPUS:84906070926
SN - 1385-8947
VL - 258
SP - 402
EP - 411
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -
