Artículo
Flexible heat exchanger network design of an ethanol processor for hydrogen production. A model-based multi-objective optimization approach
Fecha de publicación:
12/2016
Editorial:
Pergamon-Elsevier Science Ltd
Revista:
International Journal of Hydrogen Energy
ISSN:
0360-3199
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
This work addresses the optimal design of a flexible heat exchanger network using model-based optimization, applied to hydrogen production by means of an ethanol steam reforming process. High efficiencies are obtained at different hydrogen production levels ranging from 25 to 100% of a nominal output. System structure, heat exchanger sizing, and operation conditions are simultaneously settled, ensuring both operational feasibility and optimality. The system involves a reforming reactor, vaporization and reheating equipment, combustors, and a heat exchanger network system. A multi-period nonlinear optimization problem (NLP) was formulated to account for the production level distribution. Equipment sizing constraints and structural constraints link the different scenarios. The trade-off between area and efficiency is analyzed using a multi-objective epsilon-constraint approach. Models were developed in the GAMS environment. The resulting solutions, for the maximum area case, maintain alcohol combustion at low levels showing efficiencies around 63% in each operational level. Pareto Optimal diagram shows that a 1% reduction of efficiency allows a 50% decrease in total required heat exchanger area by 50%.
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Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Francesconi, Javier Andres; Oliva, Diego Gabriel; Aguirre, Pio Antonio; Flexible heat exchanger network design of an ethanol processor for hydrogen production. A model-based multi-objective optimization approach; Pergamon-Elsevier Science Ltd; International Journal of Hydrogen Energy; 42; 5; 12-2016; 2736-2747
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