INGAR   05399
INSTITUTO DE DESARROLLO Y DISEÑO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Simultaneous flowsheet optimization and heat integration of a bioethanol processor for PEM fuel cell system
Autor/es:
JAVIER A. FRANCESCONI; DIEGO G. OLIVA; MIGUEL C. MUSSATI; PIO A. AGUIRRE
Lugar:
Salvador, Bahia, Brazil
Reunión:
Simposio; 10th International Symposium on Process Systems Engineering - PSE2009; 2009
Institución organizadora:
Universidad de Sao Paulo
Resumen:
The conceptual design of a bioethanol processor for fuel cell applications with heat
integration was analyzed via model-based optimization formulation. Basically, the
system consists of steam reforming of bioethanol and hydrogen purification process that
are coupled to a proton electrolyte membrane fuel cell (PEMFC). The system was
implemented within General Algebraic Modeling System (GAMS). The model
simultaneously handles the problem of optimal heat integration while performing the
optimization of process flowsheet. A 50 kW power generation system is presented as
case study; the objective was to obtain the operative conditions for the process units that
maximize the system efficiency. The operating variables of the system considered as
decision variables were: system pressure, water-ethanol molar ratio and reforming
temperature, input temperatures to hydrogen purification reactors, fuel cell temperature,
and fuel cell hydrogen and oxygen utilizations. The results obtained predict a global
efficiency of 43%, about 5% higher than the reference case. These results demonstrate
the importance of simultaneous optimal heat integration for fuel cell-based processes.