Superestructura para el Diseño Óptimo de las Operaciones Fermentativas en la Obtención de Etanol
Cargando...
Fecha
Autores
Chirino Méndez, Raykel
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad Central "Marta Abreu" de Las Villas
Resumen
El presente trabajo aborda el procedimiento para la síntesis y diseño óptimo de las
operaciones de prefermentación y fermentación para la obtención de etanol, aplicando
los conceptos básicos de sistemas discontinuos, a partir del desarrollo de un novedoso
modelo de superestructura.
Primeramente se elabora un diagrama heurístico a partir de la revisión bibliográfica,
con los pasos a seguir para obtener los resultados esperados el diseño óptimo de
plantas discontinuas en general. Se propone el tipo de planta atendiendo a la estructura
de la producción, confirmando que el proceso en cuestión, visto como proceso
completo se comporta como una planta multipropósito secuencial. Se determina que
para estas etapas del proceso, la regla de transferencia que mejor se ajusta es la de
cero espera, debido a la necesidad de garantizar la calidad de estas operaciones, dado
su carácter microbiológico y a las características de los sustratos azucarados que
tienden a descomponerse en el tiempo.
A partir del modelo global propuesto se obtiene la configuración óptima de las etapas,
el número de equipos en cada etapa, el volumen de los equipos y el costo total de
producción óptimo. Dicho modelo global resultante aplica la programación no lineal
mezclada con enteros (MINLP), para lo cual se emplea el Software Profesional,
General Algebraic Modeling System (GAMS) versión 23.5 con la aplicación del Solver
CONOPT, en el cual se programan todos los balances, las restricciones y modelos.
Se obtiene la configuración óptima para las operaciones de prefermentación y
fermentación con un mínimo costo de producción y se comparan estos resultados con
las estructuras de destilerías convencionales. Se emiten recomendaciones para el
futuro desarrollo del tema abordado.
The present work is about the procedure for the synthesis and optimal design of prefermentation and fermentation operations to ethanol production, applying the basic concepts of batch systems, based on the development of a new superstructure model. First a heuristic diagram is developed from the results of the literature review, with the steps to follow the expected results the optimal design of batch plants. The plant type was proposes according with the production structure, confirming that this process, seen as complete process, behaves as a sequential jobshop plant. The zero wait is the best transfer rules for these stages, due to the need to ensure the quality of these operations, given its nature and the characteristics of microbiological sugary substrates tend to decompose over time. From the overall proposed model obtain the optimal configuration of the stages, the number of teams in each stage, the volume of equipment and optimal total production cost. This model applies the resulting global nonlinear programming mixed with integer (MINLP), which is used for the Professional Software, General Algebraic Modeling System (GAMS) version 23.5 with the application of CONOPT Solver, which are scheduled all balances, constraints and models. The optimal scheduling of prefermentation and fermentation stages was obtained with a minimum productions cost and this results was compared with the structures in conventional distillery. Recommendations are emitted for the future development of the approached topic.
The present work is about the procedure for the synthesis and optimal design of prefermentation and fermentation operations to ethanol production, applying the basic concepts of batch systems, based on the development of a new superstructure model. First a heuristic diagram is developed from the results of the literature review, with the steps to follow the expected results the optimal design of batch plants. The plant type was proposes according with the production structure, confirming that this process, seen as complete process, behaves as a sequential jobshop plant. The zero wait is the best transfer rules for these stages, due to the need to ensure the quality of these operations, given its nature and the characteristics of microbiological sugary substrates tend to decompose over time. From the overall proposed model obtain the optimal configuration of the stages, the number of teams in each stage, the volume of equipment and optimal total production cost. This model applies the resulting global nonlinear programming mixed with integer (MINLP), which is used for the Professional Software, General Algebraic Modeling System (GAMS) version 23.5 with the application of CONOPT Solver, which are scheduled all balances, constraints and models. The optimal scheduling of prefermentation and fermentation stages was obtained with a minimum productions cost and this results was compared with the structures in conventional distillery. Recommendations are emitted for the future development of the approached topic.