Determinación del número de cetano del Biodiesel a partir de su composición de ácidos grasos utilizando regresión lineal múltiple y redes neuronales artificiales
Descripción
Instituto Superior Politécnico “José Antonio Echeverría” Facultad de Ingeniería Mecánica Centro de Estudio de Tecnologías Energéticas Renovables (CETER)
Tesis Presentada en Opción al Título Académico de Máster en Ingeniería Mecánica
Determinación del número de cetano del Biodiesel a partir de su composición de ácidos grasos utilizando regresión lineal múltiple y redes neuronales artificiales
Autor: Ing. Yisel Sánchez Borroto Tutor: Dr. Ramón Piloto Rodríguez
La Habana, Cuba 2014
Resumen El número de cetano (CN) es una de las propiedades más importantes para evaluar la calidad del proceso de combustión de un combustible tipo diésel. El CN de biocombustibles derivados de aceites vegetales está influenciado por su composición de ácidos grasos. El objetivo de esta investigación es obtener modelos físico-matemáticos que establezcan una relación entre el número de cetano de biocombustibles derivados de aceites vegetales y su composición de ácidos grasos esenciales. Para predecir el CN del biodiesel se desarrolló un modelo matemático mediante un análisis de regresión lineal múltiple y de redes neuronales artificiales. El ajuste de los coeficientes del modelo de regresión se basa en la obtención de residuales mínimos. Para la obtención del modelo de redes neuronales fueron evaluadas 60 redes, utilizando dos topologías y diferentes algoritmos para la segunda etapa de entrenamiento. El modelo obtenido usando regresión fue comparado con un modelo encontrado en la literatura. Los modelos obtenidos por redes y regresión fueron comparados entre sí, obteniéndose como resultado que el modelo por redes neuronales es mejor para predecir el número de cetano que el obtenido por regresión. A partir de estos resultados queda establecida una herramienta muy útil para la determinación del número de cetano. Referencias Bibliográficas 1. 2. 3. 4. 5. 6.
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