Estudio de la influencia de las propiedades del material en el proceso de conversión de energía de generadores termoeléctricos para aplicaciones de recuperación de calor

Study of the influence of material properties in the energy conversion process of thermoelectric generators for waste heat recovery applications

Contenido principal del artículo

Byron Medina-Delgado
Resumen

En el presente estudio, se propone un análisis del efecto de las propiedades del material en el proceso de conversión de energía de generadores termoeléctricos (GTE). En el desarrollo del estudio, se analizaron dos materiales cuyas propiedades varían con respecto a la temperatura (Bi0.4Sb1.6Te3 y Cu11NiSb4S13) y un material de propiedades constantes (Bi2Te3). A través del proceso de simulación, cada material se sometió a variaciones de temperatura para monitorear su efecto en variables tales como la generación eléctrica, flujo de calor y eficiencia de conversión energética. Los resultados obtenidos mostraron que, al considerar la dependencia de la temperatura del material se obtienen estimaciones mayores o menores dependiendo en el nivel de temperatura experimentado por el GTE. De manera general, el material Bi2Te3 incrementó la generación de electricidad y la eficiencia hasta en un 35 % comparado al material Bi0.4Sb1.6Te3. De tal forma, se demostró que considerando la variabilidad del material del GTE es esencial para obtener resultados realistas del proceso de conversión energético. Por otro lado, el flujo de calor producido por el efecto de Fourier mostró el mayor impacto en la generación de electricidad del GTE. Dentro de los materiales con propiedades variables, el material Bi0.4Sb1.6Te3 incrementó la eficiencia de conversión hasta en un 25% en comparación con el Cu11NiSb4S13. Finalmente, el estudio de las propiedades de los materiales para la construcción de GTEs usando simulaciones numéricas demostró ser una herramienta robusta y práctica para evaluar el desempeño de este dispositivo.

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