Análisis exergético de un sistema integrado de motor de combustible dual, electrolizador PEM y generador termoeléctrico

Publicado

2020-11-05

Exergetic analysis of a dual-fuel engine, PEM electrolyzer and thermoelectric generator integrated system

Análisis exergético de un sistema integrado de motor de combustible dual, electrolizador PEM y generador termoeléctrico

Palabras clave:

Exergetic analysis, diesel engine, electrolyzer, hybrid systems, thermoelectric generator. (en)
Análisis exergético, motor diesel, electrolizador, sistemas híbridos, generador termoeléctrico. (es)

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Autores/as

Nelly De Armas Calderón Universidad del Atlántico https://orcid.org/0000-0002-1640-5921
Cristina Lizarazo Bohórquez Universidad del Atlántico https://orcid.org/0000-0001-8387-0359
Jorge Duarte Forero Universidad del Atlántico https://orcid.org/0000-0001-7345-9590

Resumen (en)
Resumen (es)

In this research, the implementation of an integrated system composed of a dual-fuel engine (Diesel-Hydrogen), a PEM electrolyzer and a thermoelectric generator is envisioned. In order to know the optimal operating conditions of each sub-system, the exergetic efficiency and destroyed exergy were studied. It was estimated that for the dual combustion engine, the destroyed exergy would increase as a function of the concentration of methane in its mixture. By varying the electrical input to the electrolyzer, it was found that when the input current was 2A, the exergetic efficiency would go up to 92.59%, while for a current of 5A, the efficiency decreased in 51.80%. Finally, the exergetic efficiency of TEG decreased by increasing the hot flow temperature; 86.68% of the decrease in efficiency occurred for temperatures between 470K and 510K. On the other hand, the destroyed exergy increased linearly with an increase in the inlet temperature of exhaust gases.

En el presente artículo proyecta la implementación de un sistema integrado compuesto por un motor de combustión dual (Diesel-Hidrógeno), un electrolizador tipo PEM y un termogenerador eléctrico. En aras de conocer las condiciones óptimas de funcionamiento de cada subsistema se estudió la eficiencia exergética y la exergía destruída. Se estimó que para el motor combustión dual, la exergía destruída incrementa en función de la concentración de metano en su mezcla. Al variar la potencia eléctrica de entrada al electrolizador se encontró que cuando la corriente de entrada es de 2 A, su eficiencia exergética puede ser hasta 92.59 %, mientras que para una corriente de 5 A, la eficiencia disminuye un 51.80 %. Finalmente, la eficiencia exergética del TEG disminuyó con el aumento de la temperatura del flujo caliente, el 86.68 % del decrecimiento de eficiencia se dio en temperaturas entre 470 K a 510 K. En cambio, la exergía destruida incrementó linealmente al aumentar la temperatura de entrada de los gases de escape.

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