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Mecanismo de conductividad térmica de las superficies de cobre enfriadas con aceite basado en el enfoque de la
Yazhen Wang1, Shiting Jiang1, Jianjun Hou1
1College of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China.
Langmuir : the ACS journal of surfaces and colloids
|September 2, 2025
Resumen
La optimización de la disipación de calor en los tubos de TC implica la gestión de la resistencia térmica interfacial y la conductividad térmica del aceite. El aumento de la velocidad de flujo de aceite y el uso de nanotubos de carbono funcionalizados mejoran significativamente la eficiencia de enfriamiento.
Área de la Ciencia:
- Ciencias de los materiales
- Ingeniería térmica
- Física computacional
Sus antecedentes:
- Los sistemas de enfriamiento de aceite para tubos de tomografía computarizada se enfrentan a limitaciones debido a la resistencia térmica interfacial entre el cobre y el aceite, y la conductividad térmica inherente del aceite.
- La disipación eficiente del calor es crucial para el rendimiento y la longevidad de los sistemas de tubos de TC.
Objetivo del estudio:
- Investigar el impacto del caudal de aceite en el transporte de calor interfacial en tubos CT refrigerados por aceite.
- Evaluar el efecto de los nanotubos de carbono (CNT) en la conductividad térmica del aceite de refrigeración.
- Proporcionar orientación teórica para mejorar los equipos de refrigeración por líquidos y los compuestos de fluidos de alta conductividad térmica.
Principales métodos:
- Se emplearon simulaciones de dinámica molecular para analizar el transporte de calor interfacial.
- Se estudió la influencia de las diferentes velocidades de flujo del aceite en la resistencia térmica interfacial.
- Se examinó el efecto de los nanotubos de carbono funcionalizados en la conductividad térmica y la distribución del aceite.
Principales resultados:
- La resistencia térmica interfacial disminuyó con el aumento de la velocidad de flujo del aceite, con reducciones significativas observadas de hasta 4 m/s.
- Se observó un aumento notable de la resistencia térmica interfacial a una velocidad de movimiento del cobre de 1 m/s.
- Los nanotubos de carbono funcionalizados mejoraron sustancialmente la conductividad térmica del aceite, con mejoras de hasta el 101,98%, y mejoraron la distribución de CNT dentro del aceite.
Conclusiones:
- La optimización del caudal de aceite es fundamental para reducir la resistencia térmica interfacial en el enfriamiento del tubo de TC.
- Los nanotubos de carbono funcionalizados son efectivos para mejorar la conductividad térmica de los aceites de refrigeración.
- Los resultados ofrecen información valiosa para el desarrollo de soluciones avanzadas de refrigeración líquida y fluidos térmicos de alto rendimiento.
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