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Effect of Temperature on a Vortex Reactor for Hydrodynamic Cavitation
Efecto de la temperatura en un reactor vórtice para cavitación hidrodinámica
DOI:
https://doi.org/10.15446/ing.investig.93419Keywords:
Computational fluid dynamics, hydrodynamic cavitation, heavy crude oil (en)Mecánica de fluidos computacional, cavitación hidrodinámica, petróleo pesado (es)
The oil and gas sector has recently shown an interest in hydrodynamic cavitation for oil enhancement, as it allows reducing transportation and refinement costs. This work presents a fluid-dynamic study of Colombian oil at different temperatures passing through a vortex reactor. First, an experimental design was elaborated, establishing the temperature and quantity of the injected hydrogen donor as factors and the final viscosity of oil as the response. Then, a numerical model was developed in the Ansys Fluent software using multiphase models, where the required properties of the fluid were obtained via laboratory tests and the Aspen HYSYS software. The results obtained from numerical experimentation were analyzed, and it was observed that the final viscosity was less affected by the temperature than by the hydrogen donor. Moreover, numerical modeling showed an exponential relation between vapor generation and temperature. The experimental and numerical data were compared, and it was found that the temperatures established in the experimental design were not high enough to generate a significant amount of vapor, which is why the decrease in viscosity was lower.
Últimamente, el sector de petróleo y gas ha mostrado interés en la cavitación hidrodinámica para la mejora del petróleo, ya que esta permite reducir los costos de transporte y refinamiento. Este trabajo presenta un estudio fluidodinámico de petróleo colombiano a diferentes temperaturas mientras pasa por un reactor vórtice. Primero se realizó un diseño experimental, estableciendo la temperatura y la cantidad de donante de hidrógeno inyectado como factores y la viscosidad final del aceite como respuesta. Luego se desarrolló un modelo numérico en el software Ansys Fluent utilizando modelos multifase, donde se obtuvieron las propiedades requeridas del fluido mediante pruebas de laboratorio y el software Aspen HYSYS. Se analizaron los resultados de la experimentación numérica y se observó que la viscosidad final se vio menos afectada por la temperatura que por el donante de hidrógeno. Asimismo, el modelado numérico mostró una relación exponencial entre la generación de vapor y la temperatura. Se compararon los datos experimentales y numéricos, y se encontró que las temperaturas establecidas en el diseño experimental no eran lo suficientemente altas para generar una cantidad significativa de vapor, por lo que la reducción de la viscosidad fue menor.
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Copyright (c) 2022 Octavio Andrés González-Estrada, Mauricio Andrés Rojas Nova, Germán González Silva
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