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Your search keyword '"Tellabide, Mikel"' showing total 29 results
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29 results on '"Tellabide, Mikel"'

10. Minimum spouting velocity of fine particles in fountain confined conical spouted beds using machine learning and least square fitting approaches.

Author

Moradkhani, Mohammad Amin, Miroliaei, Ali Reza, Ghasemi, Nasim, Hosseini, Seyyed Hossein, Tellabide, Mikel, and Olazar, Martin

Abstract

The present study concerns the development of new models to estimate the minimum spouting velocity (Ums) in various configurations of fountain‐confined conical spouted beds (FC‐CSBs) with fine particles. Existing literature correlations were found to be inaccurate for FC‐CSBs. Therefore, smart modelling techniques were employed to design more accurate predictive tools. The radial basis function (RBF) approach provided the best predictions for systems without draft tubes as well as those with open‐sided draft tubes. Additionally, the Gaussian process regression (GPR) approach yielded the best predictions for systems with nonporous draft tubes. The mean absolute percentage error (MAPE) values for the testing phase were 5.80%, 5.67%, and 5.59%, respectively. These models consider how bed shape and particle properties affect Ums. The sensitivity analysis was conducted to determine the factors with more importance in controlling Ums. Finally, simpler correlations were derived for Ums prediction in different FC‐CSB configurations, with accuracy around 12% error. [ABSTRACT FROM AUTHOR]

Published
2025
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25. Effect of locating the atomizer at the inlet in fountain confined conical spouted beds for drying kaolin suspensions.

Author

Sukunza, Xabier, Bolaños, Maider, Tellabide, Mikel, Estiati, Idoia, Aguado, Roberto, and Olazar, Martin

Subjects
ATOMIZERS, FOUNTAINS, KAOLIN, AIR ducts, PRESSURE drop (Fluid dynamics), INLETS
Abstract

The drying of suspensions in a spouted bed is usually performed by atomizing the solution onto the surface of the bed. However, drying of concentrated suspensions, such as those of kaolin, leads to particle agglomeration. Placing the atomizer at the air inlet pipe might be an alternative, since suspension droplets are fed into the spout, where high particle velocities are attained. Moreover, the presence of the fountain confiner above the bed surface allows increasing the air-solid contact. However, the atomizer may lead to bed instabilities due to changes in the air trajectory. Therefore, the spouted bed performance for drying kaolin suspensions with this new atomizer location has been addressed. Spouted bed hydrodynamics with and without atomizer were evaluated and drying experiments were conducted in this new setup. Although the atomizer increases the total pressure drop of the system, it hardly changes spouted bed hydrodynamics. Furthermore, the new setup allows operating at the maximum dryer's capacity. [ABSTRACT FROM AUTHOR]

Published
2024
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29. Modelling batch drying of fine sand in a fountain confined conical spouted bed

Author

Ministerio de Educación, Cultura y Deporte, Ministerio de Economía y Competitividad, Pablos, Aitor, Tellabide, Mikel, Estiati, I., Vicente, Jorge, Aguado, Roberto, Olazar, Martin, Ministerio de Educación, Cultura y Deporte, Ministerio de Economía y Competitividad, Pablos, Aitor, Tellabide, Mikel, Estiati, I., Vicente, Jorge, Aguado, Roberto, and Olazar, Martin

Abstract

[EN] A rigorous model based on hydrodynamic considerations and mass and energy balances has been proposed for batch drying of fine sand in a fountain confined conical spouted bed. The results show that the proposed model predicts acceptably the evolution with time of moisture content in the solid and the final moisture content for the different operating conditions, with the mass transfer coefficient being the only adjustable parameter.

Published
2018

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