Study on performance of the ball packed-bed regenerator: experiments and simulation

Yu, Jiang; Zhang, Mingchuan; Fan, Weidong; Zhou, Yuegui; Zhao, Guofeng

doi:10.1016/s1359-4311(01)00116-8

Cited by 46 publications

(21 citation statements)

References 9 publications

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“…34 with those by the Ergun equation Eq. 35 and the experimental data (Yu and Zhang 2002), which were measured for beds packed with spherical particles of D p = 12 mm at ε = 0.364, In Fig. 8, the calculations of Eq.…”

Section: Comparisons and Discussionmentioning

confidence: 99%

A resistance model for flow through porous media

Yun

2007

Transp Porous Med

108

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A new model for resistance of flow through granular porous media is developed based on the average hydraulic radius model and the contracting-expanding channel model. This model is expressed as a function of tortuosity, porosity, ratio of pore diameter to throat diameter, diameter of particles, and fluid properties. The two empirical constants, 150 and 1.75, in the Ergun equation are replaced by two expressions, which are explicitly related to the pore geometry. Every parameter in the proposed model has clear physical meaning. The proposed model is shown to be more fundamental and reasonable than the Ergum equation. The model predictions are in good agreement with the existing experimental data.

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Section: Comparisons and Discussionmentioning

confidence: 99%

A resistance model for flow through porous media

Yun

2007

Transp Porous Med

108

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“…Packed beds are widely used in chemical catalytic reactors and heat exchangers due to their high potential for heat and mass transfer enhancement (Martin 1978;Nemec and Levec 2005;Yu et al 2002). To design a packed bed, the better understanding of the fluid flow characteristics in a packed bed is required.…”

Section: Introductionmentioning

confidence: 99%

A Semi-empirical Correlation for Pressure Drop in Packed Beds of Spherical Particles

Choi

Kim

2008

Transp Porous Med

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The effect of a confining wall on the pressure drop of fluid flow through packed beds of spherical particles with small bed-to-particle diameter ratios was investigated to develop an improved pressure drop correlation. The dependency of pressure loss on both wall friction and increased porosity near the wall was accounted for by using a theoretical approach. A semi-empirical model was created based upon the capillary-orifice model, which included a wall correction factor for the inertial pressure loss. In this model, packed beds were treated as a bundle of capillary tubes whose orifice diameter in the core region was different from that of the wall region. Using this model, a new pressure drop correlation was obtained, based on the Ergun equation and applicable for a wide range of Reynolds numbers (10 −2 −10 3 ). The proposed correlation was compared with previous correlations, as well as with experimental data. This correlation showed close agreement with the experimental data for both low-and high-Reynolds number regimes and for a wide range of bed-to-particle diameter ratios. The ratio of the pressure drop in finite packing to that in homogeneous packing was then calculated. This ratio clearly shows how the wall effect depends on the Reynolds number and the bed-to-particle diameter ratio.Keywords Packed beds · Porous media · Pressure drop · Wall effect · Particle Notation C d Discharge coefficient of an orifice C D Drag coefficient of an orifice plate C w

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“…Estos sistemas regenerativos compactos poseen una efectividad cercana al 90%, alcanzando altos niveles de precalentamiento del aire que pueden estar en un 85% de la temperatura del proceso, mejorando la uniformidad de la temperatura en el horno, incrementando la productividad y ahorrando cantidades considerables de combustible (Yu, 2002).…”

Section: Combustión Con Exceso De Entalpíaunclassified

Combustión con exceso de entalpía

Copete-López

2008

TecnoL.

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ResumenEn este trabajo se realiza una revisión del tema relacionado con las características de la combustión utilizando aire normal altamente precalentado. La tecnología se ha utilizado en los últi-mos años para proporcionar un aumento en la eficiencia térmica y una disminución significativa en el consumo de combustible y emisiones contaminantes respecto a los sistemas de combustión convencionales. Se presenta el concepto de combustión con exceso de entalpía, las principales propiedades de combustión que se afectan por el precalentamiento de los reactivos, los sistemas más utilizados para precalentar el aire, las ventajas y desventajas de esta tecnología y se describen algunas técnicas computacionales empleadas para el estudio de este tipo de combustión. Palabras claveExceso de entalpía, aire precalentado, recuperación de calor. AbstractThis work is a review of the characteristics of the combustion using highly preheated normal air. The technology has been used in the last years to provide an increase in the thermal efficiency and a significant decrease in the consumption of fuel and polluting emissions regarding the conventional combustion systems.

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Study on performance of the ball packed-bed regenerator: experiments and simulation

Cited by 46 publications

References 9 publications

A resistance model for flow through porous media

A resistance model for flow through porous media

A Semi-empirical Correlation for Pressure Drop in Packed Beds of Spherical Particles

Combustión con exceso de entalpía

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