Heat Transfer and Pressure Drops in a Helical Flow Channel Liquid/Solid Fluidized Bed

Oscar García-Aranda, Christopher Heard (), José Javier Valencia-López and Francisco Javier Solorio-Ordaz
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Oscar García-Aranda: División de Ciencias Naturales e Ingeniería, Universidad Autónoma Metropolitana Unidad Cuajimalpa, Ciudad de México 05348, Mexico
Christopher Heard: Departamento de Teoría y Procesos de Diseño, DCCD, Universidad Autónoma Metropolitana Unidad Cuajimalpa, Ciudad de México 05348, Mexico
José Javier Valencia-López: Departamento de Procesos y Tecnología, DCNI, Universidad Autónoma Metropolitana Unidad Cuajimalpa, Ciudad de México 05348, Mexico
Francisco Javier Solorio-Ordaz: División de Ingeniería Mecánica e Industrial, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico

Energies, 2022, vol. 15, issue 23, 1-13

Abstract: Industrial liquid/solid fluidized bed heat exchangers are commonly used with particle recycling systems to allow an increased superficial velocity and higher heat transfer rates. Here, experimental results are reported on a novel helical flow channel geometry for liquid/solid fluidized beds which allow higher heat transfer rates and reduced complexity by operating below the particle transport fluid velocity. This eliminates the complexity of particle recycle systems whilst still delivering a compact heat exchanger. The qualitative character of the fluidization was studied for a range of particle types and sizes under several inclinations of the helices and various hydraulic diameters. The best fluidization combinations were further studied to obtain heat transfer coefficients and pressure drops. Improvements over the heat exchange from a plain concentric tube in an annulus were obtained to the following degree: vertical fluidized bed, 27%; helical baffles, 34 to 54%; and fluidized bed with helical baffles, 69 to 89%.

Keywords: liquid/solid circulating fluidized bed; sphericity; non-spherical particle; porosity; surface cleaning; enhanced heat transfer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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