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Thursday, October 22, 2020 | History

2 edition of Fluid dynamics of a fluidized bed packed with heat exchangers. found in the catalog.

Fluid dynamics of a fluidized bed packed with heat exchangers.

New York University. Aerospace and Energetics Laboratory.

Fluid dynamics of a fluidized bed packed with heat exchangers.

by New York University. Aerospace and Energetics Laboratory.

  • 302 Want to read
  • 17 Currently reading

Published by Dept. of Energy, for sale by the National Technical Information Service in [Washington], Springfield, Va .
Written in English

    Subjects:
  • Fluidized-bed furnaces.,
  • Heat exchangers.,
  • Heat -- Transmission.

  • Edition Notes

    ContributionsZakkay, V., United States. Dept. of Energy.
    The Physical Object
    Paginationv. :
    ID Numbers
    Open LibraryOL17647979M

    Industrial Heat Exchangers Fluid Dynamics has a full range of Heat Exchangers available with an unrivalled ability to design and manufacture just about any heat exchanger commonly used in industrial applications. You can rely on Fluid Dynamics to provide the best solution. We understand the need for all industrial machinery to work efficiently and dentalimplantsverobeach.com more. With Fluid Dynamics, and its carefully selected Australian and international partners, there is almost no limit to the solutions we can offer in the design, manufacture, repair, refurbishment, testing and service of heat exchangers. If you need a Heat Exchange solution you need Fluid Dynamics, a one stop shop for almost all heat exchanger.

    The fluid mechanical behaviour of different types of circulating fluidized beds can be explained with the aid of the state and pressure drop diagram for segregated vertical gas‐solids flow. As an example, the operating behaviour of circulating fluidized bed with a syphon in the solids downcomer is discussed. Nov 22,  · Application of Computational Fluid Dynamics to Multiphase Flow in Bubble Columns; Reaction-Transport Model for Randomly Packed-Bed Scrubbers for Pulp and Paper Effluents; liquid-fluidized bed heat exchangers and thermal energy storage; and bioreactors. Fluidized-bed bioreactors, which have received much attention during the past thirty Cited by:

    ABOUT Thermopedia Get Permissions Related Conferences 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics July 17 – 19, , Portorž, Slovenia The 12th International Symposium on Numerical Analysis of Fluid Flows, Heat and Mass Transfer - Numerical Fluids September 25 – 30, , The MET Hotel, Thessaloniki, Greece 24th National and 2nd . Design of industrial scale packed bed reactors can be aided by using computational fluid dynamics (CFD)-discrete element method (DEM) simulation for understanding the transport phenomena. However, conducting CFD-DEM simulation for the whole large-scale packed bed reactor is computationally prohibitive, which limits the usage of this tool. Hence, a methodology has been developed to identify Cited by:


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Fluid dynamics of a fluidized bed packed with heat exchangers by New York University. Aerospace and Energetics Laboratory. Download PDF EPUB FB2

Note: Citations are based on reference standards. However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied.

@article{osti_, title = {Heat transfer characteristics in a fluidized bed packed with heat exchangers}, author = {Zakkay, V. and Miller, G. and Brentan, A.}, abstractNote = {Under a contract to investigate the interrelationships between temperature distribution, fluid flow, boiler size and heat exchanger design in a fossil-fuel fired fluidized bed combustor a 1-ft and a 3-ft dia bed.

A circulating fluidized bed (CFB) is a special case of vertical gas/solid flows. we begin with a detailed description of the fluid dynamics of CFBs. Molerus O., Wirth KE. () Fluid dynamics of circulating fluidized beds. In: Heat Transfer in Fluidized Beds.

Powder Technology Series, vol Author: O. Molerus, K.-E. Wirth. In book: Theory and Calculation of Heat Transfer in Furnaces, pp the method for calculating heat transfer in a fluidized bed is introduced.

Both the influence of heating surface. High Performance Computational Fluid- Thermal Sciences & Engineering Lab Multi-phase heat transfer with fluidized bed • Temperature control, heat addition, extraction in fluidized beds • Example – CO 2 capture and regeneration (post combustion) • Temperature control is essential for optimal operation • Capture is exothermic • Regeneration is endothermic.

This book presents the papers given at a conference on fluidized beds. Topics considered at the conference included catalytic cracking, pneumatic transport, hydrodynamics, fast fluidization, fluidized-bed combustion, commercialization, fluidized bed boilers, fluidized bed rectors, fluid dynamics, pressure fluctuations, two-phase flow, flow models, dilute phase transport, heat transfer, coal.

Oct 26,  · Recent work has identified moving packed-bed heat exchangers as low-cost alternatives to fluidized-bed heat exchangers, which require additional pumps to fluidize the particles and recuperators to capture the lost heat.

Computational Fluid Dynamics and Heat Transfer Analysis for a Novel Heat Exchanger. Heat Transfer (May, Cited by: 4. These Fluidized bed tunnels are typically used on small food products like peas, shrimp or sliced vegetables, and may use cryogenic or vapor-compression refrigeration.

The fluid used in Fluidized beds may also contain a fluid of catalytic type; that's why it is also used to catalyse the chemical reaction and also to improve the rate of reaction. HEAT TRANSFER IN A FLUIDIZED BED TUBULAR HEAT EXCHANGER INTRODUCTION Industrial process heat transfer usually involves transferring energy from a hot flowing fluid to a cold flowing fluid, or as is the case in nuclear reactors, transferring energy from an energy gen- erating source to a flowing fluid.

To solve this problem engineers. Fluidized Beds A fluidized bed is a packed bed through which fluid flows at such a high velocity that the bed is loosened and the particle-fluid mixture behaves as though it is a fluid.

Thus, when a bed of particles is fluidized, the entire bed can be transported like a fluid, if desired. Both gas and liquid.

Fixed Bed. At high enough velocities fluid drag plus buoyancy overcomes the gravity force and the bed expands. Fluidized Bed. Low Velocity High Velocity Ap for Increasing u 0 Until onset of fluidization Ap increases, then becomes constant.

Bed Length for Increasing u 0 L is constant until onset of fluidization and then begins to increase. Aug 25,  · The heat-transfer process was modeled based on a particle/s-CO 2 counterflow configuration. Empirical heat-transfer correlations for the fluidized bed and s-CO 2 were used in calculating the heat-transfer area and optimizing the tube layout.

A 2-D computational fluid-dynamics simulation was applied for particle distribution and fluidization Cited by: 1. A rotating fluidized bed heat exchanger particularly adaptable as a heat exchange unit in the recuperator section of conventional gas turbine engines comprising an annular fluidized bed, defined by inner and outer spaced apart coaxial cylindrical, perforated walls, which rotates about the longitudinal axis of the cylinders.

The bed is comprised of pulverulent inert particulate material and Cited by: 6. Abstract. When a bed of solid particles is subjected to an upward fluid flow above a critical velocity called the minimum fluidization velocity, the bed becomes fluid-like in Author: Michael M.

Chen. The curvilinear version will eventually allow simulation of the fluid dynamics, heat transfer and erosion in more complex in-bed geometries. The overall goals are to improve the understanding of these processes in both pressurized and atmospheric fluidized-bed combustors and to develop better design methods for industrial dentalimplantsverobeach.com by: hydrodynamicsof the three phase fluidized bed depends on inter alia gas velocity, superficial liquid velocity, fluidized bed column height and diameter, physical properties of gas liquid and solid.

There are various research work undertaken in the area of fluidization engineering and its applications () since last four dentalimplantsverobeach.com: S.N.

Saha, G.P. Dewangan, R. Gadhewal. Zhou et al. [23] developed a comprehensive CFD-DEM model to study particleparticle and particle-fluid heat transfer in packed and bubbling fluidized beds at a particle scale. Tsory et al. [ Oct 27,  · The fluidized bed test rig (cf. Fig. 1) consisted of three steel autoclaves with a maximum operating pressure of 35 MPa.A membrane compressor established a flow of up to 50 kg CO 2 /h at pressure levels from 7 to 35 MPa.

The largest autoclave with a volume of · 10 − 3 m 3 contained fluidized bed columns of either 39 or 21 mm inner diameter which were both equipped with porous Cited by: Computational fluid dynamics simulation of fluidized bed polymerization reactors by Rong Fan A dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Major: Chemical Engineering Program of Study Committee: Rodney O.

Fox, Major Professor David K. Hoffman James C. Hill. This reference details particle characterization, dynamics, manufacturing, handling, and processing for the employment of multiphase reactors, as well as procedures in reactor scale-up and design for applications in the chemical, mineral, petroleum, power, cement and pharmaceuticals industries.

The authors discuss flow through fixed beds, elutriation and entrainment, gas distributor and plenum Reviews: 1. Packed beds have many applications in the chemical processing industry. For example, packed beds are used in reactors, separators, dryers, filters, and heat exchangers. The heat transfer throughout a packed bed can have a significant effect on the performance of the equipment.3 Fluid Dynamics of Gas Solid Fluidized Beds Germán González Silva 1, Natalia Prieto Jiménez 1 and Oscar Fabio Salazar State University of Campinas Brazil 1.

Introduction Fluidization refers to the contact between a bed of solids and a flow of fluid.Fluid bed technology is used for cooling, heating and drying of bulk solids materials. Fluid bed heat exchange takes place by passing a gas (most commonly air) through a perforated distributor plate which then flows through a layer (bed) of solids.