An experimental investigation of wall-bed heat transfer and flow characteristics in a swirling fluidized bed reactor

Tawfik, Mohamed Hamam M.; Diab, Mohamed Refaat; Abdelmotalib, Hamada

doi:10.1016/j.applthermaleng.2019.04.022

Cited by 14 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The uidized bed is a highly efficient chemical reactor whose main advantages are its high specic surface area and good mixing properties. 20,21 The high specic surface area and homogenous mixing of the particles can signicantly improve the heat exchange between the particles and gases, reducing the temperature variation along the axial direction. The small temperature variation of the particles and gases would then enhance the axial heat transfer of the tube, thus decreasing the axial temperature gradient of the tubes.…”

Section: Introductionmentioning

confidence: 99%

Temperature gradient reduction in a tubular direct ammonia solid oxide fuel cell by fluidizing the cathode particles

Qiu,

Yang,

et al. 2024

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Temperature gradient reduction in a tubular direct ammonia solid oxide fuel cell by fluidizing the cathode particles

Qiu,

Yang,

et al. 2024

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

“…Moreover, it has the capacity to fluidize Geldart Type-D particles, which are often large and difficult to fluidize [4]. As a result of these advantages, SFB has become the most effective technology for several applications, including as heat transfer and bed dynamics, drying process, new modern application and many other [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Twist Blade Distributor in Fluidization Systems: Part 1 – The Computational Procedure

Alias

Nawi

Sarip

et al. 2023

ARASET

View full text Add to dashboard Cite

Flowing gas in fluidized bed through selected inlet distributor may imparts a drag effect on the particles, would cause an increase in gas flow, that maybe sufficient to rearrange the particles movement. Thus, study on the airflow in a fluidization system through numerical analysis has been conducted to investigate the airflow distribution affected by new model distributor of twist blade distributor configuration. The present study would emphasis on computational procedure and parametric study via ANSYS Fluent before a detailed study on selected twist blade distributor are conducted. The selected parametric study on the twist blade distributor configuration whereby the twist blade angle (100°), horizontal inclination angle (15°), radial inclination angle (10°) and number of blades (60) was carried out. Therefore, the results of the studies that have been carried out meet the expected standards based on previous studies.

show abstract

“…The focus of the current work is to design and develop an efficient, integral, and controllable nozzle installed with a swirling flow generator to enhance and optimize the gas–solid flow process in the spouted bed. In order to utilize cylindrical spouted beds more effectively in industrial application, such as drying of granular material , and heat transfer of fluidized bed, a swirling flow generator installed on the nozzle is adopted to improve the radial contact between gas and solid phases in the spout and annulus of the spouted bed. In the work reported herein, three-dimensional hydrodynamic behaviors of a spouted bed under the action of swirling flow were numerically studied, the Gidaspow drag model is selected to describe the momentum exchange of the interface, and the two-fluid model is used.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Gas–Solid Flow in a Spouted Bed Installed with a Controllable Nozzle and a Swirling Flow Generator

Che

Huang

et al. 2020

ACS Omega

View full text Add to dashboard Cite

The swirling flow technology is adopted on a nozzle of the spouted bed in order to enhance the radial movement of the particles. The hydrodynamic characteristics in a spouted bed with a swirling flow generator installed on the nozzle are numerically investigated based on the two-fluid model (TFM). The traditional spouted bed and spouted bed with an integral swirling blade nozzle (ISBN) are simulated and analyzed. Numerical results show that the dead zone at the cone region of the annulus can be effectively eliminated by using the ISBN. The maximum decrease in particle concentration near the cone region is 72%, and the ISBN structure can significantly improve the comprehensive fluidization degree of the spouted bed when γ equals 86°. The turbulent kinetic energy of gas can be significantly increased by the swirling flow along the radial direction in the spouted bed, especially in the spout region. Also, the swirling flow can promote the radial velocity and granular temperature of the particles in the spouted bed, which is helpful to the radial mixing of particles and gas phase between the central spout and the annulus in the spouted bed. There exists a value of ξ (equals 0.526), which brings the greatest elimination effect of the flow dead zone in the annulus of the limited spouted bed space, and the overall fluidization of the spouted bed has the best performance when ξ = 0.316.

show abstract

An experimental investigation of wall-bed heat transfer and flow characteristics in a swirling fluidized bed reactor

Cited by 14 publications

References 15 publications

Temperature gradient reduction in a tubular direct ammonia solid oxide fuel cell by fluidizing the cathode particles

Temperature gradient reduction in a tubular direct ammonia solid oxide fuel cell by fluidizing the cathode particles

Twist Blade Distributor in Fluidization Systems: Part 1 – The Computational Procedure

Numerical Study on the Gas–Solid Flow in a Spouted Bed Installed with a Controllable Nozzle and a Swirling Flow Generator

Contact Info

Product

Resources

About