Influence of aeration on the hydrodynamic behavior of a pressurized circulating fluidized bed

Azd Zayoud; Yerbol Sarbassov; P. Mahanta; U. K. Saha; Sai Gu

doi:10.1007/978-81-322-2743-4_11

Influence of aeration on the hydrodynamic behavior of a pressurized circulating fluidized bed

Azd Zayoud
, Yerbol Sarbassov
, P. Mahanta
, U. K. Saha
, Sai Gu

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

In the present investigation, the effect of aeration rate on bed hydrodynamics in the riser of a pressurized circulating fluidized bed (PCFB) has been studied. Experiments are conducted with two different bed inventories, viz. 500 and 750 g. Aeration superficial velocities, U_sup = 0.65, 1.94, and 3.23 m/s respectively are used to observe the change of bed hydrodynamics of the PCFB. Operating velocities of 2.72, 3.4 and 4.08 m/s and pressures of 100, 200, and 250 kPa are maintained for each inventory and aeration rate. It has been observed that the suspension density increases along the riser height with the decrease in aeration rate. The solid circulation rate increases with the increase in aeration rate as well as primary air flow rate. The present study will help in optimizing the aeration rate for smooth operation of the non-mechanical valve or the stand pipe without obstruction of inventory material.

Original language	English
Pages (from-to)	105-114
Number of pages	10
Journal	Lecture Notes in Mechanical Engineering
DOIs	https://doi.org/10.1007/978-81-322-2743-4_11
Publication status	Published - 2017
Externally published	Yes

Funding

The authors would like to thank Marie Curie Actions—International Research Staff Exchange Scheme (IRSES) (iComFluid—International Collaboration on Computational Modelling of Fluidised Bed Systems for Clean Energy Technologies), for funding the research. We also thank Dr. Haitham Issa at Tishreen University for offering us TARQUIME software.

Keywords

Aeration air
Axial voidage
Hydrodynamic behaviour
Pressurized circulating fluidized beds (PCFB)
Solid circulation rate
Suspension density

ASJC Scopus subject areas

Automotive Engineering
Aerospace Engineering
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1007/978-81-322-2743-4_11

Cite this

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title = "Influence of aeration on the hydrodynamic behavior of a pressurized circulating fluidized bed",

abstract = "In the present investigation, the effect of aeration rate on bed hydrodynamics in the riser of a pressurized circulating fluidized bed (PCFB) has been studied. Experiments are conducted with two different bed inventories, viz. 500 and 750 g. Aeration superficial velocities, Usup = 0.65, 1.94, and 3.23 m/s respectively are used to observe the change of bed hydrodynamics of the PCFB. Operating velocities of 2.72, 3.4 and 4.08 m/s and pressures of 100, 200, and 250 kPa are maintained for each inventory and aeration rate. It has been observed that the suspension density increases along the riser height with the decrease in aeration rate. The solid circulation rate increases with the increase in aeration rate as well as primary air flow rate. The present study will help in optimizing the aeration rate for smooth operation of the non-mechanical valve or the stand pipe without obstruction of inventory material.",

keywords = "Aeration air, Axial voidage, Hydrodynamic behaviour, Pressurized circulating fluidized beds (PCFB), Solid circulation rate, Suspension density",

author = "Azd Zayoud and Yerbol Sarbassov and P. Mahanta and Saha, \{U. K.\} and Sai Gu",

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AU - Zayoud, Azd

AU - Sarbassov, Yerbol

AU - Mahanta, P.

AU - Saha, U. K.

AU - Gu, Sai

N1 - Publisher Copyright: © Springer India 2017.

PY - 2017

Y1 - 2017

N2 - In the present investigation, the effect of aeration rate on bed hydrodynamics in the riser of a pressurized circulating fluidized bed (PCFB) has been studied. Experiments are conducted with two different bed inventories, viz. 500 and 750 g. Aeration superficial velocities, Usup = 0.65, 1.94, and 3.23 m/s respectively are used to observe the change of bed hydrodynamics of the PCFB. Operating velocities of 2.72, 3.4 and 4.08 m/s and pressures of 100, 200, and 250 kPa are maintained for each inventory and aeration rate. It has been observed that the suspension density increases along the riser height with the decrease in aeration rate. The solid circulation rate increases with the increase in aeration rate as well as primary air flow rate. The present study will help in optimizing the aeration rate for smooth operation of the non-mechanical valve or the stand pipe without obstruction of inventory material.

AB - In the present investigation, the effect of aeration rate on bed hydrodynamics in the riser of a pressurized circulating fluidized bed (PCFB) has been studied. Experiments are conducted with two different bed inventories, viz. 500 and 750 g. Aeration superficial velocities, Usup = 0.65, 1.94, and 3.23 m/s respectively are used to observe the change of bed hydrodynamics of the PCFB. Operating velocities of 2.72, 3.4 and 4.08 m/s and pressures of 100, 200, and 250 kPa are maintained for each inventory and aeration rate. It has been observed that the suspension density increases along the riser height with the decrease in aeration rate. The solid circulation rate increases with the increase in aeration rate as well as primary air flow rate. The present study will help in optimizing the aeration rate for smooth operation of the non-mechanical valve or the stand pipe without obstruction of inventory material.

KW - Aeration air

KW - Axial voidage

KW - Hydrodynamic behaviour

KW - Pressurized circulating fluidized beds (PCFB)

KW - Solid circulation rate

KW - Suspension density

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SP - 105

EP - 114

JO - Lecture Notes in Mechanical Engineering

JF - Lecture Notes in Mechanical Engineering

ER -

Influence of aeration on the hydrodynamic behavior of a pressurized circulating fluidized bed

Abstract

Funding

Keywords

ASJC Scopus subject areas

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