Comparative study of two non-intrusive measurement methods for bubbling gas-solids fluidized beds: Electrical capacitance tomography and pressure fluctuations

X. Li, A.J. Jaworski, X. Mao

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Conventional measurement techniques used to investigate the internal fluid flow processes in gas-solids fluidized beds are known to introduce disturbances to the flow. Two non-intrusive methods: pressure fluctuation measurement and electrical capacitance tomography (ECT) techniques have been usually used separately to study the complex two phase flow phenomena in fluidized beds. However, no systematic study has been carried out to compare these two methods in terms of their capabilities to reveal the hydrodynamic characteristics of fluidized beds. This paper presents a comparative study between these two non-intrusive measurement techniques within a bench-scale fluidized bed. Experiments were carried out using two alternative test sections (one equipped with pressure transducers, one with ECT sensor) for the same operating conditions. The performance of these two methods was evaluated against some important hydrodynamic parameters within fluidized beds, such as the determination of the minimum fluidization velocity, the minimum slugging velocity, dominant frequency and bubble rise velocity. The results demonstrate that the two measurement techniques can both provide broadly consistent results, although ECT tends to be more reliable with respect to estimating bubble rise velocity.
LanguageEnglish
Pages255-268
Number of pages14
JournalFlow Measurement and Instrumentation
Volume62
Early online date10 Aug 2017
DOIs
Publication statusPublished - 1 Aug 2018
Externally publishedYes

Fingerprint

nonintrusive measurement
Electrical Capacitance Tomography
Fluidized Bed
Fluidized beds
Comparative Study
Tomography
beds
Capacitance
tomography
capacitance
Fluctuations
Measurement Techniques
Gases
gases
Bubble
Hydrodynamics
bubbles
hydrodynamics
Fluidization
Internal Flow

Cite this

@article{3ff84596c0b54c5d925aacaf6c18a99e,
title = "Comparative study of two non-intrusive measurement methods for bubbling gas-solids fluidized beds: Electrical capacitance tomography and pressure fluctuations",
abstract = "Conventional measurement techniques used to investigate the internal fluid flow processes in gas-solids fluidized beds are known to introduce disturbances to the flow. Two non-intrusive methods: pressure fluctuation measurement and electrical capacitance tomography (ECT) techniques have been usually used separately to study the complex two phase flow phenomena in fluidized beds. However, no systematic study has been carried out to compare these two methods in terms of their capabilities to reveal the hydrodynamic characteristics of fluidized beds. This paper presents a comparative study between these two non-intrusive measurement techniques within a bench-scale fluidized bed. Experiments were carried out using two alternative test sections (one equipped with pressure transducers, one with ECT sensor) for the same operating conditions. The performance of these two methods was evaluated against some important hydrodynamic parameters within fluidized beds, such as the determination of the minimum fluidization velocity, the minimum slugging velocity, dominant frequency and bubble rise velocity. The results demonstrate that the two measurement techniques can both provide broadly consistent results, although ECT tends to be more reliable with respect to estimating bubble rise velocity.",
keywords = "Fluidized beds, Hydrodynamics, Electrical capacitance tomography, Pressure fluctuations, Non-intrusive methods",
author = "X. Li and A.J. Jaworski and X. Mao",
year = "2018",
month = "8",
day = "1",
doi = "10.1016/j.flowmeasinst.2017.08.002",
language = "English",
volume = "62",
pages = "255--268",
journal = "Flow Measurement and Instrumentation",
issn = "0955-5986",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Comparative study of two non-intrusive measurement methods for bubbling gas-solids fluidized beds

T2 - Flow Measurement and Instrumentation

AU - Li, X.

AU - Jaworski, A.J.

AU - Mao, X.

PY - 2018/8/1

Y1 - 2018/8/1

N2 - Conventional measurement techniques used to investigate the internal fluid flow processes in gas-solids fluidized beds are known to introduce disturbances to the flow. Two non-intrusive methods: pressure fluctuation measurement and electrical capacitance tomography (ECT) techniques have been usually used separately to study the complex two phase flow phenomena in fluidized beds. However, no systematic study has been carried out to compare these two methods in terms of their capabilities to reveal the hydrodynamic characteristics of fluidized beds. This paper presents a comparative study between these two non-intrusive measurement techniques within a bench-scale fluidized bed. Experiments were carried out using two alternative test sections (one equipped with pressure transducers, one with ECT sensor) for the same operating conditions. The performance of these two methods was evaluated against some important hydrodynamic parameters within fluidized beds, such as the determination of the minimum fluidization velocity, the minimum slugging velocity, dominant frequency and bubble rise velocity. The results demonstrate that the two measurement techniques can both provide broadly consistent results, although ECT tends to be more reliable with respect to estimating bubble rise velocity.

AB - Conventional measurement techniques used to investigate the internal fluid flow processes in gas-solids fluidized beds are known to introduce disturbances to the flow. Two non-intrusive methods: pressure fluctuation measurement and electrical capacitance tomography (ECT) techniques have been usually used separately to study the complex two phase flow phenomena in fluidized beds. However, no systematic study has been carried out to compare these two methods in terms of their capabilities to reveal the hydrodynamic characteristics of fluidized beds. This paper presents a comparative study between these two non-intrusive measurement techniques within a bench-scale fluidized bed. Experiments were carried out using two alternative test sections (one equipped with pressure transducers, one with ECT sensor) for the same operating conditions. The performance of these two methods was evaluated against some important hydrodynamic parameters within fluidized beds, such as the determination of the minimum fluidization velocity, the minimum slugging velocity, dominant frequency and bubble rise velocity. The results demonstrate that the two measurement techniques can both provide broadly consistent results, although ECT tends to be more reliable with respect to estimating bubble rise velocity.

KW - Fluidized beds

KW - Hydrodynamics

KW - Electrical capacitance tomography

KW - Pressure fluctuations

KW - Non-intrusive methods

UR - http://www.scopus.com/inward/record.url?scp=85027972681&partnerID=8YFLogxK

U2 - 10.1016/j.flowmeasinst.2017.08.002

DO - 10.1016/j.flowmeasinst.2017.08.002

M3 - Article

VL - 62

SP - 255

EP - 268

JO - Flow Measurement and Instrumentation

JF - Flow Measurement and Instrumentation

SN - 0955-5986

ER -