Measurement of char surface temperature in a fluidized bed combustor using pyrometry with digital camera

A method is presented to measure the char surface temperature during conversion in fluidized bed (FB) using a digital camera. The method applies one-color pyrometry (P1C) sequentially for the three wavelength bands (red, green, and blue) changing from one band to another automatically as a function...

Descripción completa

Detalles Bibliográficos
Autores: Salinero González, Jesús, Gómez Barea, Alberto, Tripiana, M., Leckner, Bo
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2016
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/181310
Acceso en línea:https://hdl.handle.net/11441/181310
https://doi.org/10.1016/j.cej.2015.11.098
Access Level:acceso abierto
Palabra clave:Pyrometry
Fluidized bed
Char temperature
Char size
id ES_eebf5cc61d8b55079ced445abff8d9e6
oai_identifier_str oai:idus.us.es:11441/181310
network_acronym_str ES
network_name_str España
repository_id_str
spelling Measurement of char surface temperature in a fluidized bed combustor using pyrometry with digital cameraSalinero González, JesúsGómez Barea, AlbertoTripiana, M.Leckner, BoPyrometryFluidized bedChar temperatureChar sizeA method is presented to measure the char surface temperature during conversion in fluidized bed (FB) using a digital camera. The method applies one-color pyrometry (P1C) sequentially for the three wavelength bands (red, green, and blue) changing from one band to another automatically as a function of radiation intensity received by the sensor of the video camera. Experiments were made in a two-dimensional FB combustor (0.18 × 0.50 × 0.018 m) equipped with a window for visual observation. It is shown that the new method improves the accuracy compared to two-color pyrometry (P2C), allowing the measurement of a wider range of temperature, including temperatures lower than the bed (background). The main limitation of P1C (compared to P2C) is that the char emissivity has to be known. However, a sensitivity analysis, assuming a char emissivity variation from 0.85 to 1, reveled that the relative error in temperature is lower than 1% when the surface temperature of the char is higher than that of the bed. Then an assumed value of emissivity within this range is sufficient. However, a more precise estimate of char emissivity is needed when measuring temperatures lower than the bed temperature. Furthermore, the method enables determination of details such as surface temperature gradients and size of the particle during combustion. Overall, the technique allows determination of precise data of the fuel conversion process in FB.ElsevierIngeniería Química y AmbientalMinisterio de Ciencia e Innovación (MICIN). España2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/181310https://doi.org/10.1016/j.cej.2015.11.098reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésChemical Engineering Journal, 288, 441-450.ENE2012-37999https://www.sciencedirect.com/science/article/pii/S1385894715016502info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1813102026-06-17T12:51:07Z
dc.title.none.fl_str_mv Measurement of char surface temperature in a fluidized bed combustor using pyrometry with digital camera
title Measurement of char surface temperature in a fluidized bed combustor using pyrometry with digital camera
spellingShingle Measurement of char surface temperature in a fluidized bed combustor using pyrometry with digital camera
Salinero González, Jesús
Pyrometry
Fluidized bed
Char temperature
Char size
title_short Measurement of char surface temperature in a fluidized bed combustor using pyrometry with digital camera
title_full Measurement of char surface temperature in a fluidized bed combustor using pyrometry with digital camera
title_fullStr Measurement of char surface temperature in a fluidized bed combustor using pyrometry with digital camera
title_full_unstemmed Measurement of char surface temperature in a fluidized bed combustor using pyrometry with digital camera
title_sort Measurement of char surface temperature in a fluidized bed combustor using pyrometry with digital camera
dc.creator.none.fl_str_mv Salinero González, Jesús
Gómez Barea, Alberto
Tripiana, M.
Leckner, Bo
author Salinero González, Jesús
author_facet Salinero González, Jesús
Gómez Barea, Alberto
Tripiana, M.
Leckner, Bo
author_role author
author2 Gómez Barea, Alberto
Tripiana, M.
Leckner, Bo
author2_role author
author
author
dc.contributor.none.fl_str_mv Ingeniería Química y Ambiental
Ministerio de Ciencia e Innovación (MICIN). España
dc.subject.none.fl_str_mv Pyrometry
Fluidized bed
Char temperature
Char size
topic Pyrometry
Fluidized bed
Char temperature
Char size
description A method is presented to measure the char surface temperature during conversion in fluidized bed (FB) using a digital camera. The method applies one-color pyrometry (P1C) sequentially for the three wavelength bands (red, green, and blue) changing from one band to another automatically as a function of radiation intensity received by the sensor of the video camera. Experiments were made in a two-dimensional FB combustor (0.18 × 0.50 × 0.018 m) equipped with a window for visual observation. It is shown that the new method improves the accuracy compared to two-color pyrometry (P2C), allowing the measurement of a wider range of temperature, including temperatures lower than the bed (background). The main limitation of P1C (compared to P2C) is that the char emissivity has to be known. However, a sensitivity analysis, assuming a char emissivity variation from 0.85 to 1, reveled that the relative error in temperature is lower than 1% when the surface temperature of the char is higher than that of the bed. Then an assumed value of emissivity within this range is sufficient. However, a more precise estimate of char emissivity is needed when measuring temperatures lower than the bed temperature. Furthermore, the method enables determination of details such as surface temperature gradients and size of the particle during combustion. Overall, the technique allows determination of precise data of the fuel conversion process in FB.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/181310
https://doi.org/10.1016/j.cej.2015.11.098
url https://hdl.handle.net/11441/181310
https://doi.org/10.1016/j.cej.2015.11.098
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Chemical Engineering Journal, 288, 441-450.
ENE2012-37999
https://www.sciencedirect.com/science/article/pii/S1385894715016502
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869423774512709632
score 15,81155

Similares en LA Referencia