PHYSICAL AND THERMAL PROPERTIES OF EUCALYPTUS WOOD CHARCOAL.

ABSTRACT The knowledge of the physical and thermal properties of eucalyptus charcoal is of fundamental importance in the design of equipment and development of cooling technologies. However, literature about physical properties for eucalyptus wood charcoal is largely unavailable, especially the thermal and aerodynamic properties, for the same material. The aim of this study was to evaluate the physical properties of eucalyptus charcoal: apparent and bulk density, pressure drop, porosity, thermal conductivity and specific heat to support the design of production and cooling systems using heat exchangers. It was found that the pressure drop could be expressed according Forchheimer’s law and logarithmical empirical models, resulting in R2 above 0.95. The apparent and bulk densities were measured as 344.6 ± 17.6 and 155.3 ± 4.1 kg.m-3, respectively, and the charcoal porosity was 54.8 ± 2%. In the investigation of flow in porous charcoal media, the pressure gradient is proportional to the increase of the superficial airflow velocity and is dependent on the charcoal bed height for low airflows and lower bed heights. However, the gradient was independent of bed height on all tests with columns larger or equal to 0.80 m. The thermal conductivity and specific heat were 0.030 ± 0.0027 W m-1.K-1 and 1017 ± 74 J.kg-1.K-1, respectively.

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Main Authors: Santos,Ivanildo da Silva dos, Martins,Marcio Arêdes, Pereira,Emanuele Graciosa, Carneiro,Angélica de Cássia Oliveira
Format: Digital revista
Language:English
Published: UFLA - Universidade Federal de Lavras 2020
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-77602020000100109
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spelling oai:scielo:S0104-776020200001001092020-06-16PHYSICAL AND THERMAL PROPERTIES OF EUCALYPTUS WOOD CHARCOAL.Santos,Ivanildo da Silva dosMartins,Marcio ArêdesPereira,Emanuele GraciosaCarneiro,Angélica de Cássia Oliveira Kiln Porosity Pressure drop Specific heat Thermal conductivity ABSTRACT The knowledge of the physical and thermal properties of eucalyptus charcoal is of fundamental importance in the design of equipment and development of cooling technologies. However, literature about physical properties for eucalyptus wood charcoal is largely unavailable, especially the thermal and aerodynamic properties, for the same material. The aim of this study was to evaluate the physical properties of eucalyptus charcoal: apparent and bulk density, pressure drop, porosity, thermal conductivity and specific heat to support the design of production and cooling systems using heat exchangers. It was found that the pressure drop could be expressed according Forchheimer’s law and logarithmical empirical models, resulting in R2 above 0.95. The apparent and bulk densities were measured as 344.6 ± 17.6 and 155.3 ± 4.1 kg.m-3, respectively, and the charcoal porosity was 54.8 ± 2%. In the investigation of flow in porous charcoal media, the pressure gradient is proportional to the increase of the superficial airflow velocity and is dependent on the charcoal bed height for low airflows and lower bed heights. However, the gradient was independent of bed height on all tests with columns larger or equal to 0.80 m. The thermal conductivity and specific heat were 0.030 ± 0.0027 W m-1.K-1 and 1017 ± 74 J.kg-1.K-1, respectively.info:eu-repo/semantics/openAccessUFLA - Universidade Federal de LavrasCERNE v.26 n.1 20202020-03-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-77602020000100109en10.1590/01047760202026012699
institution SCIELO
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country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Santos,Ivanildo da Silva dos
Martins,Marcio Arêdes
Pereira,Emanuele Graciosa
Carneiro,Angélica de Cássia Oliveira
spellingShingle Santos,Ivanildo da Silva dos
Martins,Marcio Arêdes
Pereira,Emanuele Graciosa
Carneiro,Angélica de Cássia Oliveira
PHYSICAL AND THERMAL PROPERTIES OF EUCALYPTUS WOOD CHARCOAL.
author_facet Santos,Ivanildo da Silva dos
Martins,Marcio Arêdes
Pereira,Emanuele Graciosa
Carneiro,Angélica de Cássia Oliveira
author_sort Santos,Ivanildo da Silva dos
title PHYSICAL AND THERMAL PROPERTIES OF EUCALYPTUS WOOD CHARCOAL.
title_short PHYSICAL AND THERMAL PROPERTIES OF EUCALYPTUS WOOD CHARCOAL.
title_full PHYSICAL AND THERMAL PROPERTIES OF EUCALYPTUS WOOD CHARCOAL.
title_fullStr PHYSICAL AND THERMAL PROPERTIES OF EUCALYPTUS WOOD CHARCOAL.
title_full_unstemmed PHYSICAL AND THERMAL PROPERTIES OF EUCALYPTUS WOOD CHARCOAL.
title_sort physical and thermal properties of eucalyptus wood charcoal.
description ABSTRACT The knowledge of the physical and thermal properties of eucalyptus charcoal is of fundamental importance in the design of equipment and development of cooling technologies. However, literature about physical properties for eucalyptus wood charcoal is largely unavailable, especially the thermal and aerodynamic properties, for the same material. The aim of this study was to evaluate the physical properties of eucalyptus charcoal: apparent and bulk density, pressure drop, porosity, thermal conductivity and specific heat to support the design of production and cooling systems using heat exchangers. It was found that the pressure drop could be expressed according Forchheimer’s law and logarithmical empirical models, resulting in R2 above 0.95. The apparent and bulk densities were measured as 344.6 ± 17.6 and 155.3 ± 4.1 kg.m-3, respectively, and the charcoal porosity was 54.8 ± 2%. In the investigation of flow in porous charcoal media, the pressure gradient is proportional to the increase of the superficial airflow velocity and is dependent on the charcoal bed height for low airflows and lower bed heights. However, the gradient was independent of bed height on all tests with columns larger or equal to 0.80 m. The thermal conductivity and specific heat were 0.030 ± 0.0027 W m-1.K-1 and 1017 ± 74 J.kg-1.K-1, respectively.
publisher UFLA - Universidade Federal de Lavras
publishDate 2020
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-77602020000100109
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