Heat Transfer in a Fixed Bed of Straw Char

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A model for the thermal conductivity of a straw char bed has been developed. The model extends the work of Yagi and Kunii to describe heat transfer in a bed of cylinders, using a relationship between the interparticle distance and the external porosity. To verify the model, thermal conductivity experiments were performed on shredded and un-shredded straw char samples, varying particle size, bed packing (loose or dense), and temperature. Predictions with the model, using the measured external porosity and particle diameter as input parameters, are in agreement with measurements within the experimental uncertainty over the range of conditions investigated. The heat transfer model was used in a parametric study to evaluate the effect of gas flow rate, particle diameter, porosity, and temperature on the thermal conductivity in a straw char bed.
Original languageEnglish
JournalEnergy & Fuels
Volume17
Issue number5
Pages (from-to)1251-1258
ISSN0887-0624
DOIs
Publication statusPublished - 2003

Cite this

@article{9dcc98c249df42018a8756c079d9b9cb,
title = "Heat Transfer in a Fixed Bed of Straw Char",
abstract = "A model for the thermal conductivity of a straw char bed has been developed. The model extends the work of Yagi and Kunii to describe heat transfer in a bed of cylinders, using a relationship between the interparticle distance and the external porosity. To verify the model, thermal conductivity experiments were performed on shredded and un-shredded straw char samples, varying particle size, bed packing (loose or dense), and temperature. Predictions with the model, using the measured external porosity and particle diameter as input parameters, are in agreement with measurements within the experimental uncertainty over the range of conditions investigated. The heat transfer model was used in a parametric study to evaluate the effect of gas flow rate, particle diameter, porosity, and temperature on the thermal conductivity in a straw char bed.",
author = "Fjellerup, {Jan S{\o}ren} and Henriksen, {Ulrik Birk} and Anker Jensen and Jensen, {Peter Arendt} and Peter Glarborg",
year = "2003",
doi = "10.1021/ef030036n",
language = "English",
volume = "17",
pages = "1251--1258",
journal = "Energy & Fuels",
issn = "0887-0624",
publisher = "American Chemical Society",
number = "5",

}

Heat Transfer in a Fixed Bed of Straw Char. / Fjellerup, Jan Søren; Henriksen, Ulrik Birk; Jensen, Anker; Jensen, Peter Arendt; Glarborg, Peter.

In: Energy & Fuels, Vol. 17, No. 5, 2003, p. 1251-1258.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Heat Transfer in a Fixed Bed of Straw Char

AU - Fjellerup, Jan Søren

AU - Henriksen, Ulrik Birk

AU - Jensen, Anker

AU - Jensen, Peter Arendt

AU - Glarborg, Peter

PY - 2003

Y1 - 2003

N2 - A model for the thermal conductivity of a straw char bed has been developed. The model extends the work of Yagi and Kunii to describe heat transfer in a bed of cylinders, using a relationship between the interparticle distance and the external porosity. To verify the model, thermal conductivity experiments were performed on shredded and un-shredded straw char samples, varying particle size, bed packing (loose or dense), and temperature. Predictions with the model, using the measured external porosity and particle diameter as input parameters, are in agreement with measurements within the experimental uncertainty over the range of conditions investigated. The heat transfer model was used in a parametric study to evaluate the effect of gas flow rate, particle diameter, porosity, and temperature on the thermal conductivity in a straw char bed.

AB - A model for the thermal conductivity of a straw char bed has been developed. The model extends the work of Yagi and Kunii to describe heat transfer in a bed of cylinders, using a relationship between the interparticle distance and the external porosity. To verify the model, thermal conductivity experiments were performed on shredded and un-shredded straw char samples, varying particle size, bed packing (loose or dense), and temperature. Predictions with the model, using the measured external porosity and particle diameter as input parameters, are in agreement with measurements within the experimental uncertainty over the range of conditions investigated. The heat transfer model was used in a parametric study to evaluate the effect of gas flow rate, particle diameter, porosity, and temperature on the thermal conductivity in a straw char bed.

U2 - 10.1021/ef030036n

DO - 10.1021/ef030036n

M3 - Journal article

VL - 17

SP - 1251

EP - 1258

JO - Energy & Fuels

JF - Energy & Fuels

SN - 0887-0624

IS - 5

ER -