### Abstract

The model is based on the solution of the conservation equations for mass and energy. The drying is considered to consist of three successive periods: a short initial heating period, period of constant rate of drying and period of falling rate of drying. It is assumed that the particle moisture distribution is uniform during the constant rate of drying. Shrinking core model is assumed for the falling rate period. esides fuel particles, the model is applicable also for other solid particle drying processes.

Model calculations are compared to measurements for wood chips. The model can predict the efFect of the main parameters reasonably well. These main parameters affecting the drying rate are: particle size, particle shape, initial particle moisture content, gas temperature and gas moisture content, emperature of the reactor walls and slip velocity. The irregular shape of practical fuel particles can approximately be simulated as one-dimensional case ( plate, cylinder, sphere) by using an equivalent volumc to surface area ratio.

Original language | English |
---|---|

Pages (from-to) | 1305-1315 |

Journal | Drying Technology |

Volume | 13 |

Issue number | 5 - 7 |

DOIs | |

Publication status | Published - 1995 |

MoE publication type | A1 Journal article-refereed |

Event | 9th Internatonal Drying Symposium, IDS'94 - Gold Coast, Australia Duration: 1 Aug 1994 → 4 Aug 1994 |

### Fingerprint

### Keywords

- solid fuels
- fuels
- drying
- particles
- models
- wood

### Cite this

*Drying Technology*,

*13*(5 - 7), 1305-1315. https://doi.org/10.1080/07373939508917023

}

*Drying Technology*, vol. 13, no. 5 - 7, pp. 1305-1315. https://doi.org/10.1080/07373939508917023

**Drying of solid fuel particles in hot gases.** / Saastamoinen, Jaakko; Impola, Risto.

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

TY - JOUR

T1 - Drying of solid fuel particles in hot gases

AU - Saastamoinen, Jaakko

AU - Impola, Risto

PY - 1995

Y1 - 1995

N2 - Drying of solid fuel particles in hot gases ( 50–200c) is studied both theoretically and experimentally. The measurements are carried out by using a thermobalance reactor constructed for drying and pyrolysis studies of particles up to 30 mm by diameter. The model is based on the solution of the conservation equations for mass and energy. The drying is considered to consist of three successive periods: a short initial heating period, period of constant rate of drying and period of falling rate of drying. It is assumed that the particle moisture distribution is uniform during the constant rate of drying. Shrinking core model is assumed for the falling rate period. esides fuel particles, the model is applicable also for other solid particle drying processes. Model calculations are compared to measurements for wood chips. The model can predict the efFect of the main parameters reasonably well. These main parameters affecting the drying rate are: particle size, particle shape, initial particle moisture content, gas temperature and gas moisture content, emperature of the reactor walls and slip velocity. The irregular shape of practical fuel particles can approximately be simulated as one-dimensional case ( plate, cylinder, sphere) by using an equivalent volumc to surface area ratio.

AB - Drying of solid fuel particles in hot gases ( 50–200c) is studied both theoretically and experimentally. The measurements are carried out by using a thermobalance reactor constructed for drying and pyrolysis studies of particles up to 30 mm by diameter. The model is based on the solution of the conservation equations for mass and energy. The drying is considered to consist of three successive periods: a short initial heating period, period of constant rate of drying and period of falling rate of drying. It is assumed that the particle moisture distribution is uniform during the constant rate of drying. Shrinking core model is assumed for the falling rate period. esides fuel particles, the model is applicable also for other solid particle drying processes. Model calculations are compared to measurements for wood chips. The model can predict the efFect of the main parameters reasonably well. These main parameters affecting the drying rate are: particle size, particle shape, initial particle moisture content, gas temperature and gas moisture content, emperature of the reactor walls and slip velocity. The irregular shape of practical fuel particles can approximately be simulated as one-dimensional case ( plate, cylinder, sphere) by using an equivalent volumc to surface area ratio.

KW - solid fuels

KW - fuels

KW - drying

KW - particles

KW - models

KW - wood

U2 - 10.1080/07373939508917023

DO - 10.1080/07373939508917023

M3 - Article

VL - 13

SP - 1305

EP - 1315

JO - Drying Technology

JF - Drying Technology

SN - 0737-3937

IS - 5 - 7

ER -