Mathematical Modeling of Rotary Drying of Woody Biomass

Xu, Qixiang; Pang, Shusheng

doi:10.1080/07373930802331050

Cited by 57 publications

(23 citation statements)

References 4 publications

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“…For example, the pyrolysis needs very dry biomass (less than 2% MC), gasification and pelletization needs the biomass at a moisture content of about 10%, and the direct combustion can handle wetter biomass (up to 20% MC). In addition, it was found that uniformity of drying also significantly affects the energy efficiency in heat plants (Xu and Pang 2008). Lee (2006) performed tests on drying sawdust with direct contact thermal screw dryer.…”

Section: Introductionmentioning

confidence: 99%

Study on the Estimation of Drying Time of Biomass : 1. Larch Wood Chip

Lee¹

2015

Journal of the Korean Wood Science and Technology

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This study aims at modeling the rotary drying of wood chips in co-current mode and estimating the drying time of larch (Larix kaemferi) wood chip. Drying data were obtained in a lab. scale fixed bed dryer operating with an air velocity of 1 m/sec. and at hot air inlet temperatures of 100℃, 200℃, and 300℃. The lab. scale fixed-bed drying rates for small, medium and large size larch wood chips that had been dried from 40% wet-based moisture content (MC) to 10% MC at 200℃ drying temperature were 17.3 %/min., 10.2 %/min. and 5.5 %/min., respectively. It was predicted that larch large size wood chips could be dried from 40% MC to 10% MC in about 23.0, 34.6, and 44.7 minutes at 300℃, 200℃ and 150℃, respectively. Expected drying times for medium size chips were about 8.6, 11.2 and 13.2 minutes and those for small size chips were 4.3, 5.5 and 6.4 minutes, respectively.

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Section: Introductionmentioning

confidence: 99%

Study on the Estimation of Drying Time of Biomass : 1. Larch Wood Chip

Lee¹

2015

Journal of the Korean Wood Science and Technology

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“…The literature presents some drying models for conventional rotary dryers based on the application of mass and energy balance equations for both solid and fluid phases (Kemp and Oakley, 1997;Cao and Langrish, 2000;Zabaniotou, 2000;Iguaz et al, 2003;Xu and Pang, 2008;Arruda et al, 2009b). This approach requires constitutive equations for the heat transfer coefficients, drying kinetics, equilibrium moisture content and fluid dynamic characteristics.…”

Section: Introductionmentioning

confidence: 99%

Modelling of fertilizer drying in a rotary dryer: parametric sensitivity analysis

Silva

Lira

Arruda

et al. 2012

Braz. J. Chem. Eng.

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-This study analyzed the influence of the following parameters: overall volumetric heat transfer coefficient, coefficient of heat loss, drying rate, specific heat of the solid and specific heat of dry air on the prediction of a model for the fertilizer drying in rotary dryers. The method of parametric sensitivity using an experimental design was employed in this study. All parameters studied significantly affected the responses of the drying model. In general, the model showed greater sensitivity to the parameters drying rate and overall volumetric heat transfer coefficient.

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“…The target moisture content after drying varies from 2 to 20%, depending on the conversion technologies used [6].…”

Section: Introductionmentioning

confidence: 99%

Drying Mechanism of Unutilized Cedar Logs as a Source of Heating Fuel

Hoang¹,

Nagasaki²,

Kawabata³

et al. 2015

IJCEA

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-In Japan, small, forested areas are often destroyed because neglect due to a slump in wood prices and a shortage of labor. Promotion of forest maintenance along with the use of unused woody biomass is desired. In this study, the drying mechanism of Cedar (Cryptomeria japonica) logs destined to be used as heating was examined. The experimental results show that cedar samples reached the fiber saturation point after 4-5 months of drying on site. The water in the wood moved to the cut ends and evaporated because of the high pressure differences on the surfaces of the cut ends. The water content in the center of the logs was higher than that at the cut ends because closed pits in the vessel structures prevented the passage of water.

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Mathematical Modeling of Rotary Drying of Woody Biomass

Cited by 57 publications

References 4 publications

Study on the Estimation of Drying Time of Biomass : 1. Larch Wood Chip

Study on the Estimation of Drying Time of Biomass : 1. Larch Wood Chip

Modelling of fertilizer drying in a rotary dryer: parametric sensitivity analysis

Drying Mechanism of Unutilized Cedar Logs as a Source of Heating Fuel

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