Energy Issues of Drying and Heat Treatment for Solid Wood and Other Biomass Sources

Perré, Patrick; Almeida, Giana; Colin, Julien

doi:10.1002/9783527631681.ch7

Cited by 6 publications

(6 citation statements)

References 63 publications

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“…Currently, ethanol produced from cellulose material provides the greatest advantage in terms of energy savings (the index of energy returned on energy invested is about 4.4-6.5 and continuously increases as conversion technology improves). [4] Another energy saving measure in drying processes is the generation of energy precisely in the place where it is needed; that is, directly in the zone of moisture evaporation to reduce energy loses in the auxiliary equipment; for instance, flame drying of textiles (Remaflam process). [5,6] A novel spray-drying method utilizing combustion of flammable components of the spray as an energy source for drying process-that is, flame spray drying (FSD)-has been developed at the Faculty of Process and Environmental Engineering, Lodz University of Technology.…”

Section: Introductionmentioning

confidence: 99%

Energy Consumption and Product Quality Interactions in Flame Spray Drying

2014

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The work presents the comparison of two spray drying techniques: conventional concurrent spray drying and novel spray drying technique; that is, flame spray drying (FSD) in terms of energy consumption and quality of final product. The amount of energy consumed to dry maltodextrin solutions showed that for similar moisture evaporation rate and equivalent operating parameters of the drying process, energy consumption was 5 to 30% lower in the FSD process. FSD produced lower bulk and apparent densities of maltodextrin powder and, due to shorter drying time, lower content of fractured particles in comparison with the classical spray drying process.

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Section: Introductionmentioning

confidence: 99%

Energy Consumption and Product Quality Interactions in Flame Spray Drying

2014

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“…[1] The energy consumption of this kind of kiln can therefore be evaluated quite accurately, provided the kiln has no significant defects, such as air leakages, thermal bridges or cold points, e.g., due to doors with poor maintenance or mistakes in the conception of the structure. The energy consumption can be divided into six components:…”

Section: The Computational Model Theoretical Evaluation Of the Energymentioning

confidence: 99%

“…[1] The effectiveness of this balance has been improved over the years based on empirical knowledge and is embedded in the drying schedules. The basic principle is to keep the relative humidity (RH) of the air high at the beginning of the process.…”

Section: Introduction a Short Presentation Of Conventional Kilnsmentioning

confidence: 99%

“…[1] Moreover, this sophisticated model is able to account for the standard deviation of the final moisture content (MC), which allows a compromise to be struck between quality, drying time, and energy consumption. In addition, this model can also be applied to test innovative, energy-saving drying strategies with an equivalent drying quality, i.e.…”

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confidence: 99%

“…This paper proposes a detailed analysis of the energy consumption evolution in conventional kiln drying using a sophisticated modelling approach. The formulation of energy consumption proposed by Perré et al [1] was embedded in a multiscale computational model to consider kiln drying of a stack of boards. The drying of each board in the stack is simulated using a full version of a heat and mass transfer code (the 1-D version of TransPore), which allows all boards to be different and facilitates consideration of wood variability, in addition to the effect of position within the stack.…”

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confidence: 99%

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Energy Consumption in the Convective Drying of Timber Analyzed by a Multiscale Computational Model

et al. 2012

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Energy consumption during timber drying has become an increasingly important issue, alongside conventional concerns such as quality, cost, and drying time. This paper proposes a detailed analysis of the energy consumption evolution in conventional kiln drying using a sophisticated modelling approach. The formulation of energy consumption proposed by Perré et al. [1] was embedded in a multiscale computational model to consider kiln drying of a stack of boards. The drying of each board in the stack is simulated using a full version of a heat and mass transfer code (the 1-D version of TransPore), which allows all boards to be different and facilitates consideration of wood variability, in addition to the effect of position within the stack.For simple configurations, the energy consumption predicted by this complex computational tool is in agreement with the global approach. [1] Moreover, this sophisticated model is able to account for the standard deviation of the final moisture content (MC), which allows a compromise to be struck between quality, drying time, and energy consumption. In addition, this model can also be applied to test innovative, energy-saving drying strategies with an equivalent drying quality, i.e. sorting boards of similar properties before drying, or sorting boards at the end of drying to re-dry those boards that have a final MC that is still too high.

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