Untersuchungen zur Permeabilität von Faser-, Span- und OSB-Matten für Gase

Haas, G. v.; Steffen, A.; Frühwald, A.

doi:10.1007/s001070050338

Cited by 10 publications

(4 citation statements)

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“…As in previous studies, , the following relationship is used: Initial comparisons between model predictions and the experimental data without any fitting are presented in Figures and . Different model predictions are shown depending on whether the permeability−porosity relationship reported by Zombori et al., Marceau, or von Haas et al is used. Regardless of the relationship used, significant discrepancies between the predicted and measured profiles are apparent.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, the effects of porosity and density on permeability were explicitly addressed. Much work has been done in relating permeability to board density or porosity. − However, this approach has generally involved measuring the permeability of a finished board at room temperature once it has been removed from a press. Previous models on transport processes occurring during pressing have been based on the permeability values for finished boards. − Large discrepancies between experimental data for temperature and pressure within the panels and numerical predictions were obtained using this approach, similar to those shown in Figures and .…”

Section: Resultsmentioning

confidence: 99%

“…Much work has been done in relating permeability to board density or porosity. [18][19][20][21][22][23][24][25][26] However, this approach has generally involved measuring the permeability of a finished board at room temperature once it has been removed from a press. Previous models on transport processes occurring during pressing have been based on the permeability values for finished boards.…”

Section: Comparison Of the Model Predictions To Industrial Plant Datamentioning

confidence: 99%

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Simulation and Optimization of the Continuous Oriented Strand Board Pressing Process

Lee

Budman

Pritzker

2006

Ind. Eng. Chem. Res.

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This study has the following two objectives: (1) development of a 3-dimensional steady-state model for heat and mass transfer during continuous pressing of oriented strand board (OSB) and comparison with data from an industrial operation and (2) optimization of operating conditions for continuous pressing. An extensive sensitivity analysis indicates that the dependency of the permeability on the board density is crucial for better prediction of the temperature and pressure values measured in the mat during pressing and may explain discrepancies between data and numerical predictions reported in previous studies. Once the model is calibrated to experimental data, a genetic algorithm is employed to optimize the overall hot-pressing of OSB by determining conditions that maximize the operating profit, while ensuring that delamination is prevented and sufficient resin curing is achieved. This algorithm is shown to determine operating conditions that result in a higher profit than that obtained by the current practice of the industrial operation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Comparison Of the Model Predictions To Industrial Plant Datamentioning

confidence: 99%

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Simulation and Optimization of the Continuous Oriented Strand Board Pressing Process

Lee

Budman

Pritzker

2006

Ind. Eng. Chem. Res.

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“…Direct measurements of the permeability as a function of density have been reported, among others, by von Haas et al [1], Garcia and Cloutier [2] and Thoemen 3 and Klueppel [3], and experimental work to determine the thermal conductivity of wood-furnish mats was done by Shao [4], von Haas [5] and Klueppel [6]. Please note that only those works are listed here where a homogeneous density distribution within the samples were used, which is a requirement to obtain a quantitative relationship between the respective property and density.…”

Section: Introductionmentioning

confidence: 96%