Heat Transfer Analysis of Timber Windows with Different Wood Species and Anatomical Direction

Ahn, Namhyuck; Park, Sanghoon

doi:10.3390/en13226050

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…± St. Dev. = 0.18 ± 0.06)[18,124,125]. For wood chars, the situation is much more difficult because only a few studies provided those parameters, and that includes only for a few species (Longitudinal (n = 13) -Min.…”

mentioning

confidence: 99%

A meta-analysis of thermo-physical and chemical aspects in CFD modelling of pyrolysis of a single wood particle in the thermally thick regime

Maziarka

Anca-Couce

Prins

et al. 2022

Chemical Engineering Journal

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mentioning

confidence: 99%

A meta-analysis of thermo-physical and chemical aspects in CFD modelling of pyrolysis of a single wood particle in the thermally thick regime

Maziarka

Anca-Couce

Prins

et al. 2022

Chemical Engineering Journal

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“…Recently, most of the research has focused on particleboard materials and the optimization of wood performance [5][6][7][8][9][10]. Moslemi et al found that cellulose nanofibers can be extracted from rice straw and mixed with urea-formaldehyde adhesive for the production of medium density fiberboard (MDF) to optimize the rupture modulus, elastic modulus and internal bond strength of the MDF [11].…”

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confidence: 99%

Interaction and influence of a flow field and particleboard particles in an airflow forming machine with a coupled Euler-DPM model

et al. 2021

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Particleboards are widely used in the artificial board market, which can be constructed from a variety of raw materials and require small amounts of energy to be produced. In the particleboard production process, forming machines play an important role as the key equipment for achieving continuous production. In recent years, airflow forming machines have received increasing attention in particleboard production lines because of their strong separation ability and low price. However, the internal flow field is complex and difficult to control, which affects the surface quality and strength of the particleboard. The most pressing technical difficulty is controlling the flow field characteristics of the airflow paver. At present, the research on this subject is conducted primarily through repeated experiments, which entail long research periods and high processing costs. To reduce human and financial costs, in this study, Computational Fluid Dynamics (CFD) is employed to investigate the flow field and the gas-solid two-phase flow field coupled with particle movement of an airflow forming machine. The accuracy of the calculation model is verified by comparing characteristic point velocities obtained from experimental analysis and a simulation. The simulation results show that in practical production, the frequency of a negative pressure fan should be greater than 27 Hz. It is necessary to set the shoulder properly, and the slab smoothness can be improved by moving the shoulder back on the premise of meeting the strength requirements of the box. The distance between the shoulders of the box body should be less than 2570 mm, and particles with uniform diameter should be added to the paving box to reduce the turbulence effect, improve the quality of particle forming and provide actual particleboard production with a solid theoretical foundation.

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Heat Transfer Analysis of Timber Windows with Different Wood Species and Anatomical Direction

Ahn

Park

2020

Energies

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When assessing the hygrothermal performance of timber windows, it is important to apply the unique thermal conductivity of wood by each wood species as well as an anatomical direction within the same material as they affect the performance and long-term durability of products. A series of heat transfer analyses of window frames using THERM and WINDOW along with measurements on the thermal conductivity of five hardwoods using laser flash apparatus (LFA) was performed to compare and evaluate heat transmittance (U-value) and condensation resistance (CR) of three types of timber and hybrid timber windows. For each window type, 6.1 to 10.3% of the maximum difference in the heat transmittance among cases was calculated. Besides, a linear correlation was found between the U-value and the CR for most cases; thus, the selection of wood species and anatomical direction would improve the hygrothermal performance of timber windows overall. The results also indicated that there were some cases where the overall CR of windows did not improve because the U-value of the glazing system was not sufficiently low.

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Heat Transfer Analysis of Timber Windows with Different Wood Species and Anatomical Direction

Cited by 3 publications

References 16 publications

A meta-analysis of thermo-physical and chemical aspects in CFD modelling of pyrolysis of a single wood particle in the thermally thick regime

A meta-analysis of thermo-physical and chemical aspects in CFD modelling of pyrolysis of a single wood particle in the thermally thick regime

Interaction and influence of a flow field and particleboard particles in an airflow forming machine with a coupled Euler-DPM model

Heat Transfer Analysis of Timber Windows with Different Wood Species and Anatomical Direction

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