Superheated Steam Drying of Single Wood Particles: Modeling and Comparative Study with Hot Air Drying

Le, Kieu Hiep; Tran, Thi Thu Hang; Tsotsas, Evangelos; Kharaghani, Abdolreza

doi:10.1002/ceat.202000133

Cited by 8 publications

(5 citation statements)

References 45 publications

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“…The finite volume method is applied to solve the conjugated heat and mass transfer equations ( 1) and ( 2) numerically. A description of the discretization procedure was presented in the previous studies [19,20]. A sensitive study is conducted to check the mesh independence solution.…”

Section: Methodsmentioning

confidence: 99%

Determine effective moisture diffusivity of non-isothermal drying process of shrinkage material

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Drying is a dehydration process that can help to prolongate storage time, improve product quality, and reduce transportation cost. Although being applied for food processing for a long time, the drying process still needs to be further investigated for optimizing the dryer design and operations. Among the thermal physical properties of food material, the effective diffusivity of moisture is an essential input parameter for drying process calculation. This parameter is traditionally estimated by fitting the drying curve with the mathematical solution obtained from the isothermal drying process for a non-shrinkage material. Hence, the predicted moisture content and temperature evolutions over time deviate significantly compared to the experimental observation. In this paper, the moisture diffusivity is computed using the inverse method. Firstly, a diffusion drying model, in which the material shrinkage is accounted for, was developed. The effective moisture diffusivity was obtained via an optimization routine where the deviation between the numerical and experimental moisture content profiles is minimized. This methodology has been applied to estimate the diffusivity of carrots during classical and ultrasonic-assisted convective drying. The results indicated that the experimental observation can be accurately predicted by the numerical result.

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Section: Methodsmentioning

confidence: 99%

Determine effective moisture diffusivity of non-isothermal drying process of shrinkage material

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…For an example, this method is applied for single wood particle drying process in superheated steam environment. The detail description of the geometrical information, initial and boundary conditions is presented in Le et al [19]. The effective diffusivity of 6.633 Â 10 À9 m 2 /s determined using the experimental data observed at a drying temperature of 140°C can be used reliable for a large range of drying temperature as shown in Figure 7.…”

Section: Diffusion Modelmentioning

confidence: 99%

Multiscale Modeling of Non-Isothermal Fluid Transport Involved in Drying Process of Porous Media

Le¹

2021

Porous Fluids - Advances in Fluid Flow and Transport Phenomena in Porous Media

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To preserve the product quality as well as to reduce the logistics and storage cost, drying process is widely applied in the processing of porous material. In consideration of transport phenomena that involve a porous medium during drying, the complex morphology of the medium, and its influences on the distribution, flow, displacement of multiphase fluids are encountered. In this chapter, the recent advanced mass and energy transport models of drying processes are summarized. These models which were developed based on both pore- and continuum-scales, may provide a better fundamental understanding of non-isothermal liquid–vapor transport at both the continuum scale and the pore scale, and to pave the way for designing, operating, and optimizing drying and relevant industrial processes.

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“…Different heat and mass transfer equations were developed to predict the change and distribution of the moisture content and temperature at different drying stages. Both the two‐dimensional pore network model and the reaction engineering methodology were also efficient in predicting moisture content and temperature (Le et al, 2017; Le et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Both the two-dimensional pore network model and the reaction engineering methodology were also efficient in predicting moisture content and temperature (Le et al, 2017;Le et al, 2021).…”

mentioning

confidence: 99%

Simulation and experimental study on the effect of deformation on heat and mass transfer in potato chips during superheated steam drying

Fu,

Zheng,

Ren

et al. 2023

J Food Process Engineering

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Superheated steam drying is a drying technology with enormous potential and numerous advantages. Volume change and substantial deformation will occur on the materials to be dried during the superheated steam drying, which would affect the heat and mass transfer of the sample. However, the influence mechanism is not clear. Therefore, the nonuniform volume change of potato slices was studied, and the deformation model (DM) and the non‐DM (NDM) were constructed and verified to study the heat and mass transfer processes of the sample. The results showed that there was little difference between the measured and simulated temperatures based on DM and NDM with a maximum error of 4.22% and 5.03%, respectively, but there was obvious difference between simulated moisture contents with a maximum error of 5.76% and 12.21%, respectively. The volume in DM was in good agreement with the experimental data. Temperature distribution and moisture distribution in potato chips during superheated steam drying were nonuniform and the maximum temperature gradient and moisture gradient appeared in the early period. The moisture gradient existed in the whole drying process, and the stress caused by the moisture gradient was the main factor causing the drying deformation.Practical applicationsThis work can reveal that the volume change and substantial deformation have a significant impact on the heat and mass transfer during drying. In production practice, there are many similar phenomena. The results would be helpful to understand the heat and mass transfer mechanism, optimize quality parameters to obtain better products in potato drying industry, and expand the applied range of the superheated steam drying technology.

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Superheated Steam Drying of Single Wood Particles: Modeling and Comparative Study with Hot Air Drying

Cited by 8 publications

References 45 publications

Determine effective moisture diffusivity of non-isothermal drying process of shrinkage material

Determine effective moisture diffusivity of non-isothermal drying process of shrinkage material

Multiscale Modeling of Non-Isothermal Fluid Transport Involved in Drying Process of Porous Media

Simulation and experimental study on the effect of deformation on heat and mass transfer in potato chips during superheated steam drying

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