Bulk Thermal Conductivity and Diffusivity of Soybean

Deshpande, S. D.; Bal, Satish; Ojha, Tamoghna

doi:10.1111/j.1745-4549.1996.tb00741.x

Cited by 33 publications

(23 citation statements)

References 16 publications

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“…The linear and positive behavior of thermal diffusivity as a function of moisture content was similar to that reported by Deshpande and Bal (). These authors found for soybeans, values of thermal diffusivity in the range between 8.17 × 10 −8 and 8.53 × 10 −8 m 2 /s.…”

Section: Resultssupporting

confidence: 89%

Physical properties and effective thermal diffusivity of soybean grains as a function of moisture content and broken kernels

Pohndorf

Rocha

Lindemann

et al. 2017

J Food Process Engineering

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The objective of this work was to evaluate the influence of the amount of broken kernels in relation to the whole grains (0, 15, and 30%) and moisture content (5, 10, and 15% wet basis) on some physical properties of soybeans (bulk density, porosity, and angle of repose) using response surface methodology. In addition, the effective thermal diffusivity (αef) was determined and empirical models were proposed to improve equipment design and drying and storage operations of soybeans. The results indicated that the moisture content changes and the addition of broken kernels in the whole soybeans caused increases in bulk density (from 673 ± 2 to 693 ± 3 kg/m3) and angle of repose (from 26.6 ± 0.3 to 31.2 ± 0.3 °) and decrease in porosity (from 45.1 ± 0.1 to 41.3 ± 0.4%). The effective thermal diffusivity values increased with increasing moisture content and the addition of broken kernels, in the range of 5.7 × 10−8 to 9.5 × 10−8 m2/s. The proposed empirical model for determination of effective thermal diffusivity was predictive and significant (p < .05). Practical applications The presence of split and broken soybeans has been a problem due to the lack of uniformity of stored grain mass, causing significant loss of quality and difficulty in operational handling. In this way, the knowledge of the engineering properties of soybeans is a key factor in determining the design of the drying, storage, aeration, processing, and handling systems. Bulk density is needed for the design of drying and aeration systems. Porosity can affect the rate of heat and mass transfer during aeration and drying operations and the design of hoppers for processing machinery and bulk grain storage requires angle of repose data. In addition, the thermal diffusivity elutes the heating rate of grains stored in steel silos.

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Section: Resultssupporting

confidence: 89%

Physical properties and effective thermal diffusivity of soybean grains as a function of moisture content and broken kernels

Pohndorf

Rocha

Lindemann

et al. 2017

J Food Process Engineering

View full text Add to dashboard Cite

show abstract

“…Bulk density of soybeans was assumed as constant and temperature independent during the simulated process. The bulk thermal conductivity and heat capacity values of soybeans were measured and reported by Deshpande, Bal, and Ojha (1996) and Deshpande and Bal (1999). Dielectric properties of soybeans at its particle density and 27 MHz were obtained from Guo et al (2010) in the range of 20-80°C.…”

Section: Physical Properties Of Samplesmentioning

confidence: 99%

“…5b) of soybeans, which increased with increasing temperature at moisture contents of 4.64 and 7.86% w.b. (Deshpande & Bal, 1999;Deshpande et al, 1996). These data were subjected to linear regression analysis (R 2 N 0.99) at temperature range of 20-80°C for using these properties in the simulation model.…”

Section: Model Parametersmentioning

confidence: 99%

Computational modelling of the impact of polystyrene containers on radio frequency heating uniformity improvement for dried soybeans

Huang

Zhang

Marra

et al. 2016

Innovative Food Science & Emerging Technologies

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“…The bulk density of dry soybeans at room temperature was measured by a basic volume method using a 30 Â 22 Â 6 cm 3 plastic rectangular container and obtained to be 739 ± 3 kg/m 3 over three replicates. Thermal properties (thermal conductivity and specific heat) at a bulk density of 739 kg/m 3 were calculated by Deshpande's regression equations [33,34]. Thermal properties of the insect larvae were reported by Ben-Lalli et al and Sahin and Sumnu with different measured components [32,35].…”

Section: Materials Properties Measurementmentioning

confidence: 99%