EFFECTIVE MOISTURE DIFFUSIVITY MODELING OF SWEET LEMON SLICES

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KHANCHEGARDAN M.R.; RAFIEE SH.; KASHANI NEJAD M.; JAFARI S.M.

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Journal: Iranian Journal of Biosystems Engineering Year:2011 | Volume:42 | Issue:2 Page(s): 183-190

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Title

EFFECTIVE MOISTURE DIFFUSIVITY MODELING OF SWEET LEMON SLICES

Author(s)

KHANCHEGARDAN M.R. | RAFIEE SH. | KASHANI NEJAD M. | JAFARI S.M. | Issue Writer Certificate

Keywords

DRYING MODELINGQ2

MOISTURE DIFFUSIVITYQ2

FICK'S MODELQ2

SWEET LEMON SLICEQ2

THIN LAYERQ2

Abstract

Thin layer drying behavior of SWEET LEMON SLICE was experimentally investigated in a convective type dryer and the mathematical modeling performed, using THIN LAYER drying models given in literature. Drying experiments were conducted at inlet drying air temperatures of 40, 50, 60, 70 and 80oC; two slice thicknesses of 3 and 6 mm, and, at one drying air velocity of 0.5 m/s with three replications in each treatment. Page model was employed (according to their coefficients of correlation) to estimate the drying curves. The effects of drying air temperature on the model constants and coefficients were evaluated through a non-linear regression technique. The accuracy of the model was estimated according to three statistical parameters of: coefficient of determination (R2), Chi-square (X2) and Root Mean Square Error (RMSE). Results indicated that Page model could satisfactorily describe the drying curve of SWEET LEMON SLICEs with R2=0.99812, (X2)=0.0000518 and RMSE=0.003912 for a thickness of 3 mm while R2=0.997776, (X2)=0.0000715 and RMSE=0.0082232 for a thickness of 6 mm. Moisture transfer from the slices was described by applying Fick's diffusion model. The effective diffusivity coefficient values changed from 8.04x10-9 to 7.63x10-8 m2/s for the range of temperatures considered. An Arrhenius relation with an activation energy value of 28.53 kJ/mol and the diffusivity constant of 5.01x 10-4 m2/s for a thickness of 3 mm, while 39.46 kJ/mol along with a diffusivity constant of 9.37x10-4 m2/s for a slice thickness of 6 mm, were obtained, indicating the effect of drying air temperature and slice thickness on the diffusivity parameter.

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APA: Copy

KHANCHEGARDAN, M.R., RAFIEE, SH., KASHANI NEJAD, M., & JAFARI, S.M.. (2011). EFFECTIVE MOISTURE DIFFUSIVITY MODELING OF SWEET LEMON SLICES. IRANIAN JOURNAL OF BIOSYSTEMS ENGINEERING (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), 42(2), 183-190. SID. https://sid.ir/paper/144362/en

Vancouver: Copy

KHANCHEGARDAN M.R., RAFIEE SH., KASHANI NEJAD M., JAFARI S.M.. EFFECTIVE MOISTURE DIFFUSIVITY MODELING OF SWEET LEMON SLICES. IRANIAN JOURNAL OF BIOSYSTEMS ENGINEERING (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)[Internet]. 2011;42(2):183-190. Available from: https://sid.ir/paper/144362/en

IEEE: Copy

M.R. KHANCHEGARDAN, SH. RAFIEE, M. KASHANI NEJAD, and S.M. JAFARI, “EFFECTIVE MOISTURE DIFFUSIVITY MODELING OF SWEET LEMON SLICES,” IRANIAN JOURNAL OF BIOSYSTEMS ENGINEERING (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), vol. 42, no. 2, pp. 183–190, 2011, [Online]. Available: https://sid.ir/paper/144362/en

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