Effective moisture diffusivity during hot air solar drying of tomato slices

H. Samimi. Akhijani, A. Arabhosseini and M.H. Kianmehr
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H. Samimi. Akhijani: Department of Agrotechnology, University of Tehran, College of Abouraihan, Tehran, Iran
A. Arabhosseini: Department of Agrotechnology, University of Tehran, College of Abouraihan, Tehran, Iran
M.H. Kianmehr: Department of Agrotechnology, University of Tehran, College of Abouraihan, Tehran, Iran

Research in Agricultural Engineering, 2016, vol. 62, issue 1, 15-23

Abstract: Mathematical modelling and effective moisture diffusivity of tomato (Lycopersicon esculentum) was studied during hot air solar drying. An experimental solar dryer with a swivel collector was used for experiments. The collector followed the solar radiation using a precious sensor. Drying experiments were performed in a thin layer hot air drying at slice thicknesses of 3, 5 and 7 mm and air velocities of 0.5, 1 and 2 m/s. The experimental data were fitted to different mathematical moisture ratio models and the Page model was selected as the best model according to correlation coefficient R2, chi-square χ2 and root mean square error (RMSE) parameters. The maximum values of moisture diffusivity was 6.98 × 10-9 m2/s at air velocity of 2 m/s and slice thickness of 7 mm while the minimum value of the moisture diffusivity was 1.58 × 10-9 m2/s at air velocity of 0.5 m/s and slice thickness of 3 mm.

Keywords: falling rate period; Fick's second law; mathematical models; solar dryer; swivel collector (search for similar items in EconPapers)
Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlrae:v:62:y:2016:i:1:id:33-2014-rae

DOI: 10.17221/33/2014-RAE

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