Kinetics and mathematical modeling of thin layer drying of mint leaves by a hot water recirculating solar dryer

2019 ◽  
Vol 43 (1) ◽  
Author(s):  
Mehdi Moradi ◽  
Mohammad Ali Fallahi ◽  
Amin Mousavi Khaneghah
Keyword(s):  
Mathematical Modeling ◽  
Thin Layer ◽  
Hot Water ◽  
Solar Dryer ◽  
Thin Layer Drying

MATHEMATICAL MODELING OF THIN LAYER DRYING OF CANOLA PODS

2012 ◽  
Vol 3 (2) ◽  
pp. 297-312
Author(s):  
A. M. Matouk ◽  
H. N. Abd El-Mageed ◽  
A. Tharwat ◽  
S. E. El-Far
Keyword(s):  
Mathematical Modeling ◽  
Thin Layer ◽  
Thin Layer Drying

MATHEMATICAL MODELING OF THIN-LAYER DRYING OF JACKFRUIT LEATHER

2011 ◽  
Vol 35 (6) ◽  
pp. 797-805 ◽  
Author(s):  
M.M.I. CHOWDHURY ◽  
B.K. BALA ◽  
M.A. HAQUE
Keyword(s):  
Mathematical Modeling ◽  
Thin Layer ◽  
Thin Layer Drying

scholarly journals Mathematical modeling of thin layer drying using open sun and shade of Vernonia amygdalina leaves

2018 ◽  
Vol 52 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Oluwaseun Ruth Alara ◽  
Nour Hamid Abdurahman ◽  
Siti Kholijah Abdul Mudalip ◽  
Olusegun Abayomi Olalere
Keyword(s):  
Mathematical Modeling ◽  
Thin Layer ◽  
Vernonia Amygdalina ◽  
Thin Layer Drying ◽  
Sun And Shade

Desorption isotherms and mathematical modeling of thin layer drying kinetics of tomato

2015 ◽  
Vol 52 (3) ◽  
pp. 407-419 ◽  
Author(s):  
Amira Belghith ◽  
Soufien Azzouz ◽  
Afif ElCafsi
Keyword(s):  
Mathematical Modeling ◽  
Thin Layer ◽  
Drying Kinetics ◽  
Thin Layer Drying ◽  
Desorption Isotherms ◽  
Kinetics Of

scholarly journals Mathematical Modeling of Drying Pattern of Ogi Produced From Two Types of Maize Grain

2014 ◽  
Vol 4 (1) ◽  
pp. 174
Author(s):  
Bolaji O. T. ◽  
Olalusi A. P. ◽  
Adesina B. S.
Keyword(s):  
Mathematical Modeling ◽  
Experimental Data ◽  
Thin Layer ◽  
Moisture Ratio ◽  
Drying Rate ◽  
Drying Pattern ◽  
Thin Layer Drying ◽  
Drying Model ◽  
Maize Grain

<p>This paper presents thin layer modeling of <em>ogi</em> produced from yellow and white maize at varying soaking period and dried in the cabinet and oven at 50 ºC. The moisture decrease for cabinet dried o<em>gi</em> produced from white maize from 49.0 11.5%, 49.5 to 11.32%, 46.5 to 12.33% and 46.12.29%. The drying rate for both oven and cabinet dried <em>ogi</em> produced from yellow maize decreased from 4.6 to 0.0525 kg/min, 4.5 to 0.0513 kg/min, 4.35 to 0.049 kg/min and 4.4 to 0.047 kg/min while for oven dried <em>ogi</em> followed a similar trend. The experimental data obtained were fitted to five thin layer models: Newton, Page, Herderson and Pabis, Two term and Wingh and Singh models. The values obtained for <em>ogi</em> produced from white maize and dried in the cabinet and oven at 50 ºC for Newton model gave a lower R<sup>2</sup>, ?<sup>2</sup>, RMSE compared with respective values obtained from Page, Herderson and Pabis, two term, Wing and Singh models. The two terms model appear to be the best model among the five models used in this work and had higher R<sup>2</sup>, lower ?<sup>2</sup>, and RMSE. The <em>ogi</em> produced from yellow maize at varying soaking period of 24, 48, 72 and 96 hours and dried in cabinet dryer and fitted with two term showed model constants a, K<sub>0,</sub> b, K<sub>1</sub> 0.04315, 0.0388995, 0.919, 2.2 × 10<sup>-3</sup> while the R<sup>2</sup>, ?<sup>2 </sup>RMSE were 0.9933, 5.85 × 10<sup>-4</sup> and 4.85 × 10<sup>5 </sup>for <em>ogi</em> produced for 24 hours soaking, respectively. The soaking period does not seem to affect the moisture ratio and the thin layer drying model. However, the initial moisture and equipment seems to affect significantly.</p>

scholarly journals Mathematical modelling of the thin layer drying of pineapple (Ananas comosus, L.): experiment at village-scale in a greenhouse type solar dryer

2019 ◽  
Vol 20 (2) ◽  
pp. 1-10
Author(s):  
Ignacio López Cerino ◽  
Irineo Lorenzo López Cruz ◽  
Serm Janjai ◽  
Marcus Nagle ◽  
Busarakorn Mahayothee ◽  
...  
Keyword(s):  
Experimental Data ◽  
Moisture Content ◽  
Thin Layer ◽  
Large Scale ◽  
Linear Regression Analysis ◽  
Ananas Comosus ◽  
Solar Dryer ◽  
Thin Layer Drying ◽  
Best Fitting ◽  
Drying Curves

The objectives of this research were two: first to investigate experimentally the behavior of pineappl (Ananas comosus, L.) thin layer drying in a greenhouse-type solar dryer and second to describe the best fitting kinetic and mathematical model taken from literature. A large scale greenhouse dryer designed and installed at Silpakorn University, Nakhon Pathom, Thailand was used to dry slices 1 cm width at temperature range between 25-60 °C with relative humidity between 50-90%. Nine statistical models, either empirical or semi-empirical, were tested in order to validate the experimental data. A non-linear regression analysis conducted by a statistical computer program was applied to evaluate the constants of all the models. The parameter values, root mean square error (RMSE), mean absolute error (MAE) and modelling efficiency (EFF) of the nine models were calculated. Comparison outcomes of two experiments are displayed between the predicted moisture content and the observed pineapple moisture content. Hasibuan and Daud drying model proved to describe the best pineapple solar drying curves. The two experiments were carried out on sunny days, the second experiment on the third day showed cloudiness decreasing the solar radiation. Mathematical models of pineapple drying in a greenhouse dryer have not been found so far in the literature. Drying curves obtained from experiments showed that the constant drying and the falling drying rate periods exist. Nine thin-layer drying models were fitted to two experimental data in order to describe the drying characteristics of pineapple founding that the Hasibuan and Daud model was the best fitting.

Thin-Layer Mathematical Modeling of Turmeric in Indirect Natural Conventional Solar Dryer

2020 ◽  
Vol 142 (4) ◽  
Author(s):  
Masnaji R. Nukulwar ◽  
Vinod B. Tungikar
Keyword(s):  
Mathematical Modeling ◽  
Moisture Content ◽  
Thin Layer ◽  
Air Velocity ◽  
Drying Time ◽  
Sun Drying ◽  
Solar Dryer ◽  
Air Temperatures ◽  
Drying Efficiency ◽  
Kinetics Of

Abstract The objective of this study is to find an optimized thin-layer mathematical model suitable for drying kinetics of turmeric. Turmeric has a high moisture content which necessitates effective drying. A 10 kg, sample batch, of turmeric was dried in a solar dryer. Drying air temperatures and air velocity were observed in the range of 55 °C–68 °C and 0.7 m/s–1.4 m/s, respectively, in the drying experiments. It is seen that the moisture content of the turmeric is reduced from 77% to 11.93% in 22 h when compared with open sun drying, which required 60 h for the same reduction in the moisture content. Scheffler dish was used to generate steam for the dryer. Seven thin-layer mathematical models, cited in the literature, had been used for the study. These models were applied for different trays placed in the dryer. The result of the research and experimentation showed that the Page model fits best for drying in the steam-based dryer and open sun drying. Experimental results showed 63.33% saving in drying time, and the drying efficiency was found as 29.85%. Uncertainty in the drying efficiency was observed as 0.67%. Experimental investigation and the findings from the mathematical modeling are presented in this paper.

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