<i>Applying thin-layer drying principles to optimize solar drying of apples</i>

2018 ◽  
Keyword(s):  
Thin Layer ◽  
Solar Drying ◽  
Thin Layer Drying

scholarly journals Thin-layer mathematical modeling of apple slices drying, using open sun and cabinet solar drying methods

2021 ◽  
Vol 4 (2) ◽  
pp. 43-52
Author(s):  
Abdul Wasim Noori ◽  
Mohammad Jafar Royen ◽  
Juma Haydary
Keyword(s):  
Thin Layer ◽  
Mathematical Models ◽  
Water Activity ◽  
Model Fitting ◽  
Coefficient Of Determination ◽  
Drying Methods ◽  
Solar Drying ◽  
Drying Time ◽  
Climate Conditions ◽  
Thin Layer Drying

This paper aims to investigate the effect of climate conditions such as ambient temperature, humidity, pressure, sun radiation and pollution on sliced apples quality and drying time which are dried in an indirect forced cabinet solar drying (IFCSD) and open sun drying (OSD) systems. Both experiments were implemented at same place (Kabul, Afghanistan) and time. The IFCSD yield for saving time is 42.8 % which is more effective than drying in the OSD system. Simultaneously with the decreasing of sliced apple weight from 512.9 g down to 73.9 g, the water activity decreased from 0.955 down to 0.355 in the IFCSD system. For OSD system, the sample weight decreased from 512.6 g down to 78.4 g and its water activity from 0.955 down to 0.411. On the experiment day the average sun radiation was 571 w/m2 . The pressure drop between inlet and outlet of the dryer was 0.1 kPa. Different thin-layer mathematical models were investigated to identify the best model fitting the experimental data. The mathematical models’ performances were investigated by comparing the coefficient of determination (R 2 ), reduced chi-square (X2 ) and root mean square error (RMSE) coefficients. From all 11 applied thin-layer drying models the Page, Approximation diffusion, Verma et al and Midilli and Kacuk models are more fitted to our data.

Mathematical Modelling of Thin Layer Sun and Solar Drying of Cassava Chips

2010 ◽  
Vol 6 (6) ◽  
Author(s):  
Toyosi Y Tunde-Akintunde
Keyword(s):  
Thin Layer ◽  
Correlation Coefficients ◽  
Moisture Diffusivity ◽  
Solar Drying ◽  
Drying Time ◽  
Drying Characteristics ◽  
Page Model ◽  
Thin Layer Drying ◽  
Rate Period ◽  
Pretreatment Conditions

In this paper, the effect of sun and solar drying and pretreatment conditions (soaking in water; soaking in water and then blanching; blanching and then soaking) on the drying characteristics and kinetics of cassava chips were investigated. The drying time was shorter for samples pretreated by soaking only (SK) compared to the others. It was observed that pretreatment conditions and drying method significantly (P < 0.05) affected the drying rate. The drying for all experiments occurred in the falling rate period with no constant rate period. Four mathematical models were studied for the description thin layer drying characteristics of pretreated cassava chips. The models considered were the Henderson and Pabis, Newton, Logarithmic and the Page model. Comparing the correlation coefficients (R2), chi-square (c2) and root mean square error (RMSE) values of four models, it was observed that the highest values of R2 and lowest ?2 and RMSE were obtained using Page model. This shows that the Page model represents drying characteristics better than other models. The effective moisture diffusivity values were estimated from Fick’s diffusional model. These values obtained for solar dried samples were generally higher than those obtained for sun dried samples.

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

scholarly journals Thin-layer drying behavior of West Indian lemongrass (Cymbopogan citratus ) leaves

2018 ◽  
Vol 6 (4) ◽  
pp. 1085-1099 ◽  
Author(s):  
Saheeda Mujaffar ◽  
Sherida John
Keyword(s):  
Thin Layer ◽  
West Indian ◽  
Thin Layer Drying ◽  
Drying Behavior ◽  
Cymbopogan Citratus

Mathematical modelling of the thin layer solar drying of sweet potato slices

Solar Energy ◽  
1993 ◽  
Vol 51 (4) ◽  
pp. 271-276 ◽  
Author(s):  
L.M. Diamante ◽  
P.A. Munro
Keyword(s):  
Mathematical Modelling ◽  
Thin Layer ◽  
Sweet Potato ◽  
Solar Drying ◽  
Potato Slices

Studies on thin layer drying of bagasse

2007 ◽  
Vol 31 (4) ◽  
pp. 422-437 ◽  
Author(s):  
B. Vijayaraj ◽  
R. Saravanan ◽  
S. Renganarayanan
Keyword(s):  
Thin Layer ◽  
Thin Layer Drying

Optimization of a thin layer drying process for coroba slices

2008 ◽  
Vol 85 (3) ◽  
pp. 372-380 ◽  
Author(s):  
Otoniel Corzo ◽  
Nelson Bracho ◽  
Alberto Vásquez ◽  
Angel Pereira
Keyword(s):  
Thin Layer ◽  
Drying Process ◽  
Thin Layer Drying

Evaluation of the mass transfer process on thin layer drying of papaya seeds from the perspective of diffusive models

2017 ◽  
Vol 54 (2) ◽  
pp. 463-471
Author(s):  
Guilherme Luiz Dotto ◽  
Lucas Meili ◽  
Eduardo Hiromitsu Tanabe ◽  
Daniel Padoin Chielle ◽  
Marcos Flávio Pinto Moreira
Keyword(s):  
Mass Transfer ◽  
Thin Layer ◽  
Transfer Process ◽  
Mass Transfer Process ◽  
Thin Layer Drying ◽  
Papaya Seeds

scholarly journals Thin layer drying of zucchini in solar dryer located in Osmaniye region

2018 ◽  
Vol 12 (2) ◽  
pp. 79-85 ◽  
Author(s):  
Kamil Neyfel Çerçi ◽  
Özge Sufer
Keyword(s):  
Thin Layer ◽  
Linear Regression Analysis ◽  
Chi Square ◽  
Mathematical Expressions ◽  
Thin Layer Drying ◽  
Drying Models ◽  
Drying System ◽  
Thin Layer Drying Models ◽  
Dehydration Behavior ◽  
And Diffusion

In this study, the dehydration behavior of zucchini using solar assisted drying system was examined according to 22 thin layer drying models available in literature. The correlation coefficient (R2), chi-square (χ2) and root mean square error (RMSE) values were calculated to check the suitability of models by non-linear regression analysis. It was found that Cubic and Modified Midilli-1 models were the most suitable equations and their R2 values were calculated as 0.99963. χ2 and RMSE values of related mathematical expressions were 1.89343×10‒5, 1.91692×10‒5 and 0.01685×10‒3, 0.01721×10‒3 respectively. In addition, heat transfer, mass transfer and diffusion coefficients, which were important parameters in design of drying systems were also determined as 5.18124 W/m2°C, 1.57129×10‒7 m/s and 2.335718×10‒9 m2/s respectively.

scholarly journals Suitable model for thin-layer drying of root vegetables and onion

2020 ◽  
Vol 1 (34) ◽  
pp. 79-86 ◽  
Author(s):  
Krzysztof Górnicki ◽  
Agnieszka Kaleta ◽  
Aneta Choińska
Keyword(s):  
Thin Layer ◽  
Suitable Model ◽  
Thin Layer Drying ◽  
Root Vegetables
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