Drying uniformity analysis of an indirect solar dryer based on computational fluid dynamics and image processing

Benhamza, Abderrahmane; Boubekri, Abdelghani; Atia, Abdelmalek; Hadibi, Tarik; Arıcı, Müslüm

doi:10.1016/j.seta.2021.101466

Cited by 26 publications

(9 citation statements)

References 45 publications

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“…At air velocities lower than 1.2 m/s the effect of air velocity is significant. To study the distribution of air inside solar dryers CFD techniques are widely used [ 20 , 21 , 22 , 23 ]. Relying on experimental results of different flow parameters costs huge resource due to the required number of experiments.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of mixed-mode solar dryer with vertical air distribution channel

Sileshi

Hassen

Adem

2022

Heliyon

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Section: Introductionmentioning

confidence: 99%

“…However, the application of CFD can reduce the cost involved in the experiment [ 11 ]. Recently different studies implemented CFD to improve the performance of solar dryers [ 20 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ]. Demissie et al.…”

Section: Introductionmentioning

confidence: 99%

Simulation of mixed-mode solar dryer with vertical air distribution channel

Sileshi

Hassen

Adem

2022

Heliyon

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“…The high cost of traditional energy resources makes it increasingly necessary to use alternative energy sources to reduce energy intensity and increase the efficiency of technical equipment in agricultural production [7][8][9][10][11][12][13][14][15][16][17][18]. Combined types of dryers with different sources of thermal energy are often used [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Heat Balance of Combined Heat Exchanger Aerodynamic Heating Dryers

Купреенко¹,

Isaev²,

Kuznetsov³

et al. 2022

adeletters

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Today, the use of aerodynamic dryers for drying various types of fruit crops is very current. In them, the electric energy spent on the drive of the centrifugal fan is transformed into thermal energy due to the mutual friction of the air flows circulating in the closed chamber. In order to increase the energy efficiency of the drying process, the heat of the waste drying agent was used in the research. The presented dryer was equipped with a combined heat exchanger. In order to predict the thermal performance of the combined heat exchanger depending on external factor variables, the dependence of the temperature of the fresh drying agent at the outlet of the combined heat exchanger on the dryer operation time is theoretically determined on the basis of the heat balance equation. The air solar collector in the combined heat exchanger made it possible to increase the temperature of the drying agent at the outlet by another 10oC without extra costs of electrical energy. A comparative analysis of the results of experimental and theoretical studies showed their high convergence.

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“…Most solar dryers let out exhaust air which collected moisture from the produce to be dried through a chimney. The air passes through the drying chamber and then flows out through the chimney due to the buoyancy effect or stack effect [28].…”

Section: Introductionmentioning

confidence: 99%

The Effects of roof angle, inlet gap size and drying time on dryer mass flow rate and moisture content in a chimney-dependent solar crop dryer using design of experiments (DOE)

Agyei-Agyemang¹,

Tawiah²,

Afriyie³

et al. 2022

QJES

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A chimney dependent solar crop dryer (CDSCD) was designed and developed. Design of Experiments (DOE) was used to carry out experiments using a statistical three level non randomized factorial experimental design in Minitab statistical software version 19.0. The effect of three drying parameters, roof angle (º), Inlet gap size (mm), and time (h) on dryer inlet mass flow rate (kg/s) and moisture content (%) were studied. The regression results showed that there was a satisfactory fit of the model variability for both dryer inlet mass flow rate and crop moisture content. The p-value for each parameter was less than 0.005, which is statistically significant. The R-squared (R2) value was 94.67% for inlet air mass flow rate study and 99.72% for moisture content. It was observed that the optimal values for achieving a low moisture content response (≤ 24%) were roof angle of 81º, inlet to outlet cross-sectional area ratio of 1.08768:1 and a minimum drying time of 24 hours while the optimal values for achieving high inlet air mass flow rate (≥ 0.357 kg/s) were roof angle of 51º, inlet to outlet cross-sectional area ratio of 1.08768:1 and a minimum drying time of 5 hours. The findings could be implemented and utilized for achieving optimum ventilation and drying performances to refine dryer (CDSCD) design.

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Drying uniformity analysis of an indirect solar dryer based on computational fluid dynamics and image processing

Cited by 26 publications

References 45 publications

Simulation of mixed-mode solar dryer with vertical air distribution channel

Simulation of mixed-mode solar dryer with vertical air distribution channel

Heat Balance of Combined Heat Exchanger Aerodynamic Heating Dryers

The Effects of roof angle, inlet gap size and drying time on dryer mass flow rate and moisture content in a chimney-dependent solar crop dryer using design of experiments (DOE)

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