Numerical Study of the Drying of Cassava Roots Chips Using an Indirect Solar Dryer in Natural Convection

Simo-Tagne, Merlin; Tagne, Ablain Tagne; Ndukwu, Macmanus Chinenye; Bennamoun, Lyes; Akong, Marcel Brice Obounou; Marouani, Maryam El; Rogaume, Yann

doi:10.3390/agriengineering3010009

Cited by 19 publications

(6 citation statements)

References 33 publications

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“…Furthermore, this model has the potential of mitigating gross fossil (coal) CO 2 in Africa which is estimated at 1280,148 t of CO 2 annually. As well as, Simo‐Tagne et al., 2021 used an indirect solar dryer in natural convection for drying cassava root chips. A numerical study was proposed for performing heat and mass transfer using the thermophysical properties of cassava roots.…”

Section: Introductionmentioning

confidence: 99%

Development and evaluation of a hybrid smart solar dryer

Ibrahim,

Elsebaee,

Amer

et al. 2023

Journal of Food Science

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A hybrid smart solar dryer (HSSD) based on indirect forced convection and a controlled auxiliary heating system was developed, fabricated, and tested to be convenient for sunny and cloudy weather conditions. The achievements of the developed dryer focus on controlling the temperature of the dryer, increasing the drying rate, reducing energy consumption, and providing high‐quality products. The HSSD was tested and evaluated for drying basil and sage herbs at 30, 40, and 50°C. The results showed that the fresh basil and sage leaves of 1 kg with a moisture content of 84.7% and 75.53% (wet basis) were dried within 58, 46, 32 and 38, 28, and 20 h at 30, 40, and 50°C, respectively. Correspondingly, the traditional drying methods achieved 96 h outdoors and 144 h indoors at room temperature. The average of the fabricated flat‐plate solar collector efficiency (thermal efficiency, ηfpsc) was ranged from 49.18% ± 9.52% to 66.02% ± 2.8%. The highest drying rates were achieved with the HSSD method. Moreover, the HSSD method led to a remarkable saving in energy with values ranging from 25.54% to 77.1% versus the traditional drying methods. While the best quality in terms of essential oil content and microbial load for the dried basil and sage herbs was achieved by the HSSD at 40°C. Finally, the HSSD is a promising energy‐efficient method where it can save 70% of energy consumption, thus reducing the carbon footprint of drying processes, and providing higher quality products compared to the conventional methods.

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Section: Introductionmentioning

confidence: 99%

Development and evaluation of a hybrid smart solar dryer

Ibrahim,

Elsebaee,

Amer

et al. 2023

Journal of Food Science

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“…Thus, the energy-balance equations for the absorber, water inner and outer glass-cover, as well as PCM in the case of SS with PCM, were created and solved using MATLAB software, version 9.8 (R2020a, the MathWorks, Inc., USA). Th mathematical model based on the energy-balance equations for individual elements of the SS is a commonly used method of modeling for this type of system, and has been used by numerous researchers [37][38][39]. To simplify the model, the following assumptions wer made [34]: In order to compare the performance of the SS, three performance indicators were used: the water temperature, T w , the temperature difference between water and glass cover, ∆T, and the cumulative productivity, V. The cumulative productivity is the total amount of the distilled water produced in the SS over time.…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…Thus, the energy-balance equations for the absorber, water, inner and outer glass-cover, as well as PCM in the case of SS with PCM, were created and solved using MATLAB software, version 9.8 (R2020a, the MathWorks, Inc., Natick, MA, USA). The mathematical model based on the energy-balance equations for individual elements of the SS is a commonly used method of modeling for this type of system, and has been used by numerous researchers [37][38][39]. To simplify the model, the following assumptions were made [34]:…”

Section: Mathematical Modelingmentioning

confidence: 99%

Experimental and Theoretical Investigation of Single-Slope Passive Solar Still with Phase-Change Materials

et al. 2023

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Many attempts are made worldwide to create cheap, efficient, and eco-friendly water desalination systems. Passive solar stills (SS) are considered to be such. This paper presents the results of the experimental and theoretical investigation of the effects of using phase-change materials (PCM) on the performance of SS. The experiments were conducted for two paraffin waxes, as PCM and 1.0, 2.5, and 5.0 kg of PCM were used. The results of the experimental studies were used to validate a mathematical model, which was based on the energy balance ordinary differential equations. The equations were solved numerically since the approximate solutions obtained numerically are sufficient and relatively simple as compared to the exact analytical solutions. A theoretical analysis was then carried out and a novel and detailed dependence on the water evaporation rate as a function of water temperature and the difference between water and cover temperature was determined. It was also found that the productivity of the SS with PCM strongly depends on the operating conditions. For uniform initial temperatures of the SS, its productivity decreases with an increasing PCM-to-water mass ratio, and the maximum decrease is 10.8%. If the SS is not thermally insulated, the PCM can take the role of a thermal insulator and increase productivity by 1.1%, but there is an optimal PCM-to-water mass ratio. The greatest increase in productivity, by up to 47.1%, can be obtained when the PCM is heated outside the SS and inserted into the SS when the water temperature starts to decrease. In this case, the productivity increases with the increasing PCM-to-water mass ratio. These outcomes fill a knowledge gap caused by a lack of justification for why in some cases, the application of PCM fails to improve the productivity of SS.

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“…Drying involves the removal of moisture from the produce so as to increase the shelf life, decrease microbial activities and improve the quality of the product. Sundrying is one of the popular and oldest method that has been applied for the drying of agricultural produce (Murugan & Saji Raveendran, 2021;Omonegho et al, 2023;Simo-Tagne et al, 2021). However, direct sundrying exposes the produce to insect contamination and dust.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Drying Characteristics of Tapioca Under Solar Drying Condition

Emehute,

Amagre,

Owebor

et al. 2024

JERISD

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Agricultural products are subjected to one form of processing or the other, to either improve the shelf life of the products, or as a necessary condition before consumption. Solar drying is one method that helps to increase the shelf life of agricultural products. In this study, an experimental investigation of the drying characteristics of cassava chips popularly called tapioca was carried out for the purpose of improved shelf life and hygiene, under solar drying conditions in the month of December, 2023. An analysis of key parameters was conducted on the experimental data and post-processed in the Microsoft Excel environment. The results suggested that the moisture removal rate of tapioca was 0.2183 % to 6.3829% on dry mass basis, with cumulative drying time of 27hours in three days. The maximum and minimum energy values during the drying period were 15485.14kJ and 9.6243kJ, respectively. Thus, the average value obtained for solar collector efficiency varied from 6.99 % to 16.89 %. The study also established that the colour and texture of the tapioca under the drying conditions could be retained.

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Numerical Study of the Drying of Cassava Roots Chips Using an Indirect Solar Dryer in Natural Convection

Cited by 19 publications

References 33 publications

Development and evaluation of a hybrid smart solar dryer

Development and evaluation of a hybrid smart solar dryer

Experimental and Theoretical Investigation of Single-Slope Passive Solar Still with Phase-Change Materials

Experimental Investigation of the Drying Characteristics of Tapioca Under Solar Drying Condition

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