Scientists have made a sunshine dryer for slices of Mango, with PV-driven forced convection. They place Mango slices of different thicknesses in it, they have measured the operation of their device against two reference methods and have discovered that thermal efficiency achieved 30%.
A research group led by scientists from Matttu University in Ethiopia has developed and analyzed a solar cabinet dryer for mangoblaks, with PV-driven forced convection. To tackle the poor thermal efficiency of previously reported cupboards, the team has included rectangular Scots in the setup.
“Built using locally available materials, the dryer in Kaststijl is optimized for small farmers in a low income, which supplies both affordability and high -quality dried products due to shorter drying times and controlled dry conditions,” said the corresponding author Ermias A. Tesema PV -Magazine. “The bewildered design improved energy efficiency, improving air flow and drying uniformity. This leads to faster drying with better product quality with the help of clean, renewable solar technology.”
The sunshine was built from 18 mm thick wooden plates, with 0.8 mm steel sheets used as absorber plates. The collector had a length of 1.6 m and a width of 90 cm, with four rectangular bulkheads of 67.5 cm. The drying chamber included three drawers with a length of 60 cm and a width of 90 cm, with a 50 cm chimney. A PV module and a battery were placed next to the structure, with an air heating and a fan.
Mango slices with thicknesses of 3 mm, 5 mm and 7 mm were prepared for the experiment. The thickness of each mango was tested under different scenarios, namely in a sunshine with bulkheads, in a sunshine without bulkheads and via the open-zons drying technique. The experiments took place in Bahir Dar, North Ethiopia, from September to December, with the mangos being mature for five days before they dry.
“The bewildered dryer achieved a thermal efficiency of 29-30%, a remarkable improvement in relation to typical non-generated designs. Using baffles and thinner slices (3 mm) the vitamin C-retention improved (maximum 255 mg/100 g), rehydratieStio, while the dratierstication, while the dratier dervation becomes Compared to the dry time, and the color of the color, and the color of the color, and the color of the dry time, and the color of the dry, and the color of the dry, and the color of the color of the color. Induced formation of new phenol connections. “
Concluding, Tesema said that “future work will focus on further optimization of baffle geometry and positioning using Computational Fluid Dynamics (CFD) modeling to maximize airflow uniformity and heat transfer. We also aim to integrate hybrid energy sources such as biomass or photovoltaic backup for continuous Drying Duration Cloudy Or Nighttime Conditions, and to Evaluate the System with Other Tropical Fruits Like Pineapple and Papaya. ”
The system was presented in “Design, development and performance -evaluation of bewildered Solar Mango Slice Dryer“Published in Case studies in thermal engineering. Researchers at Matttu University of Ethiopia, Bahir Dar University, Oda Bultum University and the Leibniz Institute for Agricultural Engineering and Bio -Economics (ATB) of Germany participated in the study.
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