Design and Development of Walk-In Type Hemicylindrical Solar Tunnel Dryer for Industrial Use

Seveda, Mahendra S.

doi:10.5402/2012/890820

Cited by 15 publications

(4 citation statements)

References 14 publications

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“…in 8 h [17]. Critical design specifications and field performance of a walk-in type hemicircular solar tunnel dryer for drying 1500 kg of industrial products were reported by Seveda, Damena et al, and Qin et al [9,22,23].…”

Section: Introductionmentioning

confidence: 93%

“…Understanding many physical and biological processes requires detailed information on the availability of solar radiation on the earth's surface [6][7][8]. In Ethiopia, solar energy is used for domestic and commercial water heating in major cities, as well as solar electricity for tele-communication stations, lighting systems for households, cooking, drying grains (traditionally), and water supply in rural areas, and even refrigerating medicine in health centers [9][10][11][12][13][14][15]. In most areas, the farmers or institutions grow fruit and vegetables that have to be sold in the market immediately after harvesting.…”

Section: Introductionmentioning

confidence: 99%

“…Solar drying research in African countries is often low, and it requires expenditure to boast about it. In the experimental study, it was observed that high temperatures and lower relative humidity could enable inactivation of weevils of maize from field infestation due to accumulation of heat from solar irradiation and moisture migration from the insect pests at lower relative humidity [9,18].…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and Performance Evaluation of Solar Tunnel Dryer for Ginger Drying

Tesfaye

Habtu

2022

International Journal of Photoenergy

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A series of tests were conducted to investigate the performance of a solar tunnel dryer for drying ginger. To supply hot air to the dryer, two axial flow fans with a power rating of 28 W, a supply voltage of 220 V, and a 50 W photovoltaics (PV) module were employed. By dividing the 8.5-meter-long solar tunnel dryer into four equal portions every thirty minutes, solar radiation, dry air temperature, ambient temperature, relative humidity, and air velocity were measured at five solar tunnel dryer stations. The hot air temperature at the collector output grew from 34°C to 65.5°C for an 8-hour operation in the no-load condition when the solar radiation was changed between 540 and 820 W/m2. At 9:00 a.m., the average maximum temperature was 30°C. During the loading operation, the temperature was 77°C at 1:00 p.m. The moisture content of sliced ginger was reduced from 90.4 to 11.8% on a wet basis using the solar tunnel dryer. With a solar collector area of 6 m2, open sun drying takes 40 hours to achieve the same wet basis condition. A total of eight experiments were carried out, both with and without loads. The dry air temperature at the collector outlet ranged from 34.0 to 65.5 °C. As the drying efficiency, collector area, and time savings improve, the drying time decreases. The ginger is kept in a controlled area, resulting in high-quality dried ginger. The solar tunnel dryer showed a net saving in drying time of 40% over open sun drying.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fabrication and Performance Evaluation of Solar Tunnel Dryer for Ginger Drying

Tesfaye

Habtu

2022

International Journal of Photoenergy

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“…Within two days, the moisture content decreased from 62.87% to 10.62%. The performance of the solar dryer was evaluated under both no load and full load conditions [16]. Extensive literature surveys highlight the necessity and ample room for developing new designs to enhance the drying process across various fields, particularly in the context of drying food products.…”

Section: Introductionmentioning

confidence: 99%

Experimental Performance Analysis Of Free And Forced Fully Developed Air Flow Green House Solar Dryer Using Curry Leaves

Kumar M,

et al. 2023

E3S Web Conf.

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The world is beginning to move away from its consumption of fossil fuels. Various technologies are being developed to make use of renewable energy sources such as wind, solar, and tidal, etc. Solar energy is the best choice among these sources because of it is readily available, abundant, and capable of producing both electric energy and space heating. Solar energy can be used directly or indirectly to dry agricultural and non-agricultural products to preserve them for long a period without formation of fungi. Drying of herbal leaves is an important process in Siddha and Ayurvedic industries to produce herbal medicines in power form. However, as herbal leaves are dried in the open sun, they are susceptible to environmental factors such as rain, insects, and livestock. These disadvantages of open-air drying shall be overwhelmed by greenhouse solar dryer. Greenhouse solar dryer with natural convection, forced convection with hot air supply are the existing methods, but when supplied with hot air, the rise in temperature leads to nutrient loss in herbal leaves. In order to avoid this loss in nutrients, the current work gives a solution that the temperature of forced convection greenhouse dryer can be reduced and controlled by supplying the ambient air at inlet flow in a fully developed air region, and this method can also leads to reduction in colour loss with possibly same or higher drying rate compare to natural convection greenhouse dryer.

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