An Indirect Passive Solar Dryer for Drying

Alonge, Akindele Folarin; Oniya, O. O.

doi:10.4028/www.scientific.net/amr.367.517

Cited by 8 publications

(9 citation statements)

References 2 publications

(2 reference statements)

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“…The following criteria were considered in the design of the solar dryer (Basunia and Abe, 2001; Alonge and Oniya, 2011): (i) quantity of product to be dried -1 kg of cassava chips per batch; (ii) initial moisture content of product -70% (wb);(iii) final moisture content of product -12% (wb); (iv) average temperature and relative humidity of Ilorin -27 o C and 70% respectively; and (v) useful sunshine hour in Ilorin -9.00h to 17.00h Nigeria time (Alonge and Hameed, 2007;Alonge and Oniya, 2011, A5); (vi) the actuator jack to be regulated by a timer in such a way that it will move at an interval of 1 hour; and (vii) power required to activate the actuator jack and sensor.…”

Section: Design Considerationsmentioning

confidence: 99%

Design, Construction and Preliminary Testing of an Automated Solar Dryer for Cassava Chips

Alonge¹,

Olaniyan²,

Oje³

et al. 2020

JEAE

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An automated solar dryer was designed, constructed and tested under no-load condition and load condition. The components of the dryer include an electromagnetic actuator jack, electronic positional controller, magnetic compass, solar collector and drying cabinet. The actuator jack is designed in such a way that the collector angle varies automatically as the sun rises and sets. In this manner, the drying products get maximum heat energy from the sun rays at any given time. This technology enables the product to be left inside the dryer without any need for manual turning of the collector along the direction of the sun rays. In operation, the actuator jack receives a signal from the electronic positional controller and the resulting inward and outward movement of the jack leads to an angular displacement of 15o for every hour of drying. The result of no load test showed that the average air temperature inside the dryer was 66 o C given a rise of 22 o C over the ambient condition in Ilorin (42 o C) at the time of testing. 1kg of cassava chips was dried to a moisture content of 11.1% (wb) in 9 hours showing that the dryer has performed satisfactorily and is recommended for cassava chips drying.

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Section: Design Considerationsmentioning

confidence: 99%

Design, Construction and Preliminary Testing of an Automated Solar Dryer for Cassava Chips

Alonge¹,

Olaniyan²,

Oje³

et al. 2020

JEAE

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show abstract

“…The amount of water to be removed from crops r m ( kg ) can be calculated as [20][21] ( ) Where, is the initial mass of wet sample; while and are the initial fraction and final fraction of moisture contents. The moisture content on wet basis ( ) and on dry basis ( ) are given by [22][23]:…”

Section: Theoretical Framework 21 Useful Energy Required For Drying mentioning

confidence: 99%

Energetic Performance Analysis of Drying Agricultural Products Integrated With Solar Tracking

et al. 2016

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Renewable energy sources such as solar energy for drying purposes in a more effective and efficient way is inevitable for preservation of agricultural products in developing nations with inadequate access to electricity. This study investigates the effects of using a solar tracking device on the energy performance of drying processes. Three categories of drying conditions were carried out simultaneously; for a fixed solar box dryer, a solar box dryer aided by a tracking device, and open air drying over an effective total drying time of 6 hours each day, for 5 days.

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“…A solar drying system based on the principles of convective heat flow, with use of local materials for yam chip was designed by Alonge et. al [6]. It was observed that the drying time was reduced from 52 hours for sun drying to 45 hours for solar drying of yam chip.…”

Section: Introductionmentioning

confidence: 98%

Effect of air inlet duct features and grater thickness on cooking banana drying characteristics using active indirect mode solar dryer

2019

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The effect of air inlet duct area of an active indirect mode solar dryer on drying of cooking banana was studied. The factors considered for the experiment were: air inlet duct area and grater size of the product. The factors were considered at five different levels using the Central Rotatable Composite Design. The air inlet shapes considered were: square, rectangular, circular and triangular, while the product sizes were 4, 8, 12, 16 and 20 mm respectively. The experimental design gave a total of 52 runs for each experiment. The experiment was replicated three times with sun drying of the product as control. Data were obtained on a two hourly interval between 8:00 am to 6:00 pm on each drying day. Drying was achieved between 9 to 26 hours of drying, as compared to the control, which was between 15 to 37 hours depending on the grater size. The dryers were able to conserve between 26.67 to 37.84 % of the drying time for the products. The air inlet duct area had significant effect on the drying rate of the product at 5% level of significance.

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An Indirect Passive Solar Dryer for Drying

Cited by 8 publications

References 2 publications

Design, Construction and Preliminary Testing of an Automated Solar Dryer for Cassava Chips

Design, Construction and Preliminary Testing of an Automated Solar Dryer for Cassava Chips

Energetic Performance Analysis of Drying Agricultural Products Integrated With Solar Tracking

Effect of air inlet duct features and grater thickness on cooking banana drying characteristics using active indirect mode solar dryer

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