Design, Construction And Testing Of A Moringa Oliefera MixedMode Cabinet Solar Dryer
Journal Title: American journal of Engineering Research - Year 2018, Vol 7, Issue 7
Abstract
Different drying techniques for drying agricultural products were reviewed in this study with an objective of developing a suitable solar dryer for drying Moringa Oliefera leaves. An experimental Moringa Oliefera Mixed-mode cabinet solar dryer was designed, constructed and tested. The dryer which has a drying cabinet area of 1.46m2 and a collector area of 1.10m2 was used to dry 5.0±0.01kg of moringa leaves. Maximum temperature of 40.0±1.0℃ was recorded inside the drying cabinet throughout the test period to comply with medicinal considerations. The time taken by the solar dryer to reduce the moisture content of Moringa from 73.2% to 9.0% is 20 hours as compared to 96 hours (4 days) in open-air or natural sun drying. In addition, the effectiveness of the dryer was further confirmed by other tests which indicated that more moisture was removed by this design than the other method of drying as much liquid was removed from the Moringa leaves leaving the final mass of initial 5kg to be 0.8±0.01𝑘𝑔 – compare with that of the conventional method where the final mass was 1.2kg. These values predicate that products dried by this design will have a longer storage life over others dried with other methods. Obviously, this mixed-mode cabinet solar Moringa dryer has also overcome such other disadvantages of exposing the Moringa to weather elements like dust, rain, wind and overly hot ambient temperatures. The designed dryer also shielded the products from disease carrying vectors like insects, rodents and domestic animals in contrast to the traditional open sun drying methods. This technology has contributed a fast and hygienic method that reduces wastage during solar drying of products to the economy. SIGNIFICANCE: This Design presents a better option of preservation of Moringa Oliefera leaves to farmers all over the world. It furthers help to reduce the traditional drying time and overcome disadvantages such as exposure to dust, rain and wind, insects, birds, rodents and domestic animals while drying, Soiling, contamination with micro-organisms, formation of mycotoxins, and infection with disease-causing germs which results from the traditional open-air method of drying.
Authors and Affiliations
1 emmanuel, O. A. , . , 2Diso, I. S, nwaeju, C. C
Keywords
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