Development of a solar tunnel dryer for plantation crops

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dc.contributor.authorMadhavan, K.
dc.contributor.authorBosco, S.J.D.
dc.date.accessioned2014-06-07T10:23:44Z
dc.date.available2014-06-07T10:23:44Z
dc.date.issued2004-12
dc.description.abstractFresh coconut kernel containing 45 to 55% moisture content (M.C.) has to be dried to 5 to 6% moisture level in order to obtain good quality copra. The common practice of getting copra is by sun drying the fresh coconut kernel on cement floor or on sand floor for seven to nine days. Unlike other crops, while drying. the endosperm of coconut is exposed to dirt. Prolonged drying also results in microbial infection. Drying using solar dryers and indirect dryers produce good quality copra in a shorter time. So a solar tunnel dryer of a semi cylindrical shape with a capacity of 1500 coconuts I batch or 200 kg of pepper was developed. The temperature inside the dryer was 20-25" C higher than the ambient and the R.H. value was 20 - 2 2 8 lower than the ambient. Since the drying was done continuously much above the ambient air temperature and at lower R.H. level, the copra was 3 - 4 times less infested by fungi and bacteria than that produced by open sun drying. Drying time for copra was 32 sunshine hours. The cost of the dryer is Rs 136501 and the cost of drying one kg of copra is Rs. 1.15 and for pepper Rs.1. The dryer can also be used to dry other plantation crop / produces.en_US
dc.identifier.citationJournal of Plantation Crops 32(Suppl.) December 2004: 428-432en_US
dc.identifier.urihttp://hdl.handle.net/123456789/2555
dc.language.isoenen_US
dc.subjectsolar tunnel dryeren_US
dc.subjectplantation cropsen_US
dc.titleDevelopment of a solar tunnel dryer for plantation cropsen_US
dc.typeArticleen_US

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