TEMPERATURE AND RELATIVE HUMIDITY GAINS OF “TEKO BERSAYAP” MODEL SOLAR DRYER (A RESEARCH NOTE)

Yuwana, Yuwana and Bosman, Sidebang and Evanila, Silvia (2011) TEMPERATURE AND RELATIVE HUMIDITY GAINS OF “TEKO BERSAYAP” MODEL SOLAR DRYER (A RESEARCH NOTE). In: Proceedings of t e International Seminar , Palembang 2 0 – 22 Ok to b er 2 01 1. Fakultas Pertanian UNSRI, Palembang, pp. 221-227. ISBN 9789799893857

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Abstract

In order to solve the problems a rise from sun drying practices for agricultural products, a solar dryer was con structed having profile a ja r in its lon g se ct ion and two wings appeared in its cro ss section. Whole structure was covered with UV plastic to harve st en e rg y fro m th e sun a nd th e bo d y o f th e ja r wa s d ry in g cha mb e r, tu nn e l o f th e ja r a ct s a s ch i mn e y eq u ip p ed with e xh au st fa n in sid e wh ile th e in clin ed wing s fu n c tio n a s ad d ed he a t co lle c to r. The dryer was equipped with two in lets situated at the bottom end soft he wings. Du ring o p e ra tio n fresh a ir e n t ere d in to th e in le ts a nd wa s h ea ted in sid e th e d ry ing c ha mb e r an d wa s the n ex h au st ed th ro ug h th e ch imn ey . P erfo rma n c e of th e d ry e r wa s e xp erim e n t ed fo r th ree ti me s in th re e d iffe re n t d a y s fro m 0 8 . 00 to 1 7 . 00 o ’ c lo c k . Th e re su l t o f th e ex p e rim e n t in d i ca ted th a t fo r th e a ve ra g es a mbie n t temp era tu re an d re la tiv e h u m id ity ra ng in g fro m 29 to 38 .7 o C a nd 41 .7 to 6 8 % re spe c tiv ely , t h e a v e rag es d ryi ng ch a mb er te mp e ra tu re an d re la ti ve h u m id ity were 3 2 .4 to 51 o C an d 1 8 . 6 to 53 .8 % re sp e ct ive ly . T h e a v e rag e te m p e ra tu re ga in wh ic h wa s th e d iffe ren ce s b e twe e n d ryin g ch a mb e r te m p e ra tu re an d a mb ien t t em p era tu re , a nd th e a v e rag e re la t ive h u m id ity ga in wh ich wa s d if fe re n c e b e twee n d ry ing ch a m b er re la t ive h u m id ity an d a m bie n t rel ativ e h u m id i ty were 1 0 o C an d 2 1. 4 % re sp e ct ive ly .

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