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PRICE AND QUALITY OF COFFEE (COFFEA ARABICA L.) DRIED USING AIR DEHUMIDIFIED BY CONVECTION REA
Konopatzki,Evandro A.; Christ,Divair; Coelho,Silvia R. M.; Demito,Angélica; Werncke,Ivan; Camicia,Rafaela G. da M..
ABSTRACT Grain drying processes have been improved to reduce costs and losses of coffee beverage quality. The objectives of this study were to evaluate the quality of coffee dried using air partially dehumidified before entering drying units (DUs) in four coffee-producing farms, as well as the effects of such process on coffee commercial value. The method consisted of obtaining three samples (triplicates) of coffee dried in both DUs and concrete terraces (control) for mean multiple comparisons. The following variables were analyzed for sieve #13 and hand-picked beans: defect number, cupping test, and pricing. Evaluations were carried out by three professional graders. The results showed that coffee dried in the DUs presented fewer broken grains, higher...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Air dehumidifier; Artificial drying; Coffee dryers; Electric dryer.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000500649
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Effect of different desiccant bed designs in a desiccant column on their dehumidification performance CIGR Journal
Sawardsuk, Prueksa; Sripinyowanich Jongyingcharoen, Jiraporn; Cheevitsopon, Ekkapong.
A design with multilayers of solid desiccant and air ducts in a desiccant container was developed to allow good air flow in a zigzag pattern. The desiccant material was silica gel stacked as multiple layers in a column with different numbers of layers and with or without air holes on the upper cover of the container that penetrated through all layers. Air dehumidification characteristics and psychrometric properties of air of various desiccant bed designs were investigated. Dehumidification rate, percentage adsorbed water, desiccant column effectiveness of each design were evaluated at an air flow rate of 1.2 m3/min, where the control was a single layer packed bed design. Both kinds of multilayer bed designs (with and without air ducts) exhibited a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Air dehumidifier; Desiccant column; Multilayer desiccant bed; Silica gel.
Ano: 2022 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7155
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