Thermal Efficiency of Indirect Solar Dryer Using Pebbles as Absorber during Cocoa Drying  

作　　者：N’Dri Emmanuel Abouanou Théophile Roch Ori Ekoun Paul Magloire Koffi Prosper Gbaha N’Dri Emmanuel Abouanou;Théophile Roch Ori;Ekoun Paul Magloire Koffi;Prosper Gbaha(Laboratoire de Technologie, Unit de Formation et Recherche Sciences des Structures de la Matire et de Technologie (UFR SSMT), Universit Flix Houphout Boigny, Abidjan, Cte dIvoire;Laboratoire des Procds Industriels, de Synthse, de lEnvironnement et des Energies Nouvelles, Institut National Polytechnique Flix Houphout Boigny, Yamoussoukro, Cte dIvoire)

机构地区：[1]Laboratoire de Technologie, Unit de Formation et Recherche Sciences des Structures de la Matire et de Technologie (UFR SSMT), Universit Flix Houphout Boigny, Abidjan, Cte dIvoire [2]Laboratoire des Procds Industriels, de Synthse, de lEnvironnement et des Energies Nouvelles, Institut National Polytechnique Flix Houphout Boigny, Yamoussoukro, Cte dIvoire

出　　处：《World Journal of Engineering and Technology》2025年第1期96-118,共23页世界工程和技术(英文)

摘　　要：The effect of a storage system on drying time and estimation of drying parameters of cocoa beans using an indirect solar dryer with a sensible heat energy storage system (stones which act as both absorber and heat storage media) is the main subject of this article. This dryer, which uses stones as storage material and is made of wood and plywood, was used to dry a quantity of 5 kg of fermented cocoa beans. The drying parameters for the drying curves and the drying efficiency of cocoa beans were established and studied. The drying curves were modelled from semi-empirical models. The results showed that the moisture of cocoa beans decreased from 60% to 7% in wet basis. With a solar collector and drying efficiency of 40% and 34%, respectively. And this with a maximum average difference temperature between the drying air and the ambient temperature of 13.25˚C day or night. The best concordances are obtained with R2 values of 0.9983, 0.9843, 0.9813 and 0.9837 respectively from the models of Hii, Jena and Das, Demir et al. and Alibas.The effect of a storage system on drying time and estimation of drying parameters of cocoa beans using an indirect solar dryer with a sensible heat energy storage system (stones which act as both absorber and heat storage media) is the main subject of this article. This dryer, which uses stones as storage material and is made of wood and plywood, was used to dry a quantity of 5 kg of fermented cocoa beans. The drying parameters for the drying curves and the drying efficiency of cocoa beans were established and studied. The drying curves were modelled from semi-empirical models. The results showed that the moisture of cocoa beans decreased from 60% to 7% in wet basis. With a solar collector and drying efficiency of 40% and 34%, respectively. And this with a maximum average difference temperature between the drying air and the ambient temperature of 13.25˚C day or night. The best concordances are obtained with R2 values of 0.9983, 0.9843, 0.9813 and 0.9837 respectively from the models of Hii, Jena and Das, Demir et al. and Alibas.

关 键 词：Cocoa Beans Indirect Solar Dryer Heat Storage Drying Curve Solar Energy 

分 类 号：TS6[轻工技术与工程]