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Experience of Solar Drying in Africa: Presentation of Designs, Operations, and Models
Food Engineering Reviews ( IF 5.3 ) Pub Date : 2018-08-29 , DOI: 10.1007/s12393-018-9181-2
M. C. Ndukwu , L. Bennamoun , F. I. Abam

Africa has a very high solar insolation and a large agrarian sector with a lot of drying of agricultural products carried out with mostly open sun drying. However, efforts have been made by researchers based in Africa working, under changing climatic conditions, to develop solar drying systems, using materials that are locally available. The challenge was that the solar dryers should be used to dry different kinds of products including fish, medicinal plants, fruits, wood, and vegetables and bring the studied material to low moisture content. Most of this research has been obscured since Africa is not at the forefront of solar research, coupled with technological and economic laid-backness. The solar dryers’ designs consist of direct, indirect natural or forced convection dryers or even mixed mode. These collectors are mostly tilted southwards at an angle of inclination ranging from 0° to 60° to the horizontal. Design has focused on the utilization of available local materials with some dryers that can be equipped with supplementary heating source or a storage of energy. Solar drying research among the African countries is very low generally and requires investment to boast it. Therefore, this review highlights solar dryers evaluated within the African region, including the quality of the final product, their efficiency, and prediction of its behavior using simulation and mathematical modeling. Pointing the area of future research and development is also emphasized.



中文翻译:

非洲太阳能干燥的经验:设计,操作和模型的演示

非洲的日照率很高,农业部门很大,许多农产品的干燥工作都是在露天进行的。但是,非洲的研究人员已经做出了努力,在变化的气候条件下,使用当地可用的材料开发太阳能干燥系统。面临的挑战是,应使用太阳能干燥机来干燥包括鱼,药用植物,水果,木材和蔬菜在内的各种产品,并使所研究的材料的水分含量低。由于非洲不在太阳能研究的最前沿,再加上技术和经济的落后,这些研究大部分被掩盖了。太阳能干燥器的设计包括直接,间接自然或强制对流干燥器,甚至混合模式。这些收集器大多以相对于水平面0°至60°的倾斜角度向南倾斜。设计的重点是利用一些干燥机,这些干燥机可以配备辅助热源或蓄能,以利用当地可用的材料。非洲国家中的太阳能干燥研究通常非常低,需要投入大量资金来夸耀它。因此,本篇评论重点介绍了在非洲地区进行评估的太阳能干燥机,包括最终产品的质量,效率以及使用模拟和数学建模对其行为的预测。还强调指出未来的研究和开发领域。设计的重点是利用一些干燥机,这些干燥机可以配备辅助热源或储能,以利用当地可用的材料。非洲国家中的太阳能干燥研究通常非常低,需要投入大量资金来夸耀它。因此,本篇评论重点介绍了在非洲地区进行评估的太阳能干燥机,包括最终产品的质量,效率以及使用模拟和数学建模对其行为的预测。还强调指出未来的研究和开发领域。设计的重点是利用一些干燥机,这些干燥机可以配备辅助热源或蓄能,以利用当地可用的材料。非洲国家中的太阳能干燥研究通常非常低,需要投入大量资金来夸耀它。因此,本篇评论重点介绍了在非洲地区进行评估的太阳能干燥机,包括最终产品的质量,效率以及使用模拟和数学建模对其行为的预测。还强调指出未来的研究和开发领域。它们的效率,以及使用模拟和数学建模来预测其行为。还强调指出未来的研究和发展领域。它们的效率,以及使用模拟和数学建模来预测其行为。还强调指出未来的研究和开发领域。

更新日期:2018-08-29
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