Improving the airflow distribution within an indirect solar dryer by modifications based on computational fluid dynamics

Khaldi Souheyla; Korti Abdel Illah Nabil; Abboudi Saïd

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Improving the airflow distribution within an indirect solar dryer by modifications based on computational fluid dynamics

机译：通过基于计算流体动力学的修改来改善间接太阳能干燥器内的气流分布

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摘要

Successful drying requires a uniform heating of the product along the trays. This condition is a real challenge in the design of solar dryers. Studies show that a conventional solar dryer provides a nonuniform temperature distribution at the trays level. This paper seeks to remedy this problem by adding a second air inlet to the cabinet dryer in order to get a more homogeneous temperature. Unsteady turbulent airflow and heat transfer through a two-dimensional model is carried out for a typical day of August under the climatic conditions of Tlemcen (Algeria). Figs fruit was selected to be dried. The effect of the proposed configuration on the dynamic and thermal behaviors of the solar dryer has been discussed. The results revealed that using two opposite inlets can improve the drying process by reducing the fluctuation of the temperature to about 67% and increasing the mass flow rate by about 18%.

机译：成功的干燥需要沿着托盘均匀加热产品。这种情况是太阳能干燥机设计中的真正挑战。研究表明，传统的太阳能干燥机在托盘级提供的温度分布不均匀。本文试图通过向橱柜干燥机增加第二个进气口来解决这个问题，以获得更均匀的温度。在特莱姆森（阿尔及利亚）的气候条件下，典型的8月中，通过二维模型进行了不稳定的湍流和热传递。选择无花果果实进行干燥。已经讨论了所提出的配置对太阳能干燥机的动态和热行为的影响。结果表明，使用两个相对的入口可通过将温度波动降低到约67％并将质量流率增加约18％来改善干燥过程。

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来源
《International journal of air-conditioning and refrigeration》 |2017年第3期|1750022.1-1750022.13|共13页
作者
Khaldi Souheyla; Korti Abdel Illah Nabil; Abboudi Saïd;
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作者单位

ETAP Laboratory, University of Tlemcen, FT, Department of Mechanics, BP 230, Tlemcen, Algeria,Laboratoir Interdisciplinaire Carnot de Bourgogne (UTBM), CNRS and Univ. Bourgogne Franche Coomté (UBCF), Department EDIM, UTBM Site de Sevenans, Belfort Cedex, France;

ETAP Laboratory, University of Tlemcen, FT, Department of Mechanics, BP 230, Tlemcen, Algeria;

Laboratoir Interdisciplinaire Carnot de Bourgogne (UTBM), CNRS and Univ. Bourgogne Franche Coomté (UBCF), Department EDIM, UTBM Site de Sevenans, Belfort Cedex, France;

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正文语种 eng
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关键词
Cabinet dryer; Free convection; Improving uniformity; Solar dryer;

机译：橱柜烘干机;自由对流;提高均匀度;太阳能烘干机;

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Improving the airflow distribution within an indirect solar dryer by modifications based on computational fluid dynamics

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