Numerical Analysis of the Dynamic and Thermal Behavior of an Indirect Solar Dryer: Effect of the Outlet

IF 0.8 Q4 THERMODYNAMICS

International Journal of Air-conditioning and Refrigeration Pub Date : 2020-11-25 DOI:10.1142/s2010132521500012

M. Salhi, Dounia Chaatouf, Benyounes Raillani, N. Dihmani, S. Amraqui, M. Moussaoui, A. Mezrhab, J. Fontaine

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引用次数: 7

Abstract

This work is a contribution to the improvement of the thermal and the dynamic fields of a natural convection indirect solar dryer, composed of a solar flat air heater and a drying chamber, intended for drying agricultural products and medicinal plants. We have studied the effects of size and position of the outlet on the distribution of air and temperature within the drying chamber, containing the figs as a product to be dried. To be more realistic, we have used a user defined function (UDF) subroutine written in [Formula: see text] to integrate the unsteady evolution of a day’s climate data in the Oujda region. This study was achieved by numerical simulations using the ANSYS FLUENT software, in order to optimize the distribution of air and temperature inside the drying chamber, and to choose the best outlet’s position and size for the best efficiency of the dryer. The results show that the optimal outlet position found is in the right corner with a size range of 0.07 to 0.15[Formula: see text]m. The effects of the position and size of the outlet on the air deflection along the trays were also presented and discussed.

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间接太阳能干燥机动力和热特性的数值分析:出口的影响

本工作对自然对流间接太阳能干燥机的热场和动力场的改进做出了贡献，该干燥机由太阳能平板空气加热器和干燥室组成，用于干燥农产品和药用植物。我们研究了出口的大小和位置对干燥室内空气和温度分布的影响，其中包含无花果作为待干燥的产品。为了更实际，我们使用了用户定义函数(UDF)子程序来整合Oujda地区一天气候数据的不稳定演变。为了优化干燥室内的空气分布和温度分布，选择最佳的出口位置和尺寸，以达到干燥机的最佳效率，本研究利用ANSYS FLUENT软件进行了数值模拟。结果表明，找到的最佳出口位置为右下角，尺寸范围为0.07 ~ 0.15 m[公式:见文]m。此外，还讨论了出口的位置和尺寸对空气沿塔板偏转的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Air-conditioning and Refrigeration THERMODYNAMICS-

CiteScore

2.70

自引率

10.00%

发文量

期刊介绍： As the only international journal in the field of air-conditioning and refrigeration in Asia, IJACR reports researches on the equipments for controlling indoor environment and cooling/refrigeration. It includes broad range of applications and underlying theories including fluid dynamics, thermodynamics, heat transfer, and nano/bio-related technologies. In addition, it covers future energy technologies, such as fuel cell, wind turbine, solar cell/heat, geothermal energy and etc.