文章基本信息

标题：An Experimental Study of Vegetable Solar Drying Systems with and without Auxiliary Heat
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作者：Abdul Jabbar N. Khalifa ; Amer M. Al-Dabagh ; W. M. Al-Mehemdi 等
期刊名称：ISRN Renewable Energy
印刷版ISSN：2090-7451
电子版ISSN：2090-746X
出版年度：2012
卷号：2012
DOI：10.5402/2012/789324
出版社：Hindawi Publishing Corporation
摘要：An experimental study is conducted to investigate the performance of a solely solar drying system and a system equipped with an auxiliary heater as a supplement to the solar heat. The performances of both are compared to that of natural drying. Beans and peas are dehydrated in a system that consists of two flat plate collectors, a blower, and a drying chamber. Tests with four different airflow rates, namely, 0.0383, 0.05104, 0.0638, and 0.07655 m3/s are conducted. It was found that the drying time was reduced from 56 hours for natural drying to 12–14 hours for solar drying and to 8-9 hours for mixed (solar and auxiliary) drying. The efficiency of the mixed drying system was found to increase by 25% to 40% compared to the solely solar drying. A best fit to the experimental data of peas and beans was obtained by six exponential equations for the various systems with a correlation coefficient in the range 0.933 and 0.997.