This study presents performance of the solar tunnel dryer for drying of peach samples. The solar tunnel dryer consists of a flat plate solar collector, a drying tunnel, a solar cell module and a small axial fan. It has been constructed at the Department of Agricultural Machinery and Technologies Engineering at Isparta University of Applied Sciences. During the drying process, solar irradiation, drying air temperature, relative humidity, and air velocity were measured constantly in different parts of the dryer. At same time, mass loss of the peach samples was measured during the drying period at one-hour interval. In this study, the color measurements fresh and dried products were determined at the beginning and end of experiment. The fresh peach samples were sorted, graded, washed by tap water and then sliced manually as half-moon without peeling before pretreatment. Sun drying behavior of sliced peach samples pretreated with 1% sodium metabisulfit, 1% ascorbic acid and non-pretreated was investigated. The drying characteristic curves were evaluated against ten mathematical models. Results showed that the Midilli et al. model was found to be the best descriptive model for solar tunnel drying of thin layer peach.

这项研究介绍了太阳能隧道干燥机干燥桃样品的性能。太阳能隧道干燥机由平板太阳能收集器，干燥隧道，太阳能电池模块和小型轴流风扇组成。它是由Isparta应用科学大学的农业机械和技术工程系建造的。在干燥过程中，不断测量干燥器不同部位的太阳辐射，干燥空气温度，相对湿度和空气速度。同时，在干燥期间以一小时的间隔测量桃样品的质量损失。在这项研究中，新鲜和干燥产品的颜色测量是在实验开始和结束时确定的。将新鲜的桃子样品分类，分级，用自来水洗净，然后在半月前手动切片，不剥皮，然后进行预处理。研究了用1％偏亚硫酸氢钠，1％抗坏血酸和未预处理的桃片样品的日晒行为。针对十个数学模型评估干燥特性曲线。结果表明，米迪利等。发现该模型是薄层桃子太阳隧道干燥的最佳描述模型。