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首页> 外文期刊>Renewable & Sustainable Energy Reviews >Reviewing the experience of solar drying in Algeria with presentation of the different design aspects of solar dryers
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Reviewing the experience of solar drying in Algeria with presentation of the different design aspects of solar dryers

机译：介绍太阳能干燥机的不同设计方面，回顾阿尔及利亚的太阳能干燥经验

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Solar drying is one of the processes that have found application in Algeria, because of the important quantities of solar irradiations that can be exploited in this country. Nevertheless, the experience of Algeria in solar drying is recent and limited to drying of fruits, vegetables, medicinal and aromatic herbs. The effectuated review has given an idea about the existing functional dryers in this country with presentation of their different design aspects and in some cases the mathematical modeling for well describing and predicting their behaviours. The solar dryers were classified into two classes according to their operation mode and without taking into account if the dryers are using auxiliary sources of energy. The two classes are: passive dryers and active dryers. On the other hand, each class was divided into subclasses representing the type. We have found the direct and indirect types for the passive dryers, but only indirect types for the active dryers. Mixed types were not developed. The solar dryers were developed and tested in two different climatic regions which are the north of the country and the Sahara. In the most studied cases, one or multiple auxiliary sources of energy were used in order to increase the performances of the dryer or to decrease drying time. Consequently, we register the utilization of pebbles as a heat storage system, resistances as electrical heater, gas-ring and photovoltaic cells in order to give independency against the use of the traditional electrical energy. In the case of the active dryers, adding fans and temperature and flow controllers has permitted the control of the drying conditions. Depending on the dryers, the dried quantities vary from 200 g to 36 kg. Comparison between many studied cases for different modes and types and with open sun drying method was furthermore done. With a few exceptions to some solar dryers which present problems of complexity and was not practical and easy for manipulation to the agricultural producer, the majority of the developed solar dryers have presented satisfactory results.
机译：由于该国可以利用大量的太阳辐射，因此太阳干燥是已在阿尔及利亚应用的一种方法。然而，阿尔及利亚在太阳能干燥方面的经验是最近的，并且仅限于水果，蔬菜，药用和芳香草药的干燥。进行的审查给出了关于该国现有功能干燥机的想法，并介绍了它们的不同设计方面，在某些情况下还提供了数学模型，以很好地描述和预测其性能。太阳能干衣机根据其运行模式分为两类，而没有考虑干衣机是否使用辅助能源。这两个类别是：被动干燥机和主动干燥机。另一方面，每个类又分为代表该类型的子类。我们发现被动干燥机的直接和间接类型，但仅发现主动干燥机的间接类型。没有开发混合类型。太阳能干燥机是在该国北部和撒哈拉以南两个不同的气候区域开发和测试的。在研究最多的情况下，使用一种或多种辅助能源以提高干燥机的性能或减少干燥时间。因此，我们将卵石用作储热系统，将电阻用作电加热器，气环和光伏电池，以便独立于传统电能的使用。对于主动式干燥机，增加风扇以及温度和流量控制器可以控制干燥条件。取决于干燥机，干燥量从200克到36公斤不等。此外，还对许多不同模式和类型的研究案例进行了比较，并采用了开放式阳光干燥法。除了一些太阳能干燥器存在一些复杂性，对农业生产者不实用且不易操作的问题以外，大多数已开发的太阳能干燥器均取得了令人满意的结果。

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