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Medicinal Herb Drying Using A Photovoltaic Array And A Solar Thermal System

机译：利用光伏阵列和太阳能热系统干燥草药

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摘要

Drying of medicinal herbs should take place as soon as possible after harvesting; otherwise insects and fungi, which thrive in most conditions, render them unusable. Conventional drying methods such as open sun drying and conventional-fuel dryers are not suitable; since they may yield a less quality product and/or may increase the drying cost and/or time. Moreover, they may not be reliable and environmentally safe. Therefore, the trend is toward using controlled-nonconventional drying methods, to improve the quality of the product to be dried and at the same time to decrease the drying cost and time. These methods use renewable energy sources for their operation, which are highly recommendable. This work proposes and develops a new controlled drying method; which uses a solar collector and a bio-gas fuel to heat the drying air, and a stand-alone photovoltaic (PV) system to feed the electrical load of the dryer. The designed control technique ensures correct and continuous operation of the dryer's subsystems. Also, this work presents the dynamic modeling for the different components in the solar thermal system, which is responsible for heating the drying air. The results indicate the high effectiveness of the drying method.
机译：收割后应尽快干燥药材。否则，昆虫和真菌会在大多数情况下繁衍，使它们无法使用。常规的干燥方法（如露天晒干法和常规燃料干燥器）不适用；因为它们可能会产生质量较差的产品和/或可能增加干燥成本和/或时间。而且，它们可能不可靠且对环境安全。因此，趋势是使用受控非常规干燥方法，以提高待干燥产品的质量，同时降低干燥成本和时间。这些方法将可再生能源用于其操作，这是高度推荐的。这项工作提出并开发了一种新的受控干燥方法。该系统使用太阳能收集器和沼气燃料加热干燥空气，并使用独立的光伏（PV）系统为干燥机提供电力。设计的控制技术可确保烘干机子系统正确连续地运行。此外，这项工作还为太阳能热系统中的不同组件提供了动态建模，该模型负责加热干燥空气。结果表明该干燥方法是高效的。

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