利用太阳能干燥机缩短干燥时间,将漂白葡萄转化为无化学物质葡萄干的实验研究

Nitin Sharma, Namrata Sengar
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引用次数: 0

摘要

太阳能干燥机是太阳能热装置,它可以提高干燥温度,并有助于从负载中去除水分,与开放式太阳干燥相比,可以更快地干燥农产品。通过太阳能干燥机可以有效地实现葡萄到葡萄干的转化,并且正在努力提高效率并进一步缩短干燥时间。通常为了减少葡萄转化为葡萄干的干燥时间,采用了几种使用化学品的预处理方法。本文采用葡萄焯水的方式进行预处理,不使用任何化学物质,研究对太阳能干燥机干燥时间的影响。并将实验结果与同一太阳能干燥机在不焯水的情况下将葡萄转化为葡萄干的研究进行了比较。研究发现,以焯水的形式进行的预处理使干燥时间减少了近一半。以图的形式给出了与环境温度、干燥机内空气温度、基片温度和太阳辐射有关的温度分布研究的实验观测结果,并进行了干燥速率和效率估计的计算。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental study on conversion of blanched grapes to raisins without chemicals through solar dryer to reduce drying time
Solar dryers are solar thermal devices which increase the drying temperature and aid in moisture removal from the load, leading to faster drying of the agri-product as compared to the open sun drying. Conversion of grapes to raisins can be effectively achieved through solar dryers, and efforts are ongoing to improve the efficiency and further reduce the drying time. Usually in order to reduce the drying time for the conversion of grapes to raisins several pre-treatment methods with the use of chemicals are employed. In the present work pre-treatment in the form of blanching of grapes is adopted without the use of any chemicals to study the effect on the drying time in the solar dryer. The experimental results have been compared with the study of conversion of grapes to raisins with the same solar dryer without blanching. It is found that pre-treatment in the form of blanching resulted in a reduction in drying time to almost half. Experimental observations for the temperature profile studies relating to ambient temperature, air temperature inside the dryer, base plate temperature and solar radiation are presented in the form of graphs and calculations have been carried out for the estimation of drying rate and efficiency.
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