Performance of solar dryer and drying effect for panax notoginseng

被引：0

作者：

Wang Y. ^{[1
]}

Li M. ^{[1
]}

Wang L. ^{[2
]}

Wei S. ^{[1
]}

机构：

[1] Key Lab. of Advanced Technique and Preparation for Renewable Energy Materials, Ministry of Edu., Yunnan Normal University

[2] School of Physics and Electric Information, Yunnan Normal University

来源：

Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | 2010年 / 26卷 / 10期

关键词：

Agricultural products; Drying; Panax notoginseng; Solar dryers;

D O I：

10.3969/j.issn.1002-6819.2010.10.063

中图分类号：

学科分类号：

摘要：

In order to improve the efficiency and quality of panax notoginseng drying, a solar dryer consisting of two identical solar collector, solar drying cabinet, and air blower for panax notoginseng drying were constructed. The air solar collector consists of two air passes having V-groove absorption plates, and a single glass cover. The thermal performance of solar dryer was investigated and experiment with the solar dryer for panax notoginseng was conducted under climate condition of Kunming, Yunnan Province. Drying effect of the equipment was compared with that of traditional nature drying. The results showed that the solar air heating collectors could obtain a good thermal performance in winter season. While the air flow mass was 0.0597 kg/s, the maximum temperature of outlet air and maximum thermal efficiency were 62.2°C and 76.7% respectively. Its average efficiency and temperature was 53.9% and 47.5°C even in cloudy day, respectively. With the mode of air entering from the top, the temperature distribution in drying cabinet was non-uniform, causing great temperature differences in different areas. However, air temperature with this mode rose rapidly and a higher average temperature could be gained than the way air entering from the bottom. With the air deflector, the uniformity of temperature distribution inside cabinet was improved significantly. The experimental comparison between two methods suggested that the solar drying was very effective, and the drying time was shorten to about 450 minutes from 990 minutes of the traditional sun drying. It is observed that the solar dryer could obtain higher quality than traditional drying method.

引用

页码：377 / 383

页数：6

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