The Biogas Solar Energy Research Institute of Zhejiang Province built a monolithic greenhouse-type helmet-type solar dryer with a lighting area of ​​196m2. The activity cover plate is used for heat insulation to reduce the heat loss of the transparent cover of the dryer at night, and the single chip microcomputer is used to monitor the drying process temperature, humidity, and other drying process parameters. The device is combined with small hydropower and can be complementary to each other and operates around the clock. It is mainly used for drying equipment for agricultural and sideline products such as mushrooms and fungus. The helmet type solar dryer combines the solar air collector and the drying chamber together into a whole. The trays containing the materials are arranged in a drying room, and the products are dried evenly and the quality is good. In addition, Guangzhou Energy Institute has built a 500m2 monolithic solar dryer at the Lianxian candy factory in Guangdong Province. It is one of the few large-scale solar drying devices; the material directly absorbs solar radiation and functions as an absorber. As a result, air is heated due to the greenhouse effect. Axial fans were installed in the drying room to allow air to circulate continuously in the two columns of drying chambers. The Guangzhou Institute of Energy Research of the Chinese Academy of Sciences and the Guangzhou Agricultural Machinery Research Institute built a lighting area of ​​187m2 in the rural area of ​​Sanyuanli, a suburb of Guangzhou in 1983. The integrated solar drying production test device. The device is applied to dry processing of Chinese medicinal materials, dried fruits, red dates, lotus seeds and other agricultural and sideline products. The daily average dry amount of the material moisture content from 40% to 15% is 1.5 to 2 tons, and the maximum amount of the material is 5 tons. The solar thermal efficiency of the device is high, with an average daily efficiency of 30 to 40%, and it penetrates the material layer up and down to increase the chance of contact with hot air on the surface of the material: in the integrated solar dryer, radiation heat exchange and convection heat transfer At the same time, the drying process is strengthened. The moisture-absorbed moist air is discharged from the exhaust pipe. By controlling the valve, part of the hot air can also be returned with the fresh air added to the intake port, and the exhaust air can enter the drying chamber again to reduce the exhaust heat loss. The drying efficiency of the system is about 40%, and the drying cycle is 17 to 18 hours (mushrooms). Its distinguishing feature is that it fully absorbs the advantages of common greenhouse dryers, and it also improves the structure of the dryer and the ventilation system. Color Mastbatch Granulation,Cable Raw Materials,Dual-Drive Kneader ,Medium Voltage Granulation JIANGSU XINDA TECH LIMITED , https://www.xindaextruder.com
Talking about the prospect and application of helmet type solar energy dryer
As we all know, in our country has been advocating energy-saving emission reduction technology, so the research of solar dryer has always been a topic of more foreword, because it belongs to new energy, various experiments are also ongoing, solar dryer can be roughly divided For: monolithic and parabolic concentrators, collectors, greenhouses, greenhouse combined and collectors. Here we briefly introduce the cutting-edge technology in the above drying machine: the helmet type solar dryer.