Design and construction of a solar energy amplifier for solar dryer

Solar energy is radiation from the Sun that is capable of producing heat and generating electricity. The thermal section is applicable for drying of agricultural productions. As the absorption of radiation energy is changing regarding to season, geographical location, daytime, etc., amplifying the radiation energy could be helpful to have higher and more stable condition for using this renewable energy. A system was designed, constructed and tested to amplify the absorption of solar energy by using a room similar to greenhouse, which is isolated and filled by a gas. The system consists of three sections, all covered by glass and a closed circulated cupper pipeline passes through the sections. The solar radiation absorbs, amplifies and heats the air inside the pipeline in the first section, which is filled by a gas. In the second the heated air insides the pipeline heats the air inside the second room and the heated air blows to the third room, as the drying chamber to dry the product which is located in this section. Three gases of ambient air, CO۲ and N۲O were used to fill the first room and their effects were tested during the day from ۶ to ۱۸.

Keywords:

amlifing system , drying , greenhouse effect , solar energy