| Abstrakt: |
Currently, alternative energy sources are very important for preservation of the environment. In the food industry one of the most common types of storage products is the drying. When using gas and electricity, this process becomes very expensive. We have designed specially driers that work exclusively on solar energy. They used for drying various foods -fruits, vegetables, herbs, berries, mushrooms, etc. For the drying process are used solar thermal air collectors (STAC) which made by us on the basis of our selective absorbent coating. The research of the thermal characteristics of the STAC was carried out on a specially constructed experimental stand. As a result of the tests it was confirmed that the fans of the system can support air supply in the range of 20-120 m3/h. In the summer, at a temperature of 25-350C, the temperature of the flow of air at the outlet from the collector can reach 70-75 °C. For all-time drying there are developed special innovative energy storage batteries at National Technical University of Ukraine "Kyiv Polytechnic Institute". Batteries can be charged from solar panels, have a shorter charging time, the possibility of charge-discharge at low and high temperatures, higher reliability, are safe and durable. At present, for such types of solar dryers we are developing special devices for controlling and regulating the temperature and humidity of drying, which is very important when drying medicinal herbs, cereals, fruits, mushrooms, etc. Indeed, the deviation of a few degrees during the drying of such products can significantly change their consumer characteristics.Our innovative and efficient solar dryers systems provide a very easy installation, with the ability to fit in the garden, on any area or indoors. In this case, a person does not bear any costs and additional charges for maintenance during their operation, as they fully work from the energy of the sun. [ABSTRACT FROM AUTHOR] |
