ANALYSIS OF THE TEST RESULTS OF AN ADVANCED GREENHOUSE-TYPE SOLAR DRYER

Abstract

The high degree of solar radiation incident on the territory of the countries of Central Asia, especially Uzbekistan and Turkmenistan, makes it possible to maximize the use of solar installations. In this paper, the operating modes of a solar installation such as an advanced greenhouse are studied. The greenhouse type dryer is wrapped in polyethylene. The lower part of the dryer is thermally insulated and is located on a surface measuring 6.5x3m2. To maintain humidity in the dryer, natural convection is used. This process is carried out using 2 changes: - for access of air in addition installed two holes - to exhaust the air, an additional hood was installed with a length of 9 m. The dryer was built in Uzbekistan, the city of Bukhara. It twice dried grapes of 800 kg. The grapes were initially dried for 3 days at a humidity of 82%, then for 5 days in the sun. Thus dried grapes are completely protected from insects, pests, dust and rain. In addition, the dried grapes turned out to be clean and of high quality.