Abstract
In this study, working parameters of the system consisting of air heaters and dryer with solar energy of 0.20 m2 with a space of 0.72 m2 and 10 pieces in the cabin were investigated experimentally. Average atmospheric air temperature and relative humidity values during the dry daylight hours were measured at 49°C and 35%, respectively. As a result of the examination of the test results, the atmospheric air temperature of 56°C was reached in the dryer depending on the solar radiation and environmental conditions. In addition, the accuracy of solar radiation data in the design of solar energy systems was extremely important. Six different models and MBE, RMSE and t-stat comparison methods were used to calculate the amount of global solar radiation on the horizontal surface. The best results were given by Model-3 with values of MBE=0.130 and RMSE=1.401, while the best result from t-statistics was with t-ist=0.282 with Model-5. When the equations are evaluated statistically, it has been shown that the solar-powered family type shelf dryer and tomato drying conditions can be used for Aksaray province. Key words: Solar energy, shelf dryer, tomato, solar radiation, relative humidity.
Highlights
Drying, which is one of the methods applied for long-term storage of agricultural products, is the oldest method and the largest application area (Yagcioglu, 1996)
Six different models and Mean Bias Error (MBE), Root Mean Square Error (RMSE) and t-stat comparison methods were used to calculate the amount of global solar radiation on the horizontal surface
The best results were given by Model-3 with values of MBE=0.130 and RMSE=1.401, while the best result from t-statistics was with tist=0.282 with Model-5
Summary
Drying, which is one of the methods applied for long-term storage of agricultural products, is the oldest method and the largest application area (Yagcioglu, 1996). The purpose of the drying process is to stop the development of biochemical reactions and microorganisms that may occur in the products by removing free water in wet products and reducing the amount of food that can not be bred so that the foodstuffs can last for a long time without deterioration. Dried tomato production in Turkey began in small areas in the early 1980s. Most of the tomatoes are dried by spreading on the ground in Turkey (Condori et al, 2001). Drying companies usually process red, spotless, and medium sized tomatoes, which they have collected, through washing, sorting, boiling, cutting, sulphurizing and salting. They are dried in the sun for drying
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