Investigation of heat transfer phenomenon in green peas at fluid bed draying and tray drying

In this paper, the heat transfer was studied in case of spherical material. Green peas were dried in a heat pump operated tray- and fluid bed dryer. The weight loss and the water content of the product were tested during each measuring set on different temperature levels. The physical properties of the samples were measured in the interest of determination of heat transfer data. The calculation of heat transfer on the basis of measured data was shown a difference from the results of heat transfer data - including dimensionless equations - derived from literature