flender netphen H3HH-11-C Helical gear unit H3

Flender/Flender Gear Units/Helical gear unit H3

dphysical characteristics is typical for cereal grains as well as vegetables, fruits, and meatproducts. Moreover, given grain product may have different thermal properties, de- pending on its origin, concentration, and previous history. The property values also vary with moisture content and temperature during drying. Although early analyses used con-stant uniform values of thermal properties, present-day numeric methods, such as nite-element analysis, can account for nonuniform thermal properties (Sweat, . Hence,it is important to know the thermal property changes during drying or storage. Most studieshave reported thermal properties of cereal grains as function of moisture content. Somestudies have evaluated the inuence of temperature on thermal properties of grains (Dutta et al., 1b; Shepherd and Bhardwaj, 1b). Apart from using thermal property data for simulating drying and storage conditions, the data are also useful in the modeling ofheat treatment to wheat, corn, and legumes, as it has shown some promise in stimulatinggermination (Mohsenin, . 3.1 Specic Heat Specic heat indicates amount of heat required to change the temperature of material of unit mass by 1 . In mathematical form, specic heat , is written as Cp/H1Q mT( 2 Sablani and Ramaswamy where Qis the amount of heat, mis the mass of material, and Tis the change in temperature. In the literature, many methods have been reported for the determination ofspecic heats of variety of food products. In most published studies, method of mix-tures, also known as calorimetric method, was employed to determine specic heat. In thismethod, material (usually water) of known specic heat p1, mass m1, and temperature T1 is allowed to exchange the heat in an adiabatic environment with another material for which the specic heat ( Cp is to be determined, and its mass ( m and temperature ( T2; generally, lower or higher than T are also known. Once mixture reaches the equilibrium temperature of Te, the sp