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4 lis 2012 · Thermal conductivity coefficients for insulation materials, aluminum, asphalt, brass, copper, steel, gases and more. Water Content in Food and other Products.
Three important thermal properties of foods are specific heat, thermal conductivity and thermal diffusivity. Specific heat is the amount of heat needed to raise the temperature of 1 kg of a material by 1 °C.
Thermal conductivity is defined as the ability of a material to conduct heat. Thermal conductivity of foods depends on temperature, composition, and porosity of material. There are steady-state and transient-state methods for measurement of thermal conductivity.
1. Introduction. 1.1. Food Properties during Freezing. 1.2. Water Content. 2. Experimental Data and Prediction Models. 3. Density. 3.1. Definition and Units. 3.2. Porosity. 3.3. Density Measurement. 3.4. Bulk Density of Selected Foods. 3.5. Theoretical Density Models. 4. Specific Heat. 4.1. Definition and Units. 4.2. Measurement Methods. 4.3.
4 lis 2012 · Online calculator, figures and tables showing thermal conductivity of liquid and gaseous ammonia at temperatures ranging -70 to 425 °C (-100 to 800 °F) at atmospheric and higher pressure - Imperial and SI Units.
The experimental data on density, thermal conductivity, heat capacity, and viscos-ity of the five vegetable oils are presented, respectively, in Tables 2–5, at the different temperatures evaluated. Oil viscosity decreases both in function of the degree of unsatu-ration and temperature.
21 sie 2009 · Theory of thermal conductivity measurement by a hot wire probe. The hot wire probe method has been used to measure thermal conductivity of biological materials, insulations, rocks, ceramics, foods, soils, and glass over a wide range of temperatures and other environmental conditions.
