Thermal Conductivity

752 WordsFeb 26, 20094 Pages
SUMMARY Heat is normally conducted by atoms literally bumping into each other and in metals electrons also add to this flow of heat, which is why metals tend to be good conductors of heat. The measure of how good a material is at conducting heat is known as its thermal conductivity. Thermal conductivity is defined as the rate at which heat flows through a certain area of a Object of the experiment is to determine the thermal conductivity of metals and insulation body.materials and also to demonstrate that heat flow is directly proportional to temperature differences between faces and to cross sectional area. Thermal conductivity is defined as: k = (Q/A) /…show more content…
By the help of spring values which are mounted on the pipes, we regulated the water flow rate to provide a small but regular overflow. By the means of thermometers placed at the water inlet and outlet points, we measure the water temperature. Each thermocouple was selected by the knob which is mounted in the front of the apparatus, and the temperatures at the different points of metal specimen were measured by using potentiometer. We recorded some readings, we measure flow rates for three times and four point temperatures for definite time intervals. When the recorded datas were become stable, we took these values for calculating thermal conductivity. In experiment 1 we placed only aluminum specimen and determined the thermal conductivity of aluminum. In experiment 2 we placed aluminum and stainless steel specimens for determined the thermal conductivity of stainless steel. In experiment 3 we add an insulation material between aluminum and stainless steel specimens to determine the thermal conductivity of insulation
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