The temperatures on the left and right surfaces of a 15-cm thick wall are 375C and 85C . The wall is constructed of a material with the following properties: k=0.78, p=2700, Cp=0.84. What is the thermal diffusivity of the wall in m^2/s ?
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The temperatures on the left and right surfaces of a 15-cm thick wall are 375C and 85C . The wall is constructed of a material with the following properties: k=0.78, p=2700, Cp=0.84. What is the thermal diffusivity of the wall in m^2/s ?
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- In a glass plant in Cavite, a furnace has fire-brick walls made up of the following two materials in series : Non-corrosive brick as inner layer (material 1) Clay brick as outer layer (material 2) Thickness 4.5 inches 8 inches Thermal conductivity k1 k2 The temperature inside the furnace (inside wall surface of the non-corrosive brick) is found to be 1105 oF while the outside temperature (outside wall surface of clay brick) is 365 oF. This is not the desired temperature inside the furnace so engineers thought of lagging the furnace walls with another material to reduce heat loss. The additional lagging material consists of magnesia layer which is 2 inches thick and has a thermal conductivity of 0.04 Btu /h.ft.oF. During a test run on the furnace with the magnesia lagging material now, new temperature readings were recorded : Point of measurement Temperature reading Inside furnace (inside wall surface of non-corrosive brick 1355 oF Interface between…4. On a winter's day the outside temperature of a 17-in thick concrete wall is -29°F, the wall is 15 ft long and 9 ft high. How many BTUS are required to keep the inside of the wall at 70°F? Assume the thermal conductivity of the wall is 0.8 BTU/h ft°F.a metal bar is made up of 3.0 cm of aluminum and 5.0 cm of steel. the free end of the aluminum bar is placed in contact with steam at 100 degree Celsius. at the other side, the free end of the steel bar maintained at 0 degree Celsius by placing it in contact with the ice. find the temperature at the point that connect the aluminum and the steal (junction)