Conducción Convección Radiación, Ejercicios de Transmisión de Calor

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bobos a a da da as as dd mn AO 9 y - 15 Ie Conduction 1,1, Determine the hes X ivi 2 ci so heat Mux across a 0,05-methick iron plate [with thermal conductivity al is the he )J ifone oits surfaces is maintained at 60 %C and the other at 100 *C. What 5 the heat flow rate across the plate over a surface area of 2 m2? 2. A tel AM e dde wi 1,2, A temperature difference of 100 *C is applied across a cork board 5 em thick with pee conductivity of 0,04 W/(m + %C), Determine the heat flow rate across A 3-m' arca per hour, 1,3,Two large plates, one at $0 9C and the other at 2000 *C, are 12 em apart. If the space between them is filled with loosely packed rock woo! of thermal conductivity 0.08 W/(m + *C). calculate the heat flux across the plates. 1.4.The hot surface of a 5-cm-thick insulating material of thermal conductivity 0.1 W/m + cc) is maintained at 200 *C. If the heat flux across the material is 120 W/m? what is the temperature of the cold surface? 1.5. The heat flow through a 4-cm-thick insulation layer for a temperature difference of 2000C across the surfaces is 500 W/m?. What is the thermal conductivity of the insulating material? 1.6. A brick wall 30 cm thick with thermal conductivity 0.5 W/(m + *C) is maintained at 500 *C at one surface and 20%C at the other surface. Determine the heat flow rate across a 1- m? surface area of the wall. 1.7. A window glass 0.5 cm thick with thermal conductivity 0.8 W/(m » *C) is maintained at 300C at one surface and 200 *C at the other surface. Determine the heat flow rate across a 1-m? surface area of the glass. 1.8!The heat flow through a 4-cm-thick 1 cork board fora temperature difference of 100 *C across the surfaces is 0.1 kKW/m?. What is the thermal cacao of the cork board? » Ex ” he heat flux through a 10-cm-thick layer of loosely packed róck wool fora temperature difference of 1000C ¡is 75 W/m?. What is the thermal conductivity of the packed rock wool? Convection 1.10, Water at 20 *C flows over a flat plate at 80 C ient i 4 1 , transfer coefficient is 200 W/(m? + “C), determine the heat flow per square di ni plate (heat flux). er oftl at ho lá gg II Escaneado con CamScanner