A furnace wall consisting of three layers, first layer of insulation brick of 10 cm thickness of conductivity 0.24 W/mK. The face is exposed to gases at 950°C with a convection coefficient of 95 W/m2K. This layer is backed by a 15 cm layer of firebrick of conductivity 0.6 W/mK. The third layer is the plate backing of 10 mm thickness of conductivity 49 W/mK.. The plate is exposed to air at 30°C with a convection coefficient of 15 W/m?K. Determine the heat flow, the surface temperatures and the overall heat transfer coefficient. Also draw the equivalent circuit diagram.

A furnace wall consisting of three layers, first layer of insulation brick of 10 cm thickness of conductivity 0.24 W/mK. The face is exposed to gases at 950°C with a convection coefficient of 95 W/m2K. This layer is backed by a 15 cm layer of firebrick of conductivity 0.6 W/mK. The third layer is the plate backing of 10 mm thickness of conductivity 49 W/mK.. The plate is exposed to air at 30°C with a convection coefficient of 15 W/m?K. Determine the heat flow, the surface temperatures and the overall heat transfer coefficient. Also draw the equivalent circuit diagram.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A furnace wall is made up of three layer of thickness 150 mm, 110 mm, and 125mm with thermal conductivity of 1.65 W/m-K, k2, and 9.2 W/m-K respectively. Theinside is exposed to gases at 1050°C with a convection coefficient of 25 W/m2-Kand the inside surface temperature is at 900°C, the outside air temperature is at30°C with convection coefficient of 12 W/m2 -K. Calculate:a. the unknown thermal conductivity;b. the outside surface temperature and mid-plane temperatures in °F.
The external brick wall of a building has a surface area A of 830 m2 andthickness δ of 300 mm. The wall has a thermal insulation on its outer surface. The thermal conductivity of concrete k is 1.6 W/m K and of insulation is 0.04 W/m K. The indoor and outdoor air temperatures are ti = 21°C and to = 3°C, respectively. The heat-transfer coefficients are hi = 14 W/m2K (on the inner surface) and ho = 20 W/m2K (on the outer surface). Determine (1) the rate of heat loss through the wall without insulation and (2) the thickness of the insulation required to reduce the rate of heat loss by 60%.
i need the answer quickly
In an experiment to measure the thermal conductivity of a plate of unknown material with area 1 m2 and thickness 0.1m, one of its surfaces is maintained at 100 °C and the other at 20 °C and a heat at the rate of 100 kW was supplied across it. Determine the thermal conductivity of the hot plate. Is the material metallic, non-metallic, or gas/liquid?
A polished metal pipe (8 cm) outside diameter and 350 K temperature at the outer surface is exposed to ambient conditions at 285 K temperature. The emissivity of the surface is 0.3 and the convection coefficient of heat transfer is 13.5 W/m2-deg. What would be the overall coefficient of heat transfer by the combined mode of convection and radiation?
The outside temperature on a particular winter's day is 0°C. Consider two identical houses, each of external surface area 200 m² and internal temperature 20°C. The walls of the first are constructed of a single layer of brick, of thermal conductivity 1 W m-1 °C-1 and thickness 20 cm. What is the heat flux Q out of this house? What is its rate of heat loss in Watts? The walls of the second house are constructed of two layers of brick, each 10 cm thick, and a layer of insulation, also 10 cm thick. The insulation is made mostly out of air, thermal conductivity 0.01 W m of heat loss from this house? How different would your answer be if you neglected the layers of brick in this calculation? -1 °C-1. what are the heat flux and the rate
there is no radius only given thickness
A furnace wall comprises three layers of thickness 250 mm, 100 mm, and 150 mm with thermal conductivities of 1.65, k and 9. W/m K respectively. The inside is exposed to gases at 1250 ˚C with convection of 25 W/m2K, and the inside surface is at 1100 ˚C, the outside surface air at 25 ˚C with convection of 12 W/m2K. Determine the temperatures of the mid-inner surface in 0C to 1 d.p.?