[2] Consider a conical enclosure of height h and base diameter D. Determine the view factor from the conical sidesurface to a hole of diameter d located at the center of the base.a.) View FactorA. d?/2DHB. d/2DHC. d?/3DHD. d/3DH

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Answered: Consider a conical enclosure of height…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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A furnace is located next to a dense array of cryogenic fluid piping. The ice-covered piping approximates a plane surface with an average temperature of Tp = 0°C and a total, hemispherical emissivity of εp = 0.53. That is, the piping can be replaced by a flat surface with the given properties. The furnace wall has a temperature of Tf = 206°C and a total, hemispherical emissivity of εf = 0.83. To minimize the heat loading on the regirgeration equipment and piping, a reflective aluminum radiation shield with a total, hemispherical emissivity of εs = 0.14 on each of its sides is installed between the pipiing and the furnace wall as shown. Assume that all surfaces are diffuse and gray and treat the problem as one-dimensional (surfaces form infinite parallel plates). What is the heat load on on the refrigeration unit? That is, what is the net radiative power at the surface which approximates the dense array of ice-cold piping, qrad,p in Watts?
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Determine the heat loss by radiation from an oven wall to the wall of a room to which the oven wall is directly facing. Assume that no heat flows through the adjacent walls, which are coated with a reradiating material. The oven wall is square, 4 ft on one side, and is 2 ft from the room wall and parallel to it. The oven wall is steel sheet and is at 400°F, and the wall is at 80°F and is of asbestos board.
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3. A star has a surface temperature of 5,500K. Determine the radiative heat transfer received by planet Z in Petawatts with diameter of 2100 km, temperature of surface of 300K and mean absorptivity of 0.8. Radiative energy loss due to radiation dispersion on outer space is 99%.
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Consider a conical enclosure of height h and base diameter D. Determine the view factor from the conical side face to a hole of diameter d located at the center of the base.