A spherical satellite of 2m diameter circles theearth at an altitude of 600 miles. Assuming allsurfaces are black, calculate the equilibriumtemperature of the satellite on the 'dark' sideand on the 'bright' side of the earth. Assumethe earth has a radius of 4,000 miles and atemperature of 200C. The suns temperaturecan be taken to be 6,700K and it has a radiusof 433,000 miles. The distance between thesun and the earth is 93,000,000 miles.View factor of a small sphere to a much largerone:S→LWhereR = '2ri is the radius of the large sphere and x is the separation distance between thespheres.

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Answered: A spherical satellite of 2m diameter…

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

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Radiation heat transfer Example: Q1: A large slab of steel 0.1 m thick has in it a 0.1 m-diam hole, with axis normal to the surface. Considering the sides of the hole to be black, specify the rate of radiative heat loss from the hole in W. The plate is at 811 K, the surroundings are at 300 K. A₁ T₁ = 811 k -D=0.1 m- A₂ A3 Hole T S=0.1 m
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 = 0.56. That is, the piping can be replaced by a flat surface with the given properties. The furnace wall has a temperature of Tf = 247°C and a total, hemispherical emissivity of εf = 0.86. To minimize the heat loading on the regirgeration equipment and piping, a reflective aluminum radiation shield with a total, hemispherical emissivity of εs = 0.13 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?
determine the view factor, and the net heat transfer by radiation between two gray surfaces, A (εA= 0.88) and B (εB= 0.65) at temperatures 450°C and 50°C, respectively if d. surfaces A and B concentric cylindrical tubes with diameters of 400 mm and 200 mm, respectively e. both surfaces are discs of diameter 3 m one exactly above the other, 1 m apart
A 30 x 30 cm door in a brick kiln is at a distance of 3.5 m from a wall 12 m wide and 5 m high. The door is so located that a normal from the center of the door strikes the wall midway from the ends and 1.5 m above the floor. The opening into the kiln may be considered a black body; the wall is painted flat paint (Ɛ = 0.46). The temperature inside the kiln is 1 400 C and the wall temperature is 60 C. Determine (a) the configuration factor F12 and (b) the net radiant heat exchange between the opening and the wall when the fire door is open?
A small gray sphere, with an emissivity coefficient of 0.5 and a surface temperature of 537°C, is located in a black body wrap with a temperature of 35°C. For this system, calculate the net rate of heat transfer per unit of surface area of the sphere.
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?
It's a complete question. Need help asap.
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A right circular cylinder has a height of 1 m and diameter of 75 cm. Find the view factor for the cylindrical to the base.
A blackbody of surface area 10 cm' is heated to 127°C and is suspended in a room at temperature 27°C. Calculate the initial rate of loss of heat fron the body to the room.
What is the solution to this problem?
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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