Time left 0:53:06 Consider an enclosure formed by tl having the following values of shape factors, emissivities and temperatures Surface 1 i.e. curved cylindrical has an emissivity 0.75 and temperature 800 K Surface 2 i.e. closing disc has an emissivity 0.8 and temperature 700 K Surface 3 i.e. closing disc has an emissivity 0.8 and temperature 700 K The closing flat discs are 25 mm in diameter and they have interspacing distance equal to 100 mm. If the shape factor between these two identical discs is 0.05, calculate the net rate of radiant heat flow from the curve surface to each of the closing end surface Disc 1 100 mm Cylindrical surface Disc 25 mm

Time left 0:53:06 Consider an enclosure formed by tl having the following values of shape factors, emissivities and temperatures Surface 1 i.e. curved cylindrical has an emissivity 0.75 and temperature 800 K Surface 2 i.e. closing disc has an emissivity 0.8 and temperature 700 K Surface 3 i.e. closing disc has an emissivity 0.8 and temperature 700 K The closing flat discs are 25 mm in diameter and they have interspacing distance equal to 100 mm. If the shape factor between these two identical discs is 0.05, calculate the net rate of radiant heat flow from the curve surface to each of the closing end surface Disc 1 100 mm Cylindrical surface Disc 25 mm

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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Concept explainers

Radiation

Radiation can be described as the energy in the form of a particular matter or electromagnetic waves traveling in the air and can be in the form of light, sound, and heat. Radiation can be detected through special instruments like X-rays. The radiation from a cooler object is less intense as compared to the radiation from hot objects.

Question

Time left 0:53:06
Consider an enclosure formed by tl
having the following values of shape factors,
emissivities and temperatures
Surface 1 i.e. curved cylindrical has an emissivity
0.75 and temperature 800 K
Surface 2 i.e. closing disc has an emissivity 0.8 and
temperature 700 K
Surface 3 i.e. closing disc has an emissivity 0.8 and
temperature 700 K
The closing flat discs are 25 mm in diameter and
they have interspacing distance equal to 100 mm.
If the shape factor between these two identical
discs is 0.05, calculate the net rate of radiant heat
flow from the curve surface to each of the closing
end surface
Disc
1
100 mm
Cylindrical
surface
Disc
3
25 mm
a.
4.561 W
b.
2.561 W
1.561 W
d.
3.561 W

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