1, Two parallel disks, 80 cm in diameter, are separated by a distance of 10 cm and completely enclosed by a large room at 20°C. The properties of the surfaces are T1 = 620°C, E, = 0.9, T2= 220°C, E2= 0.45. What is the net radiant heat transfer with each surface? (Do not include back side exchange, only that from the surfaces facing each other.)

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Two parallel disks, 80 cm in diameter, are separated by a distance of 10 cm and
completely enclosed by a large room at 20°C. The properties of the surfaces
are T1 = 620°C, e, = 0.9, T2= 220°C, e2= 0.45. What is the net radiant heat
transfer with each surface? (Do not include back side exchange, only that from
the surfaces facing each other.)
Answers
1.
a)
Hot disk
watts
b)
Cold disk
watts
c)
Room
watts
Transcribed Image Text:Two parallel disks, 80 cm in diameter, are separated by a distance of 10 cm and completely enclosed by a large room at 20°C. The properties of the surfaces are T1 = 620°C, e, = 0.9, T2= 220°C, e2= 0.45. What is the net radiant heat transfer with each surface? (Do not include back side exchange, only that from the surfaces facing each other.) Answers 1. a) Hot disk watts b) Cold disk watts c) Room watts
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