The surfaces of a two-surface enclosure exchange heat with one another by thermal radiation. Surface 1 has
Question:
The surfaces of a two-surface enclosure exchange heat with one another by thermal radiation. Surface 1 has a temperature of 400 K, an area of 0.2 m2, and a total emissivity of 0.4. Surface 2 is black, has a temperature of 600 K, and an area of 0.3 m2. If the view factor F12 is 0.3, the rate of radiation heat transfer between the two surfaces is
(a) 87 W
(b) 135 W
(c) 244 W
(d) 342 W
(e) 386 W
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Related Book For 
Heat And Mass Transfer Fundamentals And Applications
ISBN: 9780073398181
5th Edition
Authors: Yunus Cengel, Afshin Ghajar
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