9-24 A 0.5-m-long thin vertical copper plate is subjected to a uniform heat flux of 1000 W/m² on one side, while the other side is exposed to air at 5°C. Determine the plate midpoint temperature onosed to air at 5°C. Determine the plate midpoint temperature for (a) a highly polished surface and (b) a black oxidized surface. Hint: The plate midpoint temperature (T,2) has to be found itera- tively. Begin the calculations by using a film temperature of 30°C. Copper plate (highly polishe Copper plate (black oxidized) T surr Air Air 5°C 5°C TL2 (a) (b) We must consider radiation. Use ɛ = 0.02 for polished copper and ɛ = 0.73 for black oxide finish. Ans: a. 147.2°C b. 88.5°C. Show all steps and at least 1 iteration. 1000 W/m² 1000 W/m2

9-24 A 0.5-m-long thin vertical copper plate is subjected to a uniform heat flux of 1000 W/m² on one side, while the other side is exposed to air at 5°C. Determine the plate midpoint temperature onosed to air at 5°C. Determine the plate midpoint temperature for (a) a highly polished surface and (b) a black oxidized surface. Hint: The plate midpoint temperature (T,2) has to be found itera- tively. Begin the calculations by using a film temperature of 30°C. Copper plate (highly polishe Copper plate (black oxidized) T surr Air Air 5°C 5°C TL2 (a) (b) We must consider radiation. Use ɛ = 0.02 for polished copper and ɛ = 0.73 for black oxide finish. Ans: a. 147.2°C b. 88.5°C. Show all steps and at least 1 iteration. 1000 W/m² 1000 W/m2

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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(b) With the aid of diagram(s), discuss the variation of heat transfer coefficient with distance over a flat plate.
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At a particular location, the soil is initially at a uniform temperature of 15°C and the soil is subjected to a sub zero temperatúre of -20°C continuously for 50 days. What is the minimum burial depth required to ensure that the water in the pipes does not freeze? i.e., pipe surface temperature should not fall below 0°C.