from the back side of the board to a medium at 37°C, with a heat transfer coefficient of 45 W/m²-K. (a) Determine the surface temperatures on the two sides of the circuit board. (b) Now a 0.1-cm-thick, 10-cm-high, and 15-cm-long alumi- num plate (k = 237 W/m-K) with 20 0.2-cm-thick, 2-cm-long, and 15-cm-wide aluminum fins of rectangular profile are at- tached to the back side of the circuit board with a 0.03-cm- thick epoxy adhesive (k = 1.8 W/m-K). Determine the new temperatures on the two sides of the circuit board. Electronic components Fin 15 cm 10.3 cm 10 cm 0.2 cm - 20 fins 2 cm 1 mm 2 mm FIGURE P3-190
from the back side of the board to a medium at 37°C, with a heat transfer coefficient of 45 W/m²-K. (a) Determine the surface temperatures on the two sides of the circuit board. (b) Now a 0.1-cm-thick, 10-cm-high, and 15-cm-long alumi- num plate (k = 237 W/m-K) with 20 0.2-cm-thick, 2-cm-long, and 15-cm-wide aluminum fins of rectangular profile are at- tached to the back side of the circuit board with a 0.03-cm- thick epoxy adhesive (k = 1.8 W/m-K). Determine the new temperatures on the two sides of the circuit board. Electronic components Fin 15 cm 10.3 cm 10 cm 0.2 cm - 20 fins 2 cm 1 mm 2 mm FIGURE P3-190
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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Transcribed Image Text:from the back side of the board to a medium at 37°C, with
a heat transfer coefficient of 45 W/m2-K. (a) Determine the
surface temperatures on the two sides of the circuit board.
(b) Now a 0.1-cm-thick, 10-cm-high, and 15-cm-long alumi-
num plate (k = 237 W/m-K) with 20 0.2-cm-thick, 2-cm-long,
and 15-cm-wide aluminum fins of rectangular profile are at-
tached to the back side of the circuit board with a 0.03-cm-
thick epoxy adhesive (k = 1.8 W/m-K). Determine the new
temperatures on the two sides of the circuit board.
Electronic
components
Fin
15 cm
10.3 cm
10 cm
0.2 cm
- 20 fins
2 cm
1 mm
2 mm
FIGURE P3-190
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