Answered: You are designing a heatsink to cool a…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

You are designing a heatsink to cool a 100mm tall, 100mm wide surface. The fins you use are vertically mounted thin plates, 2mm thick. The fins are spaced 5mm apart (pitch = 7mm) and protrude 50mm from the base. If the base temperature is 80 celsius , determine the optimum fin spacing.

Note- RT is 25 celsius

Transcribed Image Text:tanh mi., staight rectangular fins ml. V26r Staight triangular fins 1 !(2ml.) 4-V2 + (02y Straight parabolic fins NLIC, + (L)In(/L + C)) 1+ V(2mi + 1 C= VI + (L Crcular fins of rectangular profile K,(mr, . (m) -1(mr, 1K (mr,) mr, 1K, (mr) + Klmr, M,(mr) Th - C. 2r, /m 5-2-) C. = Pe fins of rectangular profile tanh mi, L-L- DI4 Pefis of triangular profile BEVURD 2 1,(2mL) ml. 1,(2ml.) VE + D/2 Pfs of parabolic profile 1, 0) -4, ()- (2/, (x) wherex- 2ml 20 S1+2 es ot parabolic profile Sat tip 5 Jml/3) 2ml. I4ml/3) TOP

Density
kg
Material
Specific
Latent Heat Latent Heat
Thermal
of Fusion,
of
Conductivity
Heat
kgKA
Vaporization
W
\mK.
kg.
Air
1.225
718
0.025
Aluminum
2712
900
396000
200
Ammonia
682
4400
1371000
(Liquid)
Cast Iron
7300
460
247000
40
Copper
8940
390
206000
400
Ероху
1200
1000
1.5
G10
1800
670
0.3
Fiberglass
Glass
2200
750
1
Silicone
1070
1300
0.2
Steel
7850
450
247000
20

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