mperature ofnermocouplekg/m³, andan ideal gas7-94 The components of an electronic system are located ina 1.5-m-long horizontal duct whose cross section is 20 cm x20 cm. The components in the duct are not allowed to comeinto direct contact with cooling air, and thus are cooled by airat 30°C flowing over the duct with a velocity of 200 m/min.If the surface temperature of the duct is not to exceed 65°C,determine the total power rating of the electronic devices thatcan be mounted into the duct.7-97flowIf the initialis corevaluate the0.3 mof the initialcities of the3Dto thetranstperform thefrom 1 toTreatme and thefree streamElectronico determinecomponentsinside9 percent oftion of this30°C200 m/min65°CAir1.5 mon20 cmFIGURE P7-94

Answered: determine the total power rating of the…

Engineering

Mechanical Engineering

determine the total power rating of the electronic devices

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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Concept explainers

Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.

Question

100%

mperature of
nermocouple
kg/m³, and
an ideal gas
7-94 The components of an electronic system are located in
a 1.5-m-long horizontal duct whose cross section is 20 cm x
20 cm. The components in the duct are not allowed to come
into direct contact with cooling air, and thus are cooled by air
at 30°C flowing over the duct with a velocity of 200 m/min.
If the surface temperature of the duct is not to exceed 65°C,
determine the total power rating of the electronic devices that
can be mounted into the duct.
7-97
flow
If the initial
is cor
evaluate the
0.3 m
of the initial
cities of the
3D
to the
transt
perform the
from 1 to
Treat
me and the
free stream
Electronic
o determine
components
inside
9 percent of
tion of this
30°C
200 m/min
65°C
Air
1.5 m
on
20 cm
FIGURE P7-94

Expert Solution

Step 1

Given:

$T_{\infty} = 30 ° C T_{s} = 65 ° C L = 1.5 m b = d = 20 c m = 0.2 m V = 200 m / m i n = 3.33 m / s$

To determine:

The total power rating of the electronics device

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