mponents in the duct are cooled

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1. The components of an electronic system dissipating 180 W are located in a 1.4m-long horizontal duct whose cross
section is 20 cm x 20 cm. The components in the duct are cooled by forced air that enters the duct at 30°C and 1 atm at
a rate of 0.6 m³/min and leaves at 40°C. Determine the rate of heat transfer, in Watts, from the outer surfaces of the
duct to the ambient.
Transcribed Image Text:1. The components of an electronic system dissipating 180 W are located in a 1.4m-long horizontal duct whose cross section is 20 cm x 20 cm. The components in the duct are cooled by forced air that enters the duct at 30°C and 1 atm at a rate of 0.6 m³/min and leaves at 40°C. Determine the rate of heat transfer, in Watts, from the outer surfaces of the duct to the ambient.
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