Problem 4 Emissivity/Absorptivity 0.8 30.6 ་ A white paint that can be used for passive radiative (b) 1 cooling under the Sun. Provided the following simplified spectral absorptivity/emissivity plot (α) or &) on the right, calculate the net radiative heat flux qrad from a uniform-temperature painted surface at Ts=300 K. The Sun's irradiation on Earth is Gsun 1380 W/m² and its blackbody temperature is Tsun = 5800 K. Ignore the radiation from the atmosphere (surroundings). 0.2 0 ° 3 5 DO Wavelength (um)
Problem 4 Emissivity/Absorptivity 0.8 30.6 ་ A white paint that can be used for passive radiative (b) 1 cooling under the Sun. Provided the following simplified spectral absorptivity/emissivity plot (α) or &) on the right, calculate the net radiative heat flux qrad from a uniform-temperature painted surface at Ts=300 K. The Sun's irradiation on Earth is Gsun 1380 W/m² and its blackbody temperature is Tsun = 5800 K. Ignore the radiation from the atmosphere (surroundings). 0.2 0 ° 3 5 DO Wavelength (um)
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter11: Heat Transfer By Radiation
Section: Chapter Questions
Problem 11.49P
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Question
![Problem 4
Emissivity/Absorptivity
0.8
30.6
་
A white paint that can be used for passive radiative (b) 1
cooling under the Sun. Provided the following
simplified spectral absorptivity/emissivity plot (α)
or &) on the right, calculate the net radiative heat
flux qrad from a uniform-temperature painted
surface at Ts=300 K. The Sun's irradiation on Earth
is Gsun 1380 W/m² and its blackbody temperature
is Tsun = 5800 K. Ignore the radiation from the
atmosphere (surroundings).
0.2
0
°
3
5
DO
Wavelength (um)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe7592660-efd4-4f1f-8224-71dd7028f46c%2F5c23e420-707b-474b-9615-a6268534c046%2Fx612ccl_processed.png&w=3840&q=75)
Transcribed Image Text:Problem 4
Emissivity/Absorptivity
0.8
30.6
་
A white paint that can be used for passive radiative (b) 1
cooling under the Sun. Provided the following
simplified spectral absorptivity/emissivity plot (α)
or &) on the right, calculate the net radiative heat
flux qrad from a uniform-temperature painted
surface at Ts=300 K. The Sun's irradiation on Earth
is Gsun 1380 W/m² and its blackbody temperature
is Tsun = 5800 K. Ignore the radiation from the
atmosphere (surroundings).
0.2
0
°
3
5
DO
Wavelength (um)
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