The rear window of an automobile is defogged by passing warm air over its inner surface. If the warm air is at T -40°C and the h₁ corresponding convection coefficient is - 30 W/m2.K, what are the inner and outer surface temperatures, in °C, of 4-mm-thick window glass, if the outside ambient air temperature is -17.5°C and the associated convection coefficient is 65 W/m2.K? Evaluate the properties of the glass at 300 K. ho = Too,0 =

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
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Heat transfer
The rear window of an
automobile is defogged
h₁ =
by passing warm air over its inner surface. If
the warm air is at T -40°C and the
corresponding convection coefficient is h - 30
W/m2.K, what are the inner and outer surface
temperatures, in °C, of 4-mm-thick window
glass, if the outside ambient air temperature is
Tu-17.5°C and the associated convection
=
coefficient is h. - 65 W/m2.K? Evaluate the
properties of the glass at 300 K.
Ts,i =
Ts,o=
i
i
°C
Transcribed Image Text:The rear window of an automobile is defogged h₁ = by passing warm air over its inner surface. If the warm air is at T -40°C and the corresponding convection coefficient is h - 30 W/m2.K, what are the inner and outer surface temperatures, in °C, of 4-mm-thick window glass, if the outside ambient air temperature is Tu-17.5°C and the associated convection = coefficient is h. - 65 W/m2.K? Evaluate the properties of the glass at 300 K. Ts,i = Ts,o= i i °C
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