Consider a 0.8-m-high and 1.5-m-wide double-pane window consisting of two 4-mm-thick layers of glass (k 0.78 W/m °C) separated by a 10-mm-wide stagnant air space (k 0.026 W/m °C). Determine the steady rate of heat transfer through this double-pane window and the temperature of its inner surface for a day during which the room is maintained at 20°C while the temperature of the outdoors is 10°C. Take the convection heat transfer coefficients on the inner and outer surfaces of the window to be hl 10 W/m2 - °C and h2 40 W/m2 ·°C, which includes the effects of radiation. Glass Glass Air 20°C T2 T4 T3 -10°C 4 mm 10 mm 4 mm

Consider a 0.8-m-high and 1.5-m-wide double-pane window consisting of two 4-mm-thick layers of glass (k 0.78 W/m °C) separated by a 10-mm-wide stagnant air space (k 0.026 W/m °C). Determine the steady rate of heat transfer through this double-pane window and the temperature of its inner surface for a day during which the room is maintained at 20°C while the temperature of the outdoors is 10°C. Take the convection heat transfer coefficients on the inner and outer surfaces of the window to be hl 10 W/m2 - °C and h2 40 W/m2 ·°C, which includes the effects of radiation. Glass Glass Air 20°C T2 T4 T3 -10°C 4 mm 10 mm 4 mm

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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