8 MULTILAYER PLANE WALLS. Exercise 3: Consider a 0.8 m x1.5 m double panel window consisting of two 4 mm thick layers of glass (k 0.78 W/m-oC) separated by a 10 mm wide stagnant air space (k = 0.026 W/m-oC). %3D %3D Determine: TA 43°C T (a) Steady-state heat transfer rate through the window; 21C T (b) Temperature of the inner surfaces (T, ,) for a day during which the room is maintained at 21°C while the temperature outdoor is 43°C. Neglect the convection of the air on both sides of the window. 4 mm 10 mm 4 mm Ra 24 January 2022

8 MULTILAYER PLANE WALLS. Exercise 3: Consider a 0.8 m x1.5 m double panel window consisting of two 4 mm thick layers of glass (k 0.78 W/m-oC) separated by a 10 mm wide stagnant air space (k = 0.026 W/m-oC). %3D %3D Determine: TA 43°C T (a) Steady-state heat transfer rate through the window; 21C T (b) Temperature of the inner surfaces (T, ,) for a day during which the room is maintained at 21°C while the temperature outdoor is 43°C. Neglect the convection of the air on both sides of the window. 4 mm 10 mm 4 mm Ra 24 January 2022

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

Heat transfer

24 January 2022- . .
8 MULTILAYER PLANE WALLS.
Exercise 3:
Consider a 0.8 m x1.5 m double panel window consisting of two 4 mm thick layers of
glass (k = 0.78 W/m-oC) separated by a 10 mm wide stagnant air space (k = 0.026
W/m-oC).
%3D
%3D
Determine:
43°C TA
(a) Steady-state heat transfer rate through the window;
Ta
21°C T
(b) Temperature of the inner surfaces (T, ,) for a day during
which the room is maintained at 210C while the temperature
outdoor is 43°C. Neglect the convection of the air on both sides
of the window.
4 mm
10 mm
4 mm
Rg
R2
Ra
24 January 2022
16

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