Answered: h = 30 W/m²K Taj = 20°C h. = 60 W/m²K…

h = 30 W/m²K Taj = 20°C h. = 60 W/m²K Tzo =-15°C Fiberglass L=10 cm Plaster board Plywood L=2 cm k=0.13 W/mK k= 0.04 W/mK L=1 cm k= 0.15 W/mK

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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Question

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A house has a composite wall of wood, fiberglass insulation and plaster board, as indicated in Figure 2.1. The total wall surface area is 300 m².

- Represent the composite wall by a thermal circuit, and label all the
components in the circuit.

- Determine the total heat transfer rate, ?̇ through the wall and the inner surface temperature of the house.

h = 30 W/m?K
Tri = 20°C
h, = 60 W/m?K
T,o = -15°C
Fiberglass
L=10 cm
Plywood
L=2 cm
Plaster board
k = 0.04 W/mK
L=1 cm
k = 0.15 W/mK
'k= 0.13 W/mK
Figure 2.1

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