The composite wall of an oven consists of three materials, with thermal conductivity, KA = 20 W/ m. kg = 30 W/ m. K, kc = 50 W/m. K, and known thickness, LA =30 cm, , LB =20 cm and Lc = 15 cm. Under steady- state operating conditions, measurements reveal an outer surface temperature of Tso =20°C, an inner surface temperature of Tsi = 600°C. The inside and outside convection coefficients are 25 W/m2. K and 15 W/m2. K. The wall repeats itself every 25 cm distance in the vertical direction and if the wall is 1-m deep and 0.25-m high, then assume an area of 0.25m2 for all your calculations. Find the total resistance. T. G00°c T 20°C Ke Air T, h
The composite wall of an oven consists of three materials, with thermal conductivity, KA = 20 W/ m. kg = 30 W/ m. K, kc = 50 W/m. K, and known thickness, LA =30 cm, , LB =20 cm and Lc = 15 cm. Under steady- state operating conditions, measurements reveal an outer surface temperature of Tso =20°C, an inner surface temperature of Tsi = 600°C. The inside and outside convection coefficients are 25 W/m2. K and 15 W/m2. K. The wall repeats itself every 25 cm distance in the vertical direction and if the wall is 1-m deep and 0.25-m high, then assume an area of 0.25m2 for all your calculations. Find the total resistance. T. G00°c T 20°C Ke Air T, h
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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Transcribed Image Text:The composite wall of an oven consists of
three materials, with thermal conductivity,
KA = 20 W/ m. kg = 30 W/ m. K, kc = 50
W/m. K, and known thickness, LA =30 cm,,
LB =20 cm and Lc = 15 cm. Under steady-
state operating conditions, measurements
reveal an outer surface temperature of Tso
=20°C, an inner surface temperature of Tsi
= 600°C. The inside and outside convection
coefficients are 25 W/m2. K and 15 W/m2. K.
The wall repeats itself every 25 cm distance
in the vertical direction and if the wall is 1-m
deep and 0.25-m high, then assume an area
of 0.25m2 for all your calculations. Find the
total resistance.
T- 600°c
T 20°c
Air
T, h
Select one:
O a. 10.525°C/W
O b. 5.526°C/W
O c. 0.526°C/W
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