2.36 WP As shown in Fig. P2.36, an oven wall consists of a 0.635-cm-thick layer of steel (x, = 15.1 W/m · K) and a layer of brick (K = 0.72 W/m · K). At steady state, a temperature decrease of 0.7°C occurs over the steel layer. The inner temperature of the steel layer is 300°C. If the temperature of the outer surface of the brick must be no greater than 40°C, determine the thickness of brick, in cm, that ensures this limit is met. What is the rate of conduction, in kW per m? of wall surface area? Steel | Brick T; = 300°C -T,5 40°C AT = -0.7°C L = 0.635 cm FIGURE P2.36

2.36 WP As shown in Fig. P2.36, an oven wall consists of a 0.635-cm-thick layer of steel (x, = 15.1 W/m · K) and a layer of brick (K = 0.72 W/m · K). At steady state, a temperature decrease of 0.7°C occurs over the steel layer. The inner temperature of the steel layer is 300°C. If the temperature of the outer surface of the brick must be no greater than 40°C, determine the thickness of brick, in cm, that ensures this limit is met. What is the rate of conduction, in kW per m? of wall surface area? Steel | Brick T; = 300°C -T,5 40°C AT = -0.7°C L = 0.635 cm FIGURE P2.36

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

2.36 WP As shown in Fig. P2.36, an oven wall consists of a
0.635-cm-thick layer of steel (x, = 15.1 W/m · K) and a layer of brick
(Kp = 0.72 W/m · K). At steady state, a temperature decrease of 0.7°C
%3D
occurs over the steel layer. The inner temperature of the steel layer is
300°C. If the temperature of the outer surface of the brick must be
no greater than 40°C, determine the thickness of brick, in cm, that
2
ensures this limit is met. What is the rate of conduction, in kW per m?
of wall surface area?
Steel
- Brick
T; = 300°C
- T, < 40°C
AT = -0.7°C
L = 0.635 cm
FIGURE P2.36

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