Heat and Mass Transfer: Fundamentals and Applications
5th Edition
ISBN: 9780073398181
Author: Yunus A. Cengel Dr., Afshin J. Ghajar
Publisher: McGraw-Hill Education
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Chapter 2, Problem 120P
A spherical tank is filled with ice slurry, where its inner surface is at 0°C. The tank has an inner diameter of 9 m, and its wall thickness is 20 mm. The tank wall is made of a material with a thermal conductivity given as
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The wall of a house is 7m wide and 6m high and is made from 0.3 m thick brick with a coefficient of thermal conductivity k = 0.6 W/m-K. The surface temperature inside the house is 6°C and that on the outside is 18°C. Find the amount of heat flow on the wall.
Q: A large plane wall of thickness (L= 0.3 m), thermal conductivity (k = 40 W/m-°C),
and surface area 0.4 m2. The left side of the wall is maintained at a constant temperature
of 70°C while the right side loses heat to the surrounding air with heat flux q' expressed
by:
1200k
q = k+20L
A- Find a relation to determine the variation of temperature in the wall.
B- Determine the rate of heat transfer through the wall.
C- Determine the temperature at the right side of the wall.
wall
T1= 70 °C
L= 0.3m
Its thickness is 1.18 m, its thermal conductivity is 2.75 W/m.°C and its surface area is 15m2Consider a wide plane wall. Inside of the base plateThere is a uniform heat flux produced on its surface with the help of the resistance wire inside.590 W/m2 on the left surface of the wall at x=0net heat fluxand the temperature on this surface was measured as 590 °C. On the wallassuming that there is no heat generation and that the thermal conductivity is constant;a) The differential equation for continuous one-dimensional heat conduction in the wall, andSet the boundary conditions.b) Solve the differential equation to obtain a relation for the temperature change at the wall.c) Calculate the heat loss rate from the wall.
Chapter 2 Solutions
Heat and Mass Transfer: Fundamentals and Applications
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