3-194 A 4-m-high and 6-m-long wall is constructed of two large 0.8-cm-thick steel plates (k= 15 W/m-K) separated by 1-cm-thick and 22-cm-wide steel bars placed 99 cm apart. The remaining space between the steel plates is filled with fiberglass insulation (k=0.035 W/m-K). If the temperature difference between the inner and the outer surfaces of the walls is 22°C. determine the rate of heat transfer through the wall. Can we

3-194 A 4-m-high and 6-m-long wall is constructed of two large 0.8-cm-thick steel plates (k= 15 W/m-K) separated by 1-cm-thick and 22-cm-wide steel bars placed 99 cm apart. The remaining space between the steel plates is filled with fiberglass insulation (k=0.035 W/m-K). If the temperature difference between the inner and the outer surfaces of the walls is 22°C. determine the rate of heat transfer through the wall. Can we

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.56P

See similar textbooks

Related questions

Q: There are 3 people in a hemispherical house with an inner radius of 1.8 m, designed for short-term…

Q: The outer wall consists of a 30 cm thick brick wall which is covered by a layer of styrofoam. How…

Q: The window of a room is made of 5 mm thick glass which has a thermal conductivity of 1.4 W/m-K. A…

A: Given:Thickness of glass window = L = 5 mm = 0.005 mThermal conductivity of glass = k = 1.4…

Q: 3-201 Steam in a heating system flows through tubes whose outer diameter is 3 cm and whose walls are…

A: Write all the given variables in the problem along with their proper notations.

Q: A spherical tank with internal diameter of 2 m made of 2.0-cm-thick stainless steel (k=15 W/m.K) is…

A: Note: As per our guidelines we are supposed to answer only the first 3 sub-parts. Kindly repost…

Q: You are trying to assess the performance of a heat sink with fins. It has straight rectangular…

Q: Q2 A 2 kW resistance heater wire with thermal conductivity of k = 20 W/m °C, a diameter of D = 5 mm,…

Q: A cylindrical cold storage facility with an inner diameter of 4m and height of 2m is constructed.…

Q: 10 hot rods (L = 5 m and d = 2 cm) are buried in the ground parallel to each other each rod is 10 cm…

A: The given information in the problem is shown in the following attached image:

Q: Liquid flows in a metal pipe with an inner diameter of D1 = 22 mm and an outer diameter of D2 = 32…

Q: A rectangular wall of length "L" m and height "H" m is made from a thick bricklayer. The rectangular…

Q: The wall of a cold storage is made of 16 cm thick brick, the outer part, then 10 cm thick plastic…

Q: A 10-in-thick, 26-ft-long, and 10-ft-high wall is to be constructed using 9-in-long solid bricks (k=…

Q: A steel pipe 50 cm in length has an inside diameter of 9 cm with a wall thickness of 15 mm. The…

Q: Consider a steam pipe of length 15 ft, inner radius 2 in., outer radius 2.4 in., and thermal…

Q: 3-19 Consider a 1.2-m-high and 2-m-wide double-pane win- dow consisting of two 3-mm-thick layers of…

A: Find Steady rate of heat transfer

Q: = A hot surface at 100°C is to be cooled by attach- ing 3-cm-long, 0.25-cm-diameter aluminum pin…

A: Introduction: Fins are utilized in many applications to improve heat transfer from surfaces. The fin…

Q: Two rods ( fins) having same dimensions , one made of brass ( k = 85 Wm K) and the other of copper (…

A: Given data: - The thermal conductivity of brass rod is kB = 85 W/m-K. The thermal conductivity of…

Q: A chamber wall (1m x 2m) has an inside temperature of -4°C. The outside temperature is 22°C.…

Q: Consider a large plane wall of thickness 2L=20mm. Both surfaces of the wall are convectively cooled…

A: we can get a solution by using a space increment of ∆x=2mm. The nodal network will yield 6 unknown…

Q: A 5.1-m internal diameter spherical tank made of 1.6-cm-thick stainless steel (k = 15 w/m- c) is…

Q: Oil whose temperature is 30°C is flowed through a pipe with a diameter of 50 cm. The pipe is in an…

Q: A 4-mm and 2-m-long electric wire is tightly wrapped with a 2-mm-thick plastic cover whose thermal…

A: Write the given value using suitable variables. Here r1 signifies wire radius, L signifies wire…

Q: A cylindrical cold storage facility with an inner diameter of 4m and height of 2m is constructed.…

Q: Question 4 The window of a room is made of 5 mm thick glass which has a thermal conductivity of 1.4…

Q: Consider a 5.5-m-high, 8-m-long, and 0.22-m-thick wall whose representative cross section is as…

A: From the figure, we can say that, RC, RB and RC are in parallelso net resistance 1R1=1RC+1RB+1RCas…

Q: A 10-in-thick, 26-ft-long, and 10-ft-high wall is to be constructed using 9-in-long solid bricks (k…

A: Given Thickness = 10 in Long = 26 ft Highest = 10 ft Brick length = 9 in k = 0.40 BTU/ h F Cross…

Q: 3-28E A wall is constructed of two layers of 0.6-in-thick sheetrock (k = 0.10 Btu/h-ft-°F), which is…

A: Thickness of fiber glass insulation, L = 7 in.Thermal conductivity of sheetrock Ks = 0.10 Btu/h. ft.…

Q: Assume the outside air temperature is 38°C and the inside temperature is 20°C; there is an average…

A: To calculate the rate of heat lossgiven the dimensions of the wall, insulated R value given…

Q: 3-52 A 4-m-high and 6-m-wide wall consists of a long 18-cm X 30-cm cross section of horizontal…

Question

Insert Space
61
Exercise 6
A
3-194 A 4-m-high and 6-m-long wall is constructed of two
large 0.8-cm-thick steel plates (k= 15 W/m-K) separated by
1-cm-thick and 22-cm-wide steel bars placed 99 cm apart. The
remaining space between the steel plates is filled with fiberglass
insulation (k=0.035 W/m-K). If the temperature difference
between the inner and the outer surfaces of the walls is 22°C.
determine the rate of heat transfer through the wall. Can we
ignore the steel bars between the plates in heat transfer analysis
since they occupy only 1 percent of the heat transfer surface area?
Steel plates
0.8 cm
22 cm
Fiberglass
insulation
99 cm
1 cm
0.8 cm
Pencil
+
>

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

There are 3 windows in a room with a width of 100 cm and a height of 150 cm.There is a single glass (k=0. 9 W/mK) of 5 mm thickness in the windows initially. Instead of these glasses to save heatYou are considering replacing it with double glazing consisting of 5 mm glass and 12 mm air (k=0.022 W/mK). Indoor and outdoor environmenttemperatures are 20 0C and -10 0C, respectively, and the heat transfer coefficients are 7 W/m2 K and 25 W/m2 K. The total heat loss in the room is 3.5 kW.when switching to double glazing;a) Find the decrease in heat transfer. b) Considering that the heat given by the heaters remains 3.5 kW, what would the room temperature be?
Plz plz solve this within 50 min Because I have to submit it in 1 hr pLz help me
A rectangular steel plate having a area of 750 cm² is heated from 20 °C to 220 °C. What is its change in area? (Coefficient of linear expansion for steel is 11 x 10 -6/ºC) O 6.6 cm2 O 1.65 cm? O 3.3 cm? O 0.82 cm2
A cylindrical cold storage facility with an inner diameter of 4m and height of 2m is constructed. For the wall, the first layer is 6 cm of glass wool (0.1 W/m-C), followed by 30 cm of concrete. The temperature inside is maintained at -10C (hin = 55 W/m^2-C) while the outside temperature is 10°C (hout = 22 w/m^2-C). If the steady rate of heat transfer is at 60W, (a) what is the thermal conductivity of concrete? (b) At what radius is the temperature at 0°C? To prevent water condensation inside the concrete wall (which damages the structure), A 5 cm layer of insulation (k = 0.15 W/m-C) is added to the exterior of the facility. (c) What is the new rate of heat transfer?
A cylindrical cold storage facility with an inner diameter of 4m and height of 2m is constructed. For the wall, the first layer is 6 cm of glass wool (0.1 W/m-C), followed by 30 cm of concrete. The temperature inside is maintained at -10C (hin = 55 W/m^2-C) while the outside temperature is 10°C (hout = 22 w/m^2-C). If the steady rate of heat transfer is at 60W, (a) what is the thermal conductivity of concrete? (b) At what radius is the temperature at 0°C? To prevent water condensation inside the concrete wall (which damages the structure), A 5 cm layer of insulation (k = 0.15 W/m-C) is added to the exterior of the facility. (c) What is the new rate of heat transfer? (d) What is the temperature at the interface of the concrete wall and new insulation? (e) is condensation within the core of the wall prevented?
3-52 A 4-m-high and 6-m-wide wall consists of a long 18-cm X 30-cm cross section of horizontal bricks (k = 0.72 W/m . °C) separated by 3-cm-thick plaster layers (k = 0.22 W/m . °C). There are also 2-cm-thick plaster layers on each side of the wall, and a 2-cm-thick rigid foam (k = 0.026 W/m - °C) on the inner side of the wall. The indoor and the outdoor temperatures are 22°C and −4°C, and the convec- tion heat transfer coefficients on the inner and the outer sides are h₁ = 10 W/m² . °℃ and h₂ = 20 W/m². °C, respectively. Assuming one-dimensional heat transfer and disregarding radi- ation, determine the rate of heat transfer through the wall. Foam Plaster Brick 1+₂+18 2 FIGURE P3-52 18 cm N 1.5 cm 30 cm 1.5 cm
A 4-m-high and 6-m-wide wall consists of a long 18-cm x 30-cm cross section of horizontal bricks (k = 0.72 W/mK) separated by 3-cm-thick plaster layers (k=0.22 W/mK). There are also 2-cm-thick plaster layers on each side of the wall, and a 2-cm-thick rigid foam (k=0.026 W/mK) on the inner side of the wall. The indoor and outdoor temperatures are 22°C and -4°C, and the convection heat transfer coefficients on the inner and the outer sides are h1= 10 W/m2K and h2= 20 W/m2K, respectively.Assuming one-dimensional heat transfer and disregarding radiation, determine the rate of heat transfer through the wall.
What’s the correct answer for this please ?
An insulated vertical cylindrical vessel of cross- sectional area A = 0.12 m² contains 20 mol of He gas at To = 300 K and Po= 0.5 bar. It is capped by a movable piston of mass m = 150 kg supported from the ceiling by a wire. The top of the vessel is open to the atmosphere (Patm= 1 bar, Tatm= 300K). The wire is cut and the weight falls and com- presses the gas. Patm 160 E Wir og SLOWA He gas 1019 (a) Obtain the pressure and temperature of the gas a short time after the wire has been cut, when a negligible amount of heat transfer has taken place. Comment on whether your solution takes into account the inevitable oscillations of the piston around its equilibrium position before it comes to rest. mut Ispl (b) After a long time, the He gas thermally equilibrates with the environ- ment by heat transfer through the piston. How much heat is exchanged with the environment during this process? Helium can be considered an ideal gas at all conditions of interest, with C₁=3R/2. INST
A 4-m-high and 6-m-wide wall consists of a long 18-cm x 30-cm cross section of horizontal bricks (k = 0.72 W/m-K) separated by 3-cm-thick plaster layers (k = 0.22 W/m-K). There are also 2-cm-thick plaster layers on each side of the wall, and a 2-cm thick rigid foam (k = 0.026 W/m-K) on the inner side of the wall. The indoor and the outdoor temperatures are 38°C and -4°C, respectively, and the convection heat transfer coefficients on the inner and the outer sides are hy = 10 W/m2-K and h2 = 20 W/m2K, respectively. Assuming one-dimensional heat %3D transfer and disregarding radiation, determine the rate of heat transfer through the wall (in W). Foam Plaster Brick
A horizontal pipe having a surface temperature of 67 °C and diameter of 20 cm is buried at a depth of 1 m in the earth at a location where k = 1.8 W/m-°C. The earth surface temperature is 15 °C. Calculate the shape factor if the pipe length is 10 m.
The composite wall which is composed of 10 cm brick (k=0.40 W/m2-C), 2 cm cellotex (k=0.03 W/m2- OC), and 6 cm (k=0.30 W/m2-OC),has an outer (brick) temperature T=23 OC and an inner (plaster)temperature T=90 OC. Find the temperature between the cellotex andplaster in OC.