The brick wall of a house measures 4 x 7 m and has a thickness of 0.3 m. The thermal conductivity of the brick is 0.69 W/m.K. If the inner and outer temperatures of the wall are 26oC and 8oC respectively, determine the rate of heat transfer through the wall.

The brick wall of a house measures 4 x 7 m and has a thickness of 0.3 m. The thermal conductivity of the brick is 0.69 W/m.K. If the inner and outer temperatures of the wall are 26oC and 8oC respectively, determine the rate of heat transfer through the wall.

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.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.19P: 1.19 A cryogenic fluid is stored in a 0.3-m-diameter spherical container is still air. If the...

See similar textbooks

Related questions

Q: Heat is conducted through a material with a temperature gradient of – 9000 °C/m. The conductivity of…

A: Given in problemtemperture gradient with length dTdx=9000 °C/m.Thermal conductivity (k) =…

Q: Steam at T∞ 1 = 320°C flows in a cast iron pipe (k = 80 W/m · °C) whose inner and outer diameters…

Q: Consider the base plate of a 1200-W household iron that has a thickness of L 0.5 cm, base area of A…

Q: 3. A 2-mm-diameter and 10-m-long electric wire is tightly wrapped with a 1-mm-thick plastic cover…

A: Data given -

Q: Two surfaces of a 2-cm-thick plate are maintained at 0°C and 100°C, respectively. If it is…

A: Given data: Thickness of plate, L = 2 cm Temperature of the surfaces, T1 = 0°C and T2 = 100°C Rate…

Q: 3- A 4-mm-diameter and 10-cm-long aluminum fin (k = 237 W/m:° C) is attached to a surface. If the…

Q: An aluminum pan with a thermal conductivity of = 237 /m.K is used to heat water as shown in the…

A: As per given D=15cm K=237 w/m°c Q=1400w T=105°c We have to determine temperature of outer surface

Q: A thin metal plate is insulated on the back and exposed to solar radiation on the front surface. The…

A: Given: The absorptivity of the metal plate is α=0.8 The temperature of the surrounding is T1=25 °C…

Q: The inside and outside surfaces of a 1-cm thick, 4-m squared-shaped

A: Given data⇒ Thickness (t)=1 cm=0.01 m Side of square(a)=4 m Inside temperature T1=90C=9+273T1=282 K…

Q: The temperature at the inner and outer surfaces of a boiler wall made of 20 mm thick steel and…

Q: Consider a large 3-cm-thick stainless steel plate in which heat is generated uniformly at a rate e,…

Q: Heat is transferred steadily through a 0.15-m thick 3 m by 5 m wall whose thermal conductivity is…

A: Given data Thickness =0.15m Wall dimension. 3m × 5m Thermal conductivity = 1.2 W/m°C Inner…

Q: The roof of an electrically heated house is 7 m long, 10 m wide, and 0.25 m thick. It is made of a…

A: Given: The length of the roof is l=7 m The width of the roof is w=10 m The thickness of the roof is…

Q: A wall of length "L" m and height "H" m is made from a thick bricklayer of 31 cm with thermal…

Q: Calculate the convection heat transfer coefficient value on the outer surface of the insulation to…

A: The environment air temperature is, T0=30°C The thickness of the insulating material is, L=4 cm The…

Q: A plane wall 15 – cm thick has a thermal conductivity given by the relation k = 2.0 + 0.0005 T, W/m…

A: Given data t=15 cm, K=2+0.0005 T ω/m.K T1=150°C T2=50°C Need to determine the rate of…

Q: A 12-cm × 18-cm circuit board houses on its surface 100 closely spaced logic chips, each dissipating…

A: Given information: The area of the circuit board, The number of chips = 100 The environment…

Q: The roof of an electrically heated home is 12m long, 16m wide, and 0.50m thick, and is made of a…

Q: An aluminum plate, with dimensions of 3 cm × 3 cm × 5 cm (length, width, and thickness,…

A: Given:Volume,V=3*3*5 =45 cm3q=150 J/sρ=2700 Kg/m3t=10 secmass 0f aluminium plate,m=2700*45*10-6…

Q: image 109

Q: Consider a 0.8-m-high and 1.5-m-wide glass window with a thickness of 8 mm and a thermal…

Q: Determine the heat energy transfer rate and thickness of the wall, if energy loss is 10139 kJ in 9…

Q: The thermal resistance for a :solid sphere is equal to Non of them (2n k. ro. ri)/(ro-ri) O (2n ro .…

A: Given:- Solid sphere To find:- Thermal resistance

Q: A long pipe carries hot water and loses heat by convection to the surrounding air at Too=16 °C and…

Q: Consider a 0.8-m-high and 1.5-m-wide glass window with a thickness of 8 mm and a thermal…

A: Given Data h1=10 W/m2°C h2=40 W/m2°C L=0.8 m b=1.5 m Area is A=LB=0.8×1.5=1.2 m2 Thickness is t=8…

Q: Determine the average rate of heat transfer into your room through walls and roof. Consider the…

A: Given data: Inside wall temperature, Ti = 20°C. Outside wall temperature, To = 46°C. Heat transfer…

Q: The temperature at the inner and outer surfaces of a boiler wall made of 25 mm thick steel and…

Q: 4. A box with total wall area of 0.6m² and wall thickness 3cm is used to cool drinks. The inner and…

A: We are authorized to answer one question at a time since you have not mentioned which question you…

Q: The rate of heat flow through a hallow sphere of inner radius 0.25 m and outer radius 0.35m, whose…

Q: Shown below is an insulated copper block that receives energy at a rate of 100 W from an embedded…

Q: Question 2: Consider a 0.8-m-high and 1.5-m-wide glass window with a thickness of 8 mm and a…

A: Given Area = 0.8 x 1.5 = 1.2 m2L = 8 mm = 0.008 mK = 0.78 wm-kQ = ? , T1 = ? , T∞1 = 20°c , T∞2 =…

Q: A 14-cm x 20-cm circuit board houses on its surface 100 closely spaced logic chips, each dissipating…

Q: rate of (15000) W/m³. The conductivity of the sphere is 10 W/m.K. Surface of the sphere is cooled by…

A: Here, given values..

Q: A flat plate has one surface insulated and the other exposed to the sun. The exposed surface absorbs…

A: Given data, T2=350 K e=0.9 h= 10 W/m².K Q= 700 W/m² Let T1 be the temperature of surface

Q: A cat has a body temperature of 48 ºC. She stays inside a closed air conditioned room that has an…

A: Find the heat loss per unit area from the cate

Q: A 339-ft-long section of a steam pipe whose outer diameter is 4 inches passes through an open space…

A: GivenLength of pipe=339ftOuter diameter=4inchesSpace temp=50°FSurface temp Ts=297°FAverage heat…

Q: QI: At winter design conditions, a house is projected to lose heat at a rate of 65,000 Btu/h. The…

A: Projected heat loss rate = 65000Btu/hInternal heat gain =6000Btu/hSo net heat loss = 65000-6000 =…

Q: Heat is generated inside a solid cylinder (D=30 cm, L=90 cm, k=5 W/m.K ) at q=6x104 W/m2. Determine…

Q: Steam at To1 = 320°C flows through a cast iron pipe (k = 80 W/mK) with inner and outer diameters of…

Q: Two surfaces of a 2-cm-thick plate are maintained at 0°C and 80°C, respectively. If it is determined…

Q: Q3/ The north wall of an electrically heated home is 20 ft long, 10 ft high, and 1 ft thick, and is…

Q: : A thin metal plate is insulated on the back and exposed to solar radiation on the front surface.…

Q: Consider a 1.2-m-high and 2-m-wide glass window whose thickness is 6 mm and thermal conductivity is…

A: Write the given information.

Q: Refractory bricks are used as linings for furnaces, and they generally have low thermal conductivity…

A: Given data Thermal conductivity of the furnace wall lining K=1 W/mK Thermal diffusivity = 5.08 *…

Q: Consider a 0.5 m high and 2.5 m wide glass window with a thickness of 5 mm and thermal conductivity…

Q: 1- Consider a 1 m high and 2 m wide glass window whose thickness is 8 mm and thermal conductivity is…

Q: A mother takes the milk to be given to her baby from the refrigerator and pours it into a…

A: Suppose the system is treated as a lumped system. Write the equation of temperature difference for a…

Q: The heat flux from a wall to air in motion having a heat transfer coefficient of 15 W/m². K and…

A: Given data Heat transfer coefficient (h)=15 W/m2K Change in temperature (dT)=20 oC

Question

The brick wall of a house measures 4 x 7 m and has a thickness of 0.3 m. The thermal conductivity of the brick is 0.69 W/m.K. If the inner and outer temperatures of the wall are 26^oC and 8^oC respectively, determine the rate of heat transfer through the wall.

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

Trending now

This is a popular solution!

Step by step

Solved in 2 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

Heat is transferred at a rate of 0.1 kW through glass wool insulation (density=100kg/m3) with a 5-cm thickness and 2-m2 area. If the hot surface is at 70C, determine the temperature of the cooler surface.
1.60 Two electric resistance heaters with a 20 cm length and a 2 cm diameter are inserted into a well-insulated 40-L tank of water that is initially at 300 K. If each heater dissipates 500 W, what is the time required for bringing the water temperature in the tank to 340 K? State your assumption for your analysis.
Show that the rate of heat conduction per unit length through a long, hollow cylinder of inner radius ri and outer radius ro, made of a material whose thermal conductivity varies linearly with temperature, is given by qkL=TiTo(rori)/kmA where Ti = temperature at the inner surface To = temperature at the outer surface A=2(rori)/ln(ro/ri)km=ko[1+k(Ti+To)/2]L=lenthofcyclinder
2.34 Show that the temperature distribution in a sphere of radius . made of a homogeneous material in which energy is released at a uniform rate per unit volume , is
2.55 A long, 1-cm-diameter electric copper cable is embedded in the center of a 25-cm-square concrete block. If the outside temperature of the concrete is 25oC and the rate of electrical energy dissipation in the cable is 150 W per meter length, determine temperatures at the outer surface and at the center of the cable.
A cooling system is to be designed for a food storage warehouse for keeping perishable foods cool prior to transportation to grocery stores. The warehouse has an effective surface area of 1860 m2 exposed to an ambient air temperature of 32C. The warehouse wall insulation (k=0.17W/(mK)) is 7.5 cm thick. Determine the rate at which heat must be removed (W) from the warehouse to maintain the food at 4C.
3.16 A large, 2.54-cm.-thick copper plate is placed between two air streams. The heat transfer coefficient on one side is and on the other side is . If the temperature of both streams is suddenly changed from 38°C to 93°C, determine how long it takes for the copper plate to reach a temperature of 82°C.
What are the important modes of heat transfer for a person sitting quietly in a room? What if the person is sitting near a roaring fireplace?
2.38 The addition of aluminum fins has been suggested to increase the rate of heat dissipation from one side of an electronic device 1 m wide and 1 m tall. The fins are to be rectangular in cross section, 2.5 cm long and 0.25 cm thick, as shown in the figure. There are to be 100 fins per meter. The convection heat transfer coefficient, both for the wall and the fins, is estimated to be K. With this information determine the percent increase in the rate of heat transfer of the finned wall compared to the bare wall.
Two surfaces of a 2-cm-thick plate are maintained at 0°C and 100°C, respectively. If it is determined that heat is transferred through the plate at a rate of 500 W/m2 , determine its thermal conductivity.
A spherical container with an inner radius r1 = 1 m and an outer radius r2 = 1.05 m has its inner surface subjected to a uniform heat flux of q1=7kw/m^2. The outer surface of the container has a temperature T2 = 25°C, and the container wall thermal conductivity is k = 1.5 W/m·K. Show that the variation of temperature in the container wall can be expressed as and determine the temperature of the inner surface of the container at r = r1.
The inside and outside surfaces of a 1-cm thick, 4-m squared-shaped window glass in winter are 9°C and 1°C, respectively. If the thermal conductivity of the glass is 0.78 W/m-K, determine the heat loss, in kcal, through the glass over a period of 8 hours.