A 4-m-high and 6-m-wide wall consists of a long18-cm * 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 eachside 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 temperaturesare 22°C and 24°C, and the convection heat transfercoefficients on the inner and the outer sides are h1 = 10 W/m2·Kand h2 = 20 W/m2·K, respectively. Assuming one-dimensionalheat transfer and disregarding radiation, determine the rate ofheat transfer through the wall.

Q: Two metal rods are being heated in an oven with uniformambient temperature of 1000°C and convection…

A: Given Data: Ambient temperature is: T∞=1000 °C Convective heat transfer coefficient is: h=25 W/m2 K…

Q: An IC with a surface area of 4,000 mm2 is cooled by a heatsink attached to its top surface.  The…

A: Given surface area of the IC, A=4000 mm2=4×10-3 m2. Manufacturer thermal resistance rating of the…

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: 4- A furnace wall consists of three layers of blocks. The inner layer is of 10 cm thickness made of…

A: The above question is related to the concept of heat transfer. Heat is nothing but the energy…

Q: A 4-m high and 6-m-wide wall consists of long 15-cm x 20 cm cross section horizontal bricks (k of…

A: Solution: Given Data: h=4 mw=6 mA=15 cm X 20 cmkb=0.69 W/m-Ktp=2 cmkp=0.2 W/m-Ktf=3 cmkf=0.025…

Q: A 4-m-high and 6-m-wide wall consists of a long 18-cm x 30-cm cross section of horizontal bricks (k…

A: Given, The height of the wall, H=4 m The width of the wall, W=6 m Thermal conductivity of brick,…

Q: A steel pipe (k = 45.0 W/m-K) having a 0.05m O.D is covered with a 0.042 m thick layer of magnesia…

A:

Q: Steam at 230°C is flowing through a steel pipe (k = 15.1 W/m-K) whose inner and outer diameters are…

A:

Q: Steam at 120°C flows in a cast iron pipe (k = 80 W/m K) whose inner and outer diameters are Di = 5…

A:

Q: The rectangular wall of a furnace consists of 3in. fire clay brick surrounded by 0.25in. of steel on…

A:

Q: A container, spherical in shape, with an outside diameter of 30 cm holds a hot fluid at 180°C. The…

A:

Q: In a pharmaceutical plant, a copper pipe (kc= 400 W/m-K) with inner diameter of 20 mm and wall…

A: GivenD1=20mmt=0.07m=70mmD2=70+70=140mmTi=-200°C=-200+273=73kT∞=20°C=20+273=293K

Q: A long water channel is covered with an aluminum cover 8 mm thick and 240 mm wide. The water flowing…

A:

Q: A plane wall surface at 200°C is to be cooled with aluminum pin fins of parabolic profile with blunt…

A: Given data as per question Plane wall surface temperature = 2000c Length of fin = 25 mm Diameter =4…

Q: One wall of a refrigerated warehouse is 10.0-m-high and 5.0-m-wide. The wall is made of three…

A: Consider the diagram shown below for the given wall.

Q: A 2.2-mm-diameter and 10-m-long electric wire istightly wrapped with a 1-mm-thick plastic cover…

A: Write the expression of the power generated by the current. Write the expression of the…

Q: Consider a jacket made of five layers of 0.1-mm-thick synthetic fabric (k = 0.13 W/m-°C) with…

A:

Q: One side of a copper (401 W/m-oC) block 5 cm thick is maintained at 175 oC, the other side is…

A:

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:

Q: There is a 1.20-cm-thick stagnant air pocket. A) What thickness of cork would have the same…

A: Given data, (1) Stagnate air pocket t1 = 1.2 cm  K1 = 0.023 W/m.k Cork K2 = 0.046 W/m.k t2 =…

Q: The walls of a food storage facility are made of a 2-cm-thick layer of wood (k =0.1 W/m-K) in…

A:

Q: A hot surface at 100°C is to be cooled by attaching 3-cm-long, 0.25-cm-diameter aluminum pin fins (k…

A: To Find: The rate of heat transfer from the surface. Given : The surrounding temperature is…

Q: A cylinder 5 cm diameter and 50 cm long, is provided with 14 longitudinal straight fins of 1 mm…

A: The solution is given below

Q: A 4-m high and 6-m-wide wall consists of long 15-cm x 20 cm cross section horizontal bricks (k of…

A: To Find: The heat transfer rate through the wall.

Q: A hot 5x5-cm² surface at base temperature Tb = 100°C is to be cooled by attaching 3-cm-long pin fins…

A:

Q: A wall is constructed of two layers of 0.5-in-thick sheetrock (k = 0.10 Btu/h·ft·o F), which is a…

A: It the question it is given as 0.5 in thickness but in image it is 0.7 in thickness so I have taken…

Q: Water is heated by submerging 50 mm-diameter, thin-walled copper tubes in a tank and passing hot…

A:

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: In a pharmaceutical plant, a copper pipe (kc = 400 W/m·K) with inner diameter of 20 mm and wall…

A: The related diagram of the pipe is given as, The temperature T1 is written as, The temperature T3…

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.