A wall is constructed of two layers of 0.5-in-thick sheetrock (k = 0.10 Btu/h·ft·o F), which is a plasterboard made of two layers of heavy paper separated by a layer of gypsum, placed 7 in apart. The space between the sheetrocks is filled with fibreglass insulation (k = 0.020 Btu/h·ft·o F). Determine a) the thermal resistance of the wall, and b) its R-value of insulation in English units.

Q: a flat wall is covered with a layer of insulation 1.0 in. thick whose thermal conductivity is 0.8…

A:

Q: h = 30 W/m²K Taj = 20°C h. = 60 W/m²K Tzo =-15°C Fiberglass L=10 cm Plaster board Plywood L=2 cm…

A:

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: If you know that the coefficient of thermal conductivity from the air to the inner surface of the…

A: Given,

Q: . Btu/h ft °F) whose inner and outer diameters are 3.5 in. and 4.0 in., respectively, in an…

A:

Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…

A:

Q: Calculate the heat transfer rate per unit area of a 200 mm thick concrete wall at a surface…

A:

Q: Three of the following statements are true, but one is false. Indicate which one is false. A) There…

A: There is no any statement which is false. All the statements are true.

Q: Consider a cylindrical steel pipe of an inner radius of 2.9m, an outer radius of 3.2m, and thermal…

A: Given A cylindrical steel pipeinner radius (r1)=2.9 mouter radius (r2)=3.2 mThermal conductivity…

Q: It is necessary to insulate a flat surface so that the rate of heat loss per unit area of this…

A: Given, QA=450 W/m2 ∆T=400 K

Q: A house has a composite wall of wood, fiberglass insulation, and plaster board, as indicated in the…

A:

Q: The section of a vertical wall is made up of fiberglass insulation slabs separated by wooden studs.…

A:

Q: A furnace wall is made of 20 cm of magnesite brick and 20 cm of common brick. The magnesite brick is…

A: Given, T1 = 1200 C T2 = 35 C L1 = 20 cm = 0.2 m L2 = 20 cm = 0.2 m hi = 40 W/m2K ho = 20 W/m2K km =…

Q: A food cold storage room is to be constructed of an inner layer of 19.1 mm of pine wood, a middle…

A:

Q: 6. A steel pipe 1.5-m in length has an inside diameter of 7.6 cm with a wall thickness of 11.6 mm.…

A: calculating the total thermal resistance from the inside surface of the pipe to the outside of the…

Q: r surface of the wall is at 1100◦C, and the room temperature is 25◦C. The heat-transfer coefficient…

A: given:

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:

Q: A steel pipe (outside diameter 100 mm) is covered with two layers of insulation. The inside layer,…

A:

Q: A 4-m-high and 6-m-wide wall consists of a long 15-cm × 25-cm cross section of horizontal bricks (k=…

A:

Q: 12. A 3.1 cm long straight rectangular fin has a thickness of 2.7 mm. The thermal conductivity is 52…

A: What is the fin efficiency? Fin efficiency is the ratio of actual heat dissipated by the fin to the…

Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…

A: Given Data Outer diameter of the steel pipe is: do=100 mm=0.1 m Thickness of the inner layer is:…

Q: A hot steam pipe having an inside surface temperature of 250°C has an inside diameter of 8 cm and a…

A: The thermal resistance of a hollow pipe can be calculated using the formula given below as-…

Q: The outer facing of a room is constructed from 25 cm thick brick, 2.5 cm of mortar, 10 cm of…

A: Givent4=25cmk4=0.52 W/mKt3=2.5cmk3=0.52 W/mKt2=10cmk2=0.186 W/mKt1=1.2cmk1=0.096 W/mKA=10m2

Q: A steam pipe (inner diameter = 150 mm and outer diameter = 160 mm) having thermal conductivity 58…

A: Given, T1 = 320 °CT2 = 40 °CL = 1 mkpipe = 58 W/m °Ckins1 = 0.18 W/m °Ckins2 = 0.09 W/m °CInternal…

Q: Q2/ An insulated steam pipe having an outside Steam pipe diameter of 30 mm is to be covered with two…

A: Given Thermal conductivity(k1)=5k2 T1 and T2 are fixed Thickness = 20mm=0.02m Outside…

Q: A thick-walled tube of stainless steel with thermal conductivity k = 19 W/m°C has inner diameter of…

A:

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:

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

A:

Q: Calculate the heat loss in a pipe 109.7 mm inside diameter and 13.7 m length covered with a layer of…

A:

Q: Variation of the surface temperature of a pin fin is shown in the Figure. According to the figure,…

A: Given data

Q: Determine the resistance having a surface area of 1.14 m2 for a temporary insulating wall of a food…

A:

Q: A cold storage room is constructed of an inner layer of 12.7mm of pine, a middle inner of 101.6mm of…

A: Given, Ti = 255.4k To = 29701k Ki = 0.151 W/mk Km = 0.0433 W/mk Ko = 0.762 W/mk Li = 12.7 mm Lm =…

Q: A brick wall, plastered on one face, has a thermal conductance of 2.8 W/m^2-K, an inside surface…

A: Dear student,                     According to the guidelines I am allowed to answer only one…

Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…

A: Given data: The diameter of the steel pipe, d = 100 mm. The thickness of the inner insulation, t1 =…

Q: 12.6-1. Insulation Needed for Food Cold Storage Room. A food cold storage room is to be constructed…

A: Write the expression of heat loss.

Q: furnace wall is constructed of a firebrick that is 6 inches thick. The temperature of the inside of…

A: Solution.jpg

Q: QUESTION 2 The wall of a refrigerated truck consists of 1.5mm sheet steel outer surface, 10mm…

A:

Q: A two-layer wall is made of two metal plates, with surface roughness of about 25 mm, pressed…

A: Given data as per question Steel plate thickness =5 mm thermal conductivity of steel = 14 W/m∙K.…

Q: In a composite slab, the temperature at the interface (Te) between two materials is equal to the…

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

Q: A thick-walled tube of stainless steel with thermal conductivity k=19 W/m°C has inner diameter of 10…

A:

Q: A wall consists of a long 18-cm x 30-cm cross section of horizontal bricks (k = 0.72 W/m · °C)…

A:

Q: tion heat transfer coefficients on the inner and the outer sides are h1 = 12 W/m2 · °C and h2 = 20…

A: Given:

Q: (III) Suppose the insulating qualities of the wall of a house come mainly from a 4.0-in. layer of…

A: R value of the brick is Thermal conductivity of brick is 0.84 J/m·s°C R=lk=4 in0.84…

Q: ) Steel tube with a thermal conductivity 50 WI(m-K), the outer diameter of 108 mm and the wall…

A:

Q: Composite walls of a building are made of 8 cm of brick [k = 0.69 W/m·°C], 2 cm of Celotex [k =…

A:

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.