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: The temperature gradient in a slab at steady conduction is - l000°C/m. The slab conducts heat at 250…

A:

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

A:

Q: A cylindrical tank is constructed from aluminum (kal = 240 W/m2.K) with 1 m inner diameter and 10 mm…

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: On a multi-layered square wall, the thermal resistance of the first layer is 0.005 ° C / W, the…

A: The thermal resistance of first layer is R1=0.005°C/W. The thermal resistance of second layer is…

Q: Give an example of a flexure formula?

A: The flexure formula is also known as the flexure bending equation and is defined as; Where, M is…

Q: What is the heat flow through the wall divided by wall area? W What is the heat flow (power) through…

A:

Q: Determine conductive resistance (in K/W) of a 80 m^2 plane wall composed of 2 layers:

A:

Q: 5- A wall is constructed of a section of stainless steel (k of plastic on both sides of the steel.…

A: Given data as per question For stainless steel k=1.6 W/m°C, thickness=4 mm=4×10-3 m Overall heat…

Q: On a summer day in Phoenix, Arizona, the inside room temperature is maintained at 68° F while the…

A: Given, TiF = 68 °FToF = 110 °F Here, o and i subscripts represent outdoor and indoor temperatures…

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: A wall has an overall U value of 0.25 W/m^2K. It includes a layer of insulation 50 mm thick. The…

A:

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: Two walls of a stol composed of insulating materia (k=0.25 KJ/hr-m-°C) with 15 cm thick and concrete…

A: Given   For insulating material Thermal conductivity, k1 = 0.25 kJ/hr.m.K…

Q: A leading manufacturer of household appliances is proposing a self-cleaning oven design that…

A: Given kA =0.15 W/mK kB = 0.08 W/mK Ta = 400 C  Troom = 25 C  Ts = 50 C ho = 25 W/m2K To find Minimum…

Q: 3.) A fluid has a temperature of 100C and thermal film coefficient of W 50 Solve for the heat…

A:

Q: Find the total conductive thermal resistance of a 2-m long two-layered cylindrical insulation jacket…

A:

Q: (b) A hydrogen gas cylinder is situated in the cylinder cage. The cylinder wall is constructed from…

A:

Q: A long, thin copper rod 5 mm in diameter is exposed to an environment at 20°C. The base temperature…

A:

Q: A furnace is made of a red brick wall of thickness 250 cm and conductivity 1.2 W/mK. Determine the…

A:

Q: A 1.0-mm-diameter wire is maintained at a temperature of 400 °C and exposed to a convection…

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: A wall with a thickness of 2 cm will be constructed from a material with a heat conduction…

A:

Q: A steam bath center in a gym consists of a wall three different material layers. First two layers…

A:

Q: Two plates, one of aluminum with a tickness of 14mm and one of brass with thickness of 9mm were…

A: Given: The thickness of aluminium plates, L1 = 14 mm = 0.014 The thickness of brass plates, L2 = 9…

Q: Consider a 0.6 m X 0.6 m epoxy laminate (k = 0.2 W/m-k) whose thickness is 5 mm. In order  to reduce…

A: Solution: Given Data: ke=0.2 W/m-Kt=5 mmkc=380 W/m-K∆T=20oCs=6 mmd=2 mm   To Find: (a) Thermal…

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

A: Given data

Q: The wall of a rectangular chemical tank consists of two layers- inner layer with 15 cm of copper (k…

A: Given, Lc = 15 cm kc = 385 W/m k Li = 10 cm ki = 60 W/m k ka = 0.17 W/m k

Q: A Thermopane window consists of two 3-mm-thick pane of glass separated by a stagnant air space of…

A:

Q: A composite wall made of two materials consists of a 10 cm thick layer of brick (kb=0.15 W/m/K) and…

A: Given:Thickness of layer of brick, Lb=10 cm=0.1 mThermal conductivity of brick, kb=0.15 W/m.KThermal…

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

A:

Q: Consider a composite wall of overall height H = 30 mm and thickness L = 40 mm. Section A has…

A:

Q: a. Consider a 5-m-high, 8-m-long, and 0.20-m-thick wall whose representative cross section is as…

A: Answer: The total thermal resistance of the wall is 0.2 K/W.

Q: wall having a thermal conductivity of vity 0.9 W/mK. If the heat rate is to b

A: given:thermal conductivity of composite structural k=0.3W/mKthickness t=100mmhermal conductivity of…

Q: 20 cm in size if the thermal contact conductance on both sides of the copper plate is estimated to…

A:

Q: A 1,155 ft², 4 in. thick concrete wall has inside and outside surface temperatures of 24°C and 4°C.…

A:

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

A: Given data: ◆ The thermal conductivity and thickness of stagnant air-pocket: Lair = 1.20 cm = 0.012…

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.