Q: Consider the section of multilayers wall as shown in the figure, assuming one dimensional heat flow, determine the following: I- The thickness of wall layers LI and L2 as shown in the figure. II- Inner and outer surface temperatures TI and T3 III- Rate of heat transfer per unit area (Im') through the wall. To1 = 320 °C To2 = 20 °C T2 = 240 °C T1 T2 T3 hị = 300 W/m?.C k1 k2 h2 = 50 W/m?. C kl = 10 W/m .°C %3D To2 To1 hi h2 %3D k2 = 0.5 W/m.°C L = 40 cm L1 L2

Q: The insulation bricks of 0.3 m, and then buildind bricks of 0.2 m were applied to the firebrick of…

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Q: The thermal conductivity of a 2-mm-thick layer of skin is 1.5 J/s m.K. The temperature at the inside…

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Q: Chemical engineering exercise 2.1  Estimate the heat loss per m² of surface area for a furnace wall,…

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Q: 7-Air, at 100 °C, flows through a thin-walled steel tube with an inside diameter 25 mm. The wall…

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Q: The aim is to reduce the thickness of the first steel wall. Between the two walls there is a…

A: Given : Height Thickness Width Expansion rate Weight of wax

Q: plane wall composed of 2 Determine local conductive resistance r (in m².K/W) of a 90 m² layers in…

A: Given that Thickness of first layer=∆x1=240 mm=0.24 m Thickness of second layer=∆x2=120 mm=0.12 m…

Q: oblem: A furnace wall is constructed of fire brick, insulating brick and common brick, h of 10 cm…

A: Given, The area of the wall, A = 50 m2 The thermal conductivity of the fire brick, k1 = 1…

Q: Q1/A steel pipe of outside diameter of (5.1 cm) is insulated with a (0.64 cm) thickness of asbestos…

A: A steel pipe with insulation layers of asbestos and fiber glass are given with following…

Q: A cylindrical liquid nitrogen tank of 25 cm inside diameter, 2.5 cm thickness and l m height having…

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Q: Given: Fin width: 90 mm Fin length: 45 mm Fin thickness: 5 mm Thermal conductivity of fin material:…

A: The heat transfer through a rectangular fin is given as follows: qfin = hPkA(To-T∞)×tanh (mL)…

Q: On the same graph paper show how the heat flow during a DSC analysis and the elastic modulus of a…

A: DSC analysis is differential scanning calorimetry analysis. It is used to measure the effect of heat…

Q: A steam pipe having inside diameter 155mm, thickness 7mm is covered with 2 layers of insulation of…

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Q: An experiment to measure the thermal conductivity of food formulations was carried out by measuring…

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Q: Given the following for a simple, cocurrent exchanger: tube outside diameter, Do = 0.75 inches tube…

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Q: QUESTION 2 A room consists of the interior surface made of wood that is 0.013 m in thickness, the…

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Q: Explain how does thermal conductivity of solid,liquid depend upon the temperatures .

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Q: The outer surfaces of the plane composite wall (A, B and C) are exposed to a fluid at 25oC and a…

A: The heat flow diagram of the system is shown below

Q: a hot furnace consisting of three layers of wall in which first layer is made up of insulation brick…

A: Heat transfer is taking place by the mode of conduction and convection as well. Conduction occurs…

Q: Q3: A 1-mm-thick copper plate (k 386 W/m C) is sandwiched between two 2-mm-thick epoxy boards (k…

A: Given data are as shown below:K = 386 W/m*c for copper plateK = 0.26 W/m*c for epoxy boardsarea =…

Q: Derive an equation for heat conduction through a composite wall consisting of three layers inner…

A: Conduction is the transfer of heat by the vibration of molecules. Convection is the heat transfer by…

Q: Given: Fin length: 45 mm Fin width: 90 mm Fin thickness: 5 mm Thermal conductivity of fin material:…

A: Given: Fin length: 45 mm Fin width: 90 mm Fin thickness: 5 mm Thermal conductivity of fin material:…

Q: In the film adjacent to the wall where a liquid is flowing is where most of the resistance to mass…

A: Considering the film adjacent to the wall, where the liquid film is flowing. Assuming simultaneous…

Q: A new concrete driveway has been cured and is subsequently being cooled by spraying 20C water on the…

A: Thermal diffusivity: In heat transfer, thermal diffusivity is defined as the thermal conductivity…

Q: Hot-surface temperature of a 12-mm thick fire brick wall is maintained at 913 R. If the average…

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Q: A thick-walled tube of stainless steel(Ks=19.0 W/m.°C)  with 2-cm inner diameter (ID) and 4-cm outer…

A: Given r1 =2/2= 1 cm r2 = 4/2=2 cm r3 = (2 + 3)/2= 2.5cm ks =19.0 W/m.°C ka =0.2 W/m.°C Interior…

Q: 1. The surface temperature of the electronic chip shown below is 75 °C and it is surrounded by…

A: Given, The surface temperature of the electronic chip, Ts = 75°C The temperature of air, Ta = 25°C…

Q: PE4 Determine local conductive resistance r (in m².K/W) of a 90 m² plane wall composed of 2 layers…

A: Given Details: Plane wall composed of 2 Layers in series. Brick: Thickness,δ1=240.0 mm , thermal…

Q: For the above left surface of the copper plate (k = 400 W/m C) the surface absorbs heat flux from…

A: Here copper plate is kept in air for heat transfer. It is given that left surface of the copper…

Q: A composite wall is made up of an external thickness of brickwork 110 mm thick inside which is a…

A: Heat transfer is the unit operation where the heat is transferred based on the temperature…

Q: A dryer is shaped like a long semicylindrical duct of diameter 1.5 m. The base of the dryer is…

A: Diameter of duct, D = 1.5 m Temperature of the bottom (base), T1 = 370 K Temperature of the top…

Q: Q1) Calculate the heat transfer rate from a single-plane glass window with an inside surface…

A: Given: Inside temperautre of glass window is Ti = 35oC The temperature at the outside of the glass…

Q: boundary conditions used in solving heat transfer

A: Heat transfer is defined as the flow of energy from higher body temperature to the lower body…

Q: An experiment to measure the thermal conductivity of food formulations was carried out by measuring…

A: Given: Temperature difference = ∆T = 40 oC            Heat transfer per unit area = Q/A = 4700 W/m2…

Q: A large concrete slab 1 m thick has one dimensional temperature distribution given by T =…

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

A: let  A- pin wood B- cork board C- concrete then according to question thermal conductivities kA -…

Q: Rectangular cross sectional area fin (L = 12 cm, thickness 8 mm, width w = 80 cm) is attached to a…

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Q: (iii) Derive an equation for heat conduction through a composite wall consisting of three layers…

A: The figure of a composite wall subjected to heat transfer is given below

Q: Derive an equation for heat conduction through a composite wall consisting of three layers inner…

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Convective Mass Transfer between Phases

Mass transfer means the transport or movement of mass using streams, phases, components, and so on from one location to another.