A vertical furnace wall is made-up on an inner wall of firebrick 20 cm thick followed by insulating  brick 15 cm thick and an outer wall of steel 1 cm thick. The surface temperature of the wall  adjacent to the combustion chamber is 1200oC while that of the outer surface of steel is 50oC.  The thermal conductivities of the wall material in W/m-K are firebrick, 10; insulating brick, 0.26;  and steel, 45; neglecting film resistances and contact resistance of joints, determine the percent of the total maintenance due to insulating brick.

Q: 42 oC with convection heat transfer coefficient of 9.0 W/m2 K. Solar radiation incident on the…

A: given:T0=45CT∞=42C h=9w/m2kthickness l=25cm

Q: What does the lumped capacity model describe? Give an example (with a drawing) of a heat transfer…

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Q: Fish weighing 11,000 kg with a temperature of 20°C is brought to a cold storage and which shall be…

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Q: As shown in the figure, an exterior wall of a building has an average thermal conductivity of 0.32…

A: Givenk=0.32Btu/h ft  oRL=5inT1=70oFT2=?To=20oFh=5.1Btu/h ft2 Ro

Q: A mixture of chemicals is flowing in a pipe (k = 14 W/m·K, Di = 2.5 cm, Do = 3 cm, and L = 10 m).…

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Q: the temperature is low compared to a summer night, an engineering student, studying Heat Transfer…

A: This question is belongs to Thermodynamics, heat transfer.

Q: A 0.4 kg metal bar initially at 1000 K is removed from an oven and quenched by immersing it in a…

A: Given data:- Mass of metal bar=0.4 kg Initial temperature of metal bar =1000K Mass of water=10 kg…

Q: An exothermic chemical reaction takes place in a 20 cm thick slab and the energy generation rate per…

A: To Find : The heat transfer rate to the surrounding from the right hand side of the slab,Given : The…

Q: A 50-kg box of beef at 8 C having a water content of 72 percent is to be frozen to a temperature of…

A: Assumptions: The beef is at uniform temperatures at the beginning and at the end of the process.…

Q: (b) Stainless steel ball bearings (p = 8085 kg/m³ and cp= 0.480 kJ/kg°C) having a diameter of 1.22…

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Q: A building has a calculated cooling load of 410 kW. The latent portion of the load is 100 kW. The…

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Q: A welding heat source is capable of transferring 160 kJ/min to the surface of a metal part. The…

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Q: As shown in the figure below, a system consists of a copper tank whose mass is 23 kg, 4 kg of liquid…

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Q: A chilled 1.50 cm outer diameter, 1.91 m long tube condenses 40oC saturated steam coming off the…

A: The objective of the question is to calculate the rate of heat transfer in a steam power plant. The…

Q: As shown in the figure, an exterior wall of a building has an average thermal conductivity of 0.32…

A: Given:Thermal conductivity of wall, k=0.32 Btu/h.ft.°RThickness, L=5 inT1=70°FTo=30°FConvective heat…

Q: 16-29 A hollow spherical iron container with outer diame- ter 20 cm and thickness 0.2 cm is filled…

A: Given data:- The outer diameter (d2) = 20 cm                        Thickness (t) = 0.2 cm…

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.