A 2-mm diameter electric wire has a 1 mm-thick electrical insulation with a k of 0.1 W/m K. The overall heat transfer coefficient on the outside of the wire is 10 W/m^2 K. a. Determine the critical radius and discuss what will happen to the heat transfer rate if the thickness of the insulation increases to 2 mm b. Sometimes the insulation layer is not put on the wire properly so there is a small gap between them. That creates a “contact resistance” with a value of 5e^-4 (W/m2 K)^-1 Would this change the critical radius?

Q: A heat generating wall is insulated at the left surface. The right surface is exposed to air having…

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Q: Problems within the wall is T(x) = a(L- ) +b where a = 10°C/m2 and b 30°C, what is the thermal con-…

A: Given data as per questionAssumptionsSteady state condition.One dimensional conductionNo internal…

Q: Consider a thick spherical wall with insulation at both mk mk the inner and outer walls. The inner…

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Q: determine the rate of heat transfer through the wall in Watts and the temperature at the inner and…

A: Here is the solution in determining the rate of heat transfer through the wall and the temperatures…

Q: 5- A spherical tank with internal diameter of 2 m made of 2.0-cm-thick stainless steel (k=15 W/m.K)…

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Q: A heat conducting rod, 0.30 m long, is made of an aluminum section that is 0.10 m long, and a copper…

A: A heat conducting rod, 0.30 m long, is made of an aluminum section that is 0.10 m long, and a copper…

Q: Question #1 Calculate the heat losses from an insulated steel pipe (k = 50 W/m K) with an internal…

A: Given:Thermal conductivity of steel pipe, kst=50 W/m.KInternal diameter of the pipe, d1=6 cm=0.06…

Q: calculate the reduction in the heat transfer rate if a 5-cm-insulation battwith thermal conductivity…

A: As heat transfer is given by, Q=-KAdTdxQA=-0.05*dT0.05=-dT

Q: ) The wall of a refrigerator is constructed of fiberglass insulation (k =0.035 W/m °C) sandwiched…

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Q: The heat flux that is applied to the left face of a plane wall is q" = 50 W/m². The wall is of…

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Q: The internal side of a wall is kept at 100o C and its external side which is exposed to the…

A: T1=100o CT2=10o Ch=10 W/m2 oCK=1.3 W/m oCt=0.4 m

Q: An insulation (kins = 0.14 W/(m K) ) layer that is 0.002m thick surrounds a wire (diameter=0.0025m)…

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Q: A room is well insulated apart from a single-glazed window measuring 1 m2 and 4 mm thick. The…

A: To find: The convective heat transfer coefficient for outside hout. Given :  The Area is A=1 m2.…

Q: Calculate the overall heat transfer coefficient of the steel pipe based on the inner surface. The…

A: Given: Inner diameter of pipe is 12.7 cm.  Thickness of the pipe is 2.4 cm.  Inside Convection heat…

Q: A pipe having an outside diameter of 6 cm is maintained at 200°C by steam flowing inside. The pipe…

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Q: heating cube with a size of 60 x 60 cm on the inside is made of refractory brick (k=1.04 watt/(m.°c)…

A: Given Data K=1.04 W/mK X=12 cm

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.