A spherical vessel containing hot fluid at 160°C (in a chemical process) is of 0.4 m OD and is made of Titanium of 25 mm thickness. The thermal conductivity is 20 W/mK. The vessel is insulated with two layers of 5 cm thick insulations of thermal conductivities 0.06 and 0.12 W/mK. There is a contact resistance of 6 × 10–4 and 5 × 10–4 m2 °C/W between the metal and first insulation and between the insulating layers. The outside is exposed to surrounding at 30°C with a convection coefficient of 15 W/m2-K. Determine the rate of heat loss, the interface temperatures and the overall heat transfer coefficient based on the metal surface area.

Q: A composite walls are constructed from an inner brick wall with thick L1= 25 cm and k1= 0.4 W/m K, a…

A:

Q: 20-m pipe has an outside diameter of 50 mm. Pipe is insulated with a layer of asbestos, then…

A:

Q: A 1.69 m wide by 1.06 m high metal plate must be insulated to prevent contact burn injuries.  If the…

A:

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: A pipe has inside diameter of 4 cm and wall thickness of 10 mm. At the inside surface of the pipe,…

A:

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

A:

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

A:

Q: A series of bricks, whose thickness are all equal to 1.3 m, are arrange according to the figure…

A: Given question is related to heat transfer.

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: 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: ansfer coeffic ndings is 5 e heat loss

A:

Q: Calculate the thermal conductivity (in W/m-K) of a material having a heat loss of 1028 watts, inside…

A: Given: The heat loss is Q=1028 W. The inside diameter is d1=59.4 cm. The thickness is t=118.4 mm.…

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

A:

Q: Question 6 A steel pipe (k = 48 W/m-K) of a heating system carries wet steam at 120 °C. The inner…

A: Given: The conductivity of steel pipe is k1=48 W/m·K. The temperature of the steam is T1=120°C. The…

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

A:

Q: Consider a machine surface that is made of a 5-mm thick alu- minum with a thermal conductivity of…

A:

Q: p4x10' Wm heat is produced in a radioactive material with a spherical shape with a diameter of R =…

A:

Q: fin made of AL metal with thermal conductivity (199 W / mK). Fin dimensions 3 cm long and 2.5 mm…

A: given data: fin metal : Al : k = 199 W/mK length; l = 0.03 m thickness; t = 2.5 mm wall temperature;…

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

A:

Q: 1. Find the rate of heat leakage for a spherical tank 2 m inside diameter and 12 mm thick with…

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: Saved Help Save & A 2-kW resistance heater wire with thermal conductivity of k= 70 W/m-K, a diameter…

A:

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: An elevator lifted eight 70 kg passenger from first floor to 2nd floor of the building with a force…

A:

Q: (2) The pipeline made of steel tube with a diameter of 150x5mm, should be covered with two layers of…

A: The mathematical formula for the thermal resistance per unit length of a hollow cylinder is given as…

Q: HEAT TRANSFER (a) Determine the thermal conductivity of an insulating material given the following…

A:

Q: A copper slab (k=387 W/m-K) is 3 mm thick. It is protected from corrosion on each side by a…

A: copper slabK=387 w/mKthickness = 3mm = 0.003 mstainless steelk=14.4 w/mKthickness = 2mm =0.002…

Q: Consider a multi-layered walls of a storage building (no windows) that is made of three layers as…

A: a) The thermal resistance diagram is given below- T1 = Inside temperature of the wallT2 =Temperature…

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: Two large stainless steel plates at temperatures of 90°C and 70°C are separated by a stainless steel…

A: The diameter of the pipe is d=2.5 cm. The length of the pipe is L=0.3 m The thermal conductivity of…

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.