A hollow cylinder 6 cm internal diameter and 12 cm outer diameter has a heat generation rate of 5 × 106 W/m3. The inner surface is maintained at 380°C and the outer surface at 360°C. The conductivity of the material is 30 W/mK. Determine (a) The location and value of the maximum temperature. (b) The fraction heat generated going to the inner surface.

Q: Heat is generated in a 2.0-cm-square copper rod at the rate of 30 MW/m³. The rod is exposed to a…

A: Given data: a=2.0 cmQ˙=30 MW/m3T∞=25°Ch=5 kW/m2 Need to determine the surface temperature of the…

Q: 2. Compare the heat loss from insulated and uninsulated copper pipe (k-400 W/m K) under the…

A: Given:The thermal conductivity of the copper is The pipe internal diameter isThe pipe outside…

Q: 3-152 Consider a 25-m-long thick-walled concrete duct (k = 0.75 W/m-K) of square cross section. The…

A:

Q: A perfectly insulated aluminium bar (k = 297 W/m K) of diameter 20 cm and length 0.1 m connects a…

A: Thermal conductivity of aluminium bar, k=297 W/m.K Diameter of the bar, d=20 cm = 0.2 m Length of…

Q: Consider a large 10-cm-thick ceramic plate (k = 5,1 W/m°C) in which heat is generated uniformly at a…

A: Given: Thickness of the plate,t = 10cm External temperature, To = 350C Heat transfer coefficient, h=…

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: In an orbiting space station, an electronic package is housed in a compartment having a surface area…

A: Surface area, A=1 m2 Surface emissivity, ε=1 Space temperature, To=0 K Heat generated, Q=500 W Solar…

Q: A 5 cm long rectangular fin with a cross-section of 2 mmx5 mm is being used on a heated surface.…

A:

Q: Consider a large plane wall of thickness L = 0.2 m, thermal conductivity k = 1.2 W/mK, and surface…

A: Given: L=0.2 mk=1.2 W/mKA=15 m2heat generation qg=500 W/m3at x=0, T=60oCTa=20oCh=200 W/m2K To find:…

Q: consider a large plane wall of thickness 0.21 m, thermal conductivity k=1.2 w/m-c and surface area…

A:

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

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.