A hollow sphere of inner radius r1 = 30 cm and outer radius r2 =
50 cm is heated at the inner surface. The rate of heat flow out of
the sphere is 11.30 kW. The temperature at the inside and outside
surfaces of the sphere is T1 and T2. The thermal conductivity of
the material is k = 170 W(m.K)-1 . (a) Demonstrate that the rate of
heat conduction is computed by the formula: 1 2 1 2 2 1 4 T T P kr
r r r . (b) Find the difference of temperature between two
surfaces of the sphere
A Hollow Sphere Of Inner Radius R1 30 Cm And Outer Radius R2 50 Cm Is Heated At The Inner Surface The Rate Of Heat 1 (33.3 KiB) Viewed 61 times
Q5. (20 marks) A hollow sphere of inner radius n = 30 cm and outer radius r2 = 50 cm is heated at the inner surface. The rate of heat flow out of the sphere is 11.30 kW. The temperature at the inside and outside surfaces of the sphere is T and T2. The thermal conductivity of the material is k= 170 W(m.K)! T-T2 (a) Demonstrate that the rate of heat conduction is computed by the formula: P = 4 krin2 12-11 (b) Find the difference of temperature between two surfaces of the sphere.
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