00:02
Here, given, the inner radius is given, r -i means the inner radius which is 50mm.
00:10
Similarly, the outer radius r -o is given which is 55mm.
00:17
The heat transfer coefficient is given.
00:20
The inside heat transfer coefficient, h -i, is equal to 2 ,500 watts per meter square degree, similarly, the heat transfer coefficient outside is given h .o.
00:36
Is equal to 10 watt per meter square degree celsius.
00:42
Now the temperature inside is given ti is equal to 150 degrees celsius and the temperature outside is given t o is equal to 25 degrees celsius.
00:56
Also, the thermal conductivity of stainless steel is given k of stainless steel.
01:06
This is a constant value, the thermal conductivity is equal to 15 watts per meter degree celsius.
01:17
So here we need to find out the overall resistance.
01:21
The equation for overall resistance is as follows.
01:25
Overall resistance represented by capital r is equal to 1 divided by h i into a i means inside heat transfer coefficient into a i means area inside plus 1 divided by h o heat transfer coefficient outside into outside area plus 1 divided by 2 into pi into k means the thermal conductivity into l.
01:56
L means the length into l n of r o by ri...