Question

steam pipeline 1000 mm in diameter is insulated with 200 mm thickness insulation . it contains 200 kcal heat loss for a temperature of 180 ⁰c . at 360⁰c temperature conductivity will be ...

options
1. increased to twice
2. decreased to half
3. remained same
4.none of the above​

Answer 1

Answer:

4) none of the above

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Answer 2

GIVEN:

         Diameter of the steam pipeline is $1000mm$

           Thickness of insulation over the steam pipeline is $200mm$

                Heat loss of pipeline $200kcal$

                       Heat loss at temperature is $180$°$c$

       TO FIND:

          Conductivity will be at $360$°$c$ is

   STEAM PIPE:

                         It is used to convert steam from boiler to the  working of tubine.The steam in the pipe should not change its properties like temperature,pressure, for the maximum efficiency of components.so we use insulation  over the pipe for the temperature losses.

  INSULATION:

                      The material which is used to reduce the heat losses to the atmosphere and conductivity value will be very less.

therefore if we put insulating material over the pipe then coduct more heat from the steam than the insulating material to the intermediate surface between two insulating materials and steam loss to the atmosphere ,therefore we use superioe insulators put over it .

hence the answer is none of the above