Question #1 Calculate the heat losses from an insulated steel pipe (k = 50 W/m K) with an internal diameter of 6 cm, an external diameter of 8 cm, and a length of 20m. Saturated steam flows inside the pipe at 200°C (hci = 800 W/m² K). The pipe is located in a space at 10°C, and the heat transfer coefficient on its outer surface is estimated to be hco-200 W/m² K. The insulation available to reduce heat losses is 4 cm thick gypsum plaster with thermal conductivity of 0.20 W/m K. Also, calculate the temperature on the outside surface of the insulation.

Question #1 Calculate the heat losses from an insulated steel pipe (k = 50 W/m K) with an internal diameter of 6 cm, an external diameter of 8 cm, and a length of 20m. Saturated steam flows inside the pipe at 200°C (hci = 800 W/m² K). The pipe is located in a space at 10°C, and the heat transfer coefficient on its outer surface is estimated to be hco-200 W/m² K. The insulation available to reduce heat losses is 4 cm thick gypsum plaster with thermal conductivity of 0.20 W/m K. Also, calculate the temperature on the outside surface of the insulation.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Paula has worked for Brindle Corporation for 3 years. During this time, she has worked as a machine operator/cell leader in various work cells. Recently, the plant went to mandatory 12-hour shifts and plans to remain on this schedule for several months. Paula’s present work cell is manufacturing 3-inch diameter exhaust tubes that are made from stainless steel. These tubes get a hole punched in them, a flange welded on, and burrs ground off. The pipe then gets placed into a gage to check that it was made correctly. (The tubes weigh about six pounds.) Paula has been performing the welding operation. She leans into the machine and loads the part into a fixture then positions the flange. Both pieces are clamped (using hand clamps) into position and the machine is cycled by depressing two palm buttons. The gaging operation requires placing the finished part into the gage and clamping it (using hand clamps) into place. A pin is depressed to verify the position of the hole and a…
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Paula has worked for Brindle Corporation for 3 years. During this time, she has worked as a machine operator/cell leader in various work cells. Recently, the plant went to mandatory 12-hour shifts and plans to remain on this schedule for several months. Paula’s present work cell is manufacturing 3-inch diameter exhaust tubes that are made from stainless steel. These tubes get a hole punched in them, a flange welded on, and burrs ground off. The pipe then gets placed into a gage to check that it was made correctly. (The tubes weigh about six pounds.) Paula has been performing the welding operation. She leans into the machine and loads the part into a fixture then positions the flange. Both pieces are clamped (using hand clamps) into position and the machine is cycled by depressing two palm buttons. The gaging operation requires placing the finished part into the gage and clamping it (using hand clamps) into place. A pin is depressed to verify the position of the hole and a…
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