1. Engineering
  2. Chemical Engineering
  3. the alaska pipeline runs 800 miles 1280 km from the...

Question: the alaska pipeline runs 800 miles 1280 km from the...

Question details

The Alaska pipeline runs 800 miles (1280 km from the Arctic Ocean to Valdez, Alaska. The pipe itself is 48 1-D., with % (1.27 cm ) thick steel walls. It is insulated with a 4 layer of fiberglass insulation (k 0.04 W m K), and the oil is generally pumped at 145 °F in air that can be as cold as-40 °F. You may assume that the heat-transfer coefficient of the outside air is hair 24 Wm2 K-1, and that of the flowing oil is hoil- 500 Wm2 K-1. (a) Where is the resistance to heat transfer the highest? (b) Does the insulation actually hed? In cother words,is it signifcantly better han just leaving the steel pipe exposed to an extra 4 of air? (c) Compute the energy loss per foot of pipe per time due to heat transfer. Using this, compute the total energy lost by the oil over the entire pipeline
Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution