Heat Transfer problem

  • Thread starter hsnbrg7
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Homework Statement


Hey guys. I've been cracking whole day over this question to no avail. I mean I have no idea if it's correct or wrong. And I desperately have to get it done by tomorrow and it's already midnight here so would really appreciate any sort of help I can get. Here are the doubts that I'd like to clear.

1. Should it be counter flow or parallel flow? (I chose counter flow and I can't justify why)
2. Should the water fluids flowing from the inner or outer and why? (I chose inner and I can't justify why as well)
3. Is the term for inner tube called annulus?
3. Is the final answer obtained 6 sections?

https://www.physicsforums.com/attachment.php?attachmentid=62541&d=1381082494
 

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