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Solar water heating tubes.

  1. Mar 2, 2007 #1
    Is there anyone out there that can help me answer a question I have related to solar heating of water.

    - There is a 1" diameter x 4' long glass tube filled with water having an input temperature of 250F.

    - There is a 2" diameter tube surrounding it, 4' long, filled with water coming from the opposite direction at a temperature of 40F.

    - The Flow rate is 1 gal/min.

    - I have 100 gal tank.

    How long before the water reaches 80F?

    For the sake of simplicity lets assume the sun shinning 24 hours a day.

    Any help answering this question would be greatly appreciated.
     
  2. jcsd
  3. Mar 2, 2007 #2
    have you tried some kind of solution?
     
  4. Mar 2, 2007 #3
    A solution is what I am looking for.

    As it has been a while since I am out of engineering school, and have no ready access to the calculations, I was hoping for a little help.
     
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