Solar water heating tubes.

  • Thread starter Solar
  • Start date
  • #1
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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.
 

Answers and Replies

  • #2
150
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have you tried some kind of solution?
 
  • #3
2
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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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