Heat exchanger calculation

[Klein]

Hey I'm wondering how to do calculations for a heat exchanger. (Liebig)
I'd love to learn how to do them myself (I like doing math)

I'm looking at making a heat exchanger heated by water at about 99C and and would be heating a ~10% wash.

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Water temperature: 99c
Water flow rate: 131ml/min
Wash input temperature: ~ 15c
Wash alcohol content: ~ 10% ABV
Wash flow rate 160ml/min
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Liebig heat exchanger 3/4" over 1/2" with the wash inside the 1/2"
I'd like to figure out
Roughly what the wash temp would be if I used a 36" vs a 72" heat exchanger.

Thanks for the help!!


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[shadylane]

Sounds like you want to make a wash preheater

[Klein]

Sounds like you want to make a wash preheater

That's the plan

[Badmotivator]

Sorry I don't have the math you need. If you find it, post a link? It'd be fun to see.

If I were making a wash-preheating heat exchanger, I would do a counterflow coil. It'd be pretty inexpensive, use standard widely available materials and parts, and with a long enough coil you can be certain that the wash exit temp will equal the water input temp at any rate you like.

[shadylane]

Sounds like you want to make a wash preheater

That's the plan

Figure out how to use gravity and rising vapor to getter done.
Search "wine preheater"