Leibig cooling question

Anything cooling/condenser related.

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olddog
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Leibig cooling question

Post by olddog »

I have tried feeding the cooling water into both connections without noticing much difference, the only difference I have noticed is that when I feed the water to the connection closest to the still I get a more continuous flow with a nice spiral from the product. When I feed the leibig from the furthest connection from the still the product flow is not so clean.
Which is the correct method of feeding the cooling water and why? :? :roll:
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Hawke
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Re: Leibig cooling question

Post by Hawke »

Feed from bottom to top.(Flow going counter to vapor)
This has a couple of advantages. You are less likely to get air trapped in the cooling path. And those that have done tests on it agree that it is more efficiant.
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HookLine
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Re: Leibig cooling question

Post by HookLine »

Coolant should flow in the opposite direction to the vapour ('counterflow').

Counterflow gives a higher average temperature differential between the coolant and the vapour, and hence a more efficient use of coolant.
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eternalfrost
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Re: Leibig cooling question

Post by eternalfrost »

opposite directions:
-last thing distillate sees is the coldest water, distillate comes out cold as possible
-water shell fills from the bottom up therefore is always 100% full no matter how fast the coolant goes.

same direction:
-last thing distillate sees is the water after its already done its work, at the hottest point. distillate is hotter, requires more coolant flow.
-coolant merely trickles down through large empty water shell rather then filling the space, vastly less contact.
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