The Chemist wrote:As to any usefulness, I'll have to have a more thorough read. But, I'll have to do that for work, anyway, now that it's come to my attention. May take several days.
I wouldn't do it or drink your product .simonmw3 wrote:Thanks to the original poster. This was very useful for me as I have been thinking of using a short length of silicone pipe between the top of the reflux column and the condenser. The reason I wanted to do this is because copper is a very good conductor of heat. A lot of still designs have cold water on copper pretty close to the top of the reflux column that we are trying to keep around 78C. This means that a lot of heat must be wasted by flowing through the copper directly into the condenser. In other words, the heat source is typically trying to boil off the alcohol but the copper is conducting the heat away to the cooling water.
My idea was to put a short length (say 10cm/4") of silicone tube just after the head of the reflux column and immediately before the condenser. Silicone conducts heat much less that copper so the alcohol vapour should be able to go from the hot top of the reflux column straight into the cool condenser via a short length of silicone without much heat being conducted through the tube. Therefore, the still should be more energy efficient. (Does that explanation make sense?)
I had been worried about the effect of the silicone tube reacting with the alcohol. However, it seems the leeching effects are relatively small and my idea only requires a small length of tube with a small surface area that the alcohol vapour would only be in contact with for a short time. (Note: when I originally considered the concept, I thought about using PVC until I read about the plasticisers in it.) Generally, I would also be against a "plastic still". However, this is just a small silicone part to try and improve the energy efficiency so that it hopefully distils faster or with less power.
What does anybody else think of this idea?
Times change info gets better . We have been working on this just haven't finished with changes . The no plastics rule was first written cause all we were getting was its ok to use cause i use it and aint dead yet.We always asked for info to back up whatever plastic was being discussed but wasn't provided any.Most posts ended up in flame wars.Hence the rule 8.We will have a materials section added to forum soon .Any material with proper researched info will be gladly admitted. tks for asking staffalice wrote:I'm a little confused. In "The rules by which we live" it states "posts about any form of plastic use will be edited, deleted or locked" but this thread is allowed to continue unabated. How come?
The rule of thumb was a good one. Some things are tried and true, and these practices should still be encouraged.
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