I've noticed that the spirits discharge from a boka I have is at a fairly high temperature, and you can see a very small amount of vapour around the top of the collection container from time to time. So, for the exercise I ran water through the boiler and a short Boka to measure the temperature of the condensed water going into the collection container.
With the water boiling away merrily and the temp gauge in th eBoka head measuring 100 deg C, the water leaving the discharge [youtube][/youtube]spout was around 80 degree C.
I put together another Boka head and incorporated a 4 inch Liebig condenser into the discharge spout so I could see what cooling effect a 4" Liebig would have on the temperature of the liquid leaving the spout.
The 4 inch Liebig on the liquid discharge cooled the liquid down 25 degree C.
While I did the exercise using water, I expect a similar reduction in the liquid temperature when distilling alcohol.
My young bloke is of the opinion that there is no need to cool the discharge liquid down, and that what is evaporating off are the more volatiles, however, as we typically do a stripping run and then do a final distillation for neutrals I don't believe we need to be too concerned about maintaining the discharge liquid temp to promote evaporation of the more volatile components. What do you blokes think?
Here are the two Boka heads I used....
The Liebig is 1/2" over 3/8" but I have ground a couple of flats down the side of the 3/8 to give more clearance for water to flow through.