25445Re: Reflux Column Condenser Question
- Dec 4, 2007Cooling management is where there is no valve below the reflux
condenser because the opening to the product condenser side is above
the reflux condenser rather than below. It is such that one must
carefully control the flow of the reflux cooling water between 100%
condensation (hence no vapour exiting above the reflux condenser and
into the product condenser.), and 0% reflux (100% of vapour traveling
past the reflux condenser and to the product side to condense there).
Liquid management uses a type of stream splitting apparatus that
catches 100% of the reflux. The reflux condenser in this case runs
wide open knocking down all the vapour all the time. The reflux ratio
is determined by how much liquid you take from the obstructed
condensate path. Search Bokabob and Nixon/Stone.
The advantage of these two designs over vapour management is that you
can accurately collect 100% of the vapour if you desire. If it is
cooling management, simply stop the reflux condenser, and all the
vapour will pass right by. If it is liquid management, just open the
stream splitting valve all the way. Why do this? Because, if you know
the maximum rate of collection, then you can easily set an accurate
Disadvantage of Cooling management is less control of the reflux
ratio, because you need an accurate metering valve with constant
pressure water at a constant temperature. This is not a big issue in
I personally like liquid management, as you only really need one
decent condenser (and an optional small inline leibig on the stream
splitter take off powered by the waste cooling water if you wish
Search the designs, and this will all start to make more sense.
Btw Very nice Sinker.
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