Re: PDA1 still.
- Absolute agreement with what you wrote (excerpted below), Harry.
The condenser, if fed with 20 deg C (or cooler) water at a pressure of
1 bar or higher, will handle 2 kw with some room to spare, but product
quality will noticeably suffer, and choking will become more likely.
> I think 2000 watts for this extended column would be the upperlimit,
> if you want any sort of product quality at all. There's acorrelation
> between vapour speed, vapour volume and power input. More powermeans
> more vapour in a given timeslice. This means more speed up thecolumn
> (diameter of column doesn't change), which in turn expands the HETP.as
> Thus the point of best purity is extended upward and you need more
> height (hence the column extension Amphora sells) to keep that point
> within your rig. You also need more packing surface for separation
> the increased vapour speed reduces the time available for mingling
> with downflowing reflux.