Hi, just thought I'd update you with the progress of my baby
(8L 26mm diam). I've now installed the two heating elements (big
2.2kw for fast initial heat-up, and a little 500w for the main
boil). I've also built a coil-in-a-tube type condenser to
with the water jacket one, which in hindsight, was probably oversized.
I've only tried runs with water so far, and I don't even
thermometer yet (!) so I'm guessing at all the temps. The big
element brings the water to the boil in about 20 mins, then I switch
to the 500w. The sound of the boiling sounds fairly vigorous,
wondering if 500w is a little too much? I might put the little
element though a big dimmer. Might that the surface it's sitting
acting as a soundboard though!
The water coil in the condenser is of quite small ID (about 3mm)
and the maximum I can get through it with tap pressure is about
200ml/min. However, it seems very efficient, as there is no visible
vapour, and the cooling water exits at a very warm temperature. Must
get that thermometer!!! By contrast, the jacket condenser's
water exited at virtually the same temp as it went in, and so I would
probably have had to install a good needle valve to keep the water
flow right down to avoid messing up the temps in the column, and also
wasting water. Will I need a needle valve for this condenser?
Next? Well, I have to get the thermometer, maybe get a dimmer,
hose up the condenser a little more professionally, insulate the
and that's about it!
Well, thanks for reading, and I'll get some pictures of it up