Posted by Morris Dovey on October 11, 2014, 12:27 am
On 10/10/14 7:03 PM, mike wrote:
Kinda like the LHC, eh? :-)
That’s probably the healthiest attitude for all non-participants.
Posted by Jim Wilkins on October 11, 2014, 10:40 am
Faith, hope and charity (funding) are to be encouraged from investors
(BTDT) but have no place in the lab. We would not have made useful
progress if we deceived ourselves.
Posted by Morris Dovey on October 11, 2014, 3:46 pm
On 10/11/14 5:40 AM, Jim Wilkins wrote:
Yes, we generally expect others to be like ourselves.
I’m still curious about this recommendation – in your garage-lab, with a
similarly (un)funded experiment, what liquid coolant would you use to so
capture all the heat from a 1400˚C / 2552˚F reactor for a “credible”
Here’s what the rest of us are stuck with:
Start where you are. Use what you have. Do what you can.
Posted by Jim Wilkins on October 11, 2014, 8:21 pm
Visit a Maker lab and see how sophisticated some people's home
experimenting can be. High-tech surplus is cheap but you need the
knowledge to be able to recognise the good stuff.
Molten beer can aluminum or table salt would do for coolant, IF you
make the chamber from a metal that can hold pressure at that
jet-engine-turbine temperature, or separate the heat from the
"The LS-VHTR has many attractive features, including: the ability to
work at very high temperatures (the boiling point of most molten salts
being considered are >1400 ?C); ..."
Indium melts at only 156.6C and boils way up at 2072C.
(Amazon.com product link shortened)
For a low-budget home experiment you'd likely be limited to 316L
stainless for the pressure vessel, with carbon fiber insulation inside
it and a silicon carbide reaction vessel. My 316L is scrap plumbing
from a brewery, my carbon fiber came from a vacuum furnace maker's
junk bin and foundry suppliers have silicon carbide, though I went
Carbon fiber conducts electricity so you'd need Kaowool etc around the
Kanthal electric heaters.
1400C is a little too high for inexpensive Type K thermocouples, which
top out at 1250C for long-term use, though they survive being fused
together with an acetylene torch to form the junction without scaling
I don't recall 1400C being part of the spec when you wanted a reaction
vessel built. I personally have nothing better than Titanium and
Inconel 600 in my collection anyway.
Posted by Morris Dovey on October 11, 2014, 9:31 pm
On 10/11/14 3:21 PM, Jim Wilkins wrote:
It’s still not. My interest has been in the neighborhood of 400˚C, and
in verifying that the reaction can be controlled and self-sustaining.
I have no interest in commercializing/licensing these things and have
turned down (with sincere thanks) the only offer of financial help
received ($00 from a Czech software developer).
My only interest is in having an adequate heat source to power a
no-moving-parts generator – and the plan is to publish everything needed
to produce a tiny 5-10 kW generator so that anyone anywhere will be able
to make/buy/sell/use them.
If/when I get there, I probably won’t bother with measuring the thermal
output because the only thing that’ll matter to anyone is that it’s
At the moment, it’s the generator that’s looking difficult – but that’s
only because my studies were directed elsewhere. :-)