EU V1.3 dual cells are loading! [UPDATE#5 - Could a loaded Celani wire become a high temperature super conductor?]
Mathieu reports that the V2 protocol is in the loading phase now n the EU.
Ryan is preparing a blog on the calibrations for both the EU and the US apparatus that have been running through their calibrations these past weeks.
The US cells are just a few days behind.
Go check out the LIVE DATA for
Cell EU1.3A
on the shiny new viewer.
Thanks go to Scott!
UPDATE#1 - Loading success
Loading of the EU1.3A 400+L class Celani wire was a success and here is how it how it looked on the shiny new HUGnetLab data view...
UPDATE#2 - Wire changing mode?
It looks like the wire, whilst still loading, went through a bump and is potentially in an excess heat mode - you can see T-Mica and outer cell temperatures rising when ambient (listed on other cells data) is doing nothing in particular. We don't want the wire in potential excess heat mode now, we want to try and load it some more. So we are going to cool down the cell, vacuum out any water that has been created from hydrogen reduction of wire oxides and then run through a few load/cool cycles.
Check out the graph!
UPDATE#3 - Pretty wires
Mathieu just took an image of the wires as the cell cooled down because they look pretty. The blue is NiCr and the brown one is the Celani wire.
UPDATE#4 - Video of Setup
Here is Mathieu explaining the configuration of the cells.
UPDATE#5 - Could a loaded Celani wire become a high temperature super conductor?
So over the past few days, we have been cycling the Celani wire in an H2 atmosphere to load it by passively heating the cell via 35W into the NiCr wire. This pretty much causes the exact same swing between the powered on state and room temperature. As this is happening, the wire's resistance is dropping but the rate is reducing with every cycle. The same can be said for the resistance drop at room temperature, but the rate of increased loss in resistance, whilst reducing, is less than that of the high temperature rate reduction. Make any sense... though not. So here is a picture where you can intuitively see what I am talking about.
and here is a plot of the minimum resistance difference peak to trough on successive loading cycles:
The first comparative is greater due to vacuum application, H2 refresh and NiCr power increasing from 30-35W. Over the first six cycles shown in the screen capture, the peak to trough minimum resistance delta values in a power off cool down changed from 0.482 to 0.826 Ohms, a 71% change in nominal reduction in resistance from power on. More significant is the swing compared to the on resistance, which is also dropping, so the swing is over 85% higher in the sixth peak to trough.
Now everyone knows that resistance in these wires will go up and down based on temperature and we know that loading with hydrogen makes the resistance drop. What is interesting here is that it is also seemingly making the effect of the same change in temperature causing the resistance to drop faster.
Now what if a loaded wire was deliberately cooled below room temperature, with the apparent enhancement in resistance drop, could we get to a point where the wire became a high temperature (relative to absolute zero) superconductor?
Maybe we have an exciting test to add to the end of the protocol when the experiment ends?
Comments
EDIT: maybe it was mainly the decrease in active wire measuring current which caused that.
In other words, making the cell cycle between a goal maximum temperature and a goal minimum temperature in the shortest time possible. Ideally, with no "holding" time.
You may be right about the cycling. I think we can do a set of faster cycling. There may be a little time before the US team has caught up.
If you download the active wire resistance data and remove the periods where power gets switched off you get the expected curve for hydrogen absorption under constant conditions.
i.imgur.com/BADoT5p.png[
i.imgur.com/TXJjkk6.png
To be fair there are indications that on the first 2-3 cycles in the graph above this might have increased loading a tiny little bit, meaning that to make this cycling have a tangible effect you probably need to cool and/or reheat the wire faster, which you probably don't want to attempt doing at this stage.
I like your idea Mathieu of close cycling it.
This behaviour fits with the theory that I put forward during the Jan/Feb tests that the heating/cooling cycle acts as a sort of one way ratchet/valve, squeezing the monoatomic hydrogen into the lattice and forcing it to diffuse deeper.
I feel that at some point a practical limit will be reached, probably influenced significantly by the material structure of the particular nano/crystal structure of the sample.
Celani did also state, as can bee seen in one of the published MFMP videos, that just sitting in Hydrogen will crack and fracture the material. This may be positive or negative for the performance of the wire, but in that video he said he thought it was the reason for the better performance of his 700+ L wire in NI week. This is potentially because the cracks give access to areas of the nano structure bulk that would not be practically be reached by cycle loading driven diffusion.
What this work will lead to, is a deep understanding of the max diffusion depth and therefore the optimum nano structure/clust er/particle grain size. This is why the wire approach to understanding the parameters is such a good one.
Others yet are reporting that we require ionised mono atomic hydrogen to be loaded into the cells and we may find that having a periodic glow discharge or EUV/soft xray source during loading may assist getting the right reactants in the right proximity.
To pick up Ecco's point, if treated well, these wires can run for a very long time ... so we should be able to try many things.
Mathieu, I agree, we could even see the resistance start increasing but hydrogen loading would still be increasing. Unfortunately we do not know if too much can become bad. If very high loading causes mechanical swelling and numerous large cracks it could be bad. Can Celani give any guidance on loading level?
Rhot = 15.1123*(cycle^-0.0610)
Rcold = 15.5852*(cycle^-0.0454)
cycle hot cold
10 14.04 13.13
100 12.64 11.41
200 12.25 10.94
300 12.03 10.67
3000 10.84 9.27
30000000 7.13 5.29
I expect other factors come in to play long before the 30 millionth cycle. Also long before the 100th cycle.
It is a good sign, but it would also means we can keep on loading the wire even when the resistance is not showing decrease.
It would be interesting to make 2 hours symmetric cycles of heating cooling to show if that does as I say.
The initial step down in resistance with loading may be hydrogen in inter grain boundary spaces. The later loading may be into the lattice itself.
Ed Pell
I image there were some water/moisture inside the wire from the preparation and the plastic bag.
What do you think?
Yes, under any measure now though, we have probably exceeded our loading success when compared to previous experiments. And this bodes well.
If we were to reduce pressure to 1 atm or applying vacuum, active wire resistance would likely decrease even further, but in turn also probably be in closer testing conditions to those of when the R0 value from the spreadsheet was obtained.
When and how should R and R0 be measured, when used to obtain the R/R0 ratio?
quantumheat.org/.../...
R0 was 17.31 Ohms
Given that the resistance drop after cool down is getting larger, taking the last drop from the current value, we are likely to have exceeded 23% by this calculation, making this already our best loading to date - and only passively!
By temporarily reducing power to 30W you can quickly check if the wire is now performing differently than it previously did. If it's now producing excess heat, temperatures during steady state conditions at 30W should be higher. This is assuming that excess heat, once triggered, is always being generated at some level.
By the way, to improve loading without increasing input power it might be an idea to temporarily cover the cell with some sort of metallic foil / shield / heat resistant blanket like you did a few months ago. The increased temperatures (due to better IR containment) should also increase/accele rate loading.
Yes, good analysis. There is a last option, maybe it was triggered in the between of the permanent 30W to 35W cycles. We don't have calibrations for such conditions. Let's just hope it will work under nominal vacuum conditions. :)
Actually there has been no significant change in both internal and external temperatures since the experiment started:
i.imgur.com/g0BQuQH.png
So either excess heat hasn't been triggered yet, or it got triggered by the moment power was applied under hydrogen atmosphere.
BTW in the graph above you can see how loading accelerated when heater wire power got increased from 30 to 35W (and H2 got flushed, but I'm beginning to think that it was a secondary cause).
Sorry for that
RSS feed for comments to this post