The author was kind enough to respond to me, and I have responded in turn. Your reply ( I assume you are from 3DFS ) doesn't materially change my response.
Here is the exchange:
That is the claim that is drawing the most fire, but it is an actual claim 3DFS makes, not a mistake, so it's worth understanding.
They are, believe it or not, aware that there are carnot-related losses in electricity generation. Their claim is that the 66% losses DOE claims under that banner are actually a combination of carnot and electricity losses -- that the lost quads DOE puts under there are actually spread out over the grid. They know they cannot eliminate carnot losses. But (they say) they can eliminate 98% of electrical losses. And they say that when all electrical losses are prevented, the actual carnot losses will be revealed as considerably smaller than DOE estimates.
Again: the claim is that carnot losses are exaggerated in the sankey diagram, not that they don't exist, not that they can be eliminated.
That claim may or may not hold up, but it's not the ridiculous claim that so many people on Twitter are busy rebutting.
Hope that helps clarify!
--- And my reply below---
Thanks for the reply, but I'm not buying it (and I know you're just the messenger, so don't take this personally).
While the measuring devices are "analog" in this system, the DOE estimates for conversion losses can literally be taken from the data I indicated earlier (1675 MWt to 570MWe for my plant, or roughly 34% efficient). It's incredibly easy data to gather, and it would be really hard to exaggerate. The only place where there are electrical losses in this system (between the mechanical input from the turbine and the measuring devices on the generator output) is the electrical generator and some buswork. This measurement is before it goes out on the grid, so there is literally no way that this number can be "spread out over the grid". I can also assure you that most of the electrical losses in the generator come from the fact that it is pushing out 20,000 amps. If those I^2*R losses don't account for more than 95% of the electrical losses I would be incredulous - and there is nothing a system like theirs could do to significantly reduce those losses - certainly not by 98%. I would be really impressed if they could pull off 5%... It's not like they're turning the copper in the generator into a superconductor.
Taken from another direction, my plant has a maximum theoretical Carnot Efficiency of about 46% in the summer. Laws of thermodynamics prevent anything higher than that. That 12% difference between theoretical maximum and actual has to account for heated water being discharged constantly to maintain chemistry parameters, friction losses in piping, windage and end-tip losses in the turbine, bearing losses for the turbine and generator, imperfect heat transfer between heat exchangers, thermal losses from steam and feedwater piping, steam leaks, throttling losses, and other ideal vs real turbine losses (made much more significant due to a lack of superheating for the high pressure turbines). That is all in addition to any electrical losses.
There isn't much left to get back from the generator, and no amount of phase balancing and harmonics corrections can fix anything before the generator, especially after you consider the hundreds of tons of rotating mass that would buffer those systems from any harmonics. 3DFS might be doing something really cool, but it sure as heck isn't reducing the conversion losses (as a percentage) on the DOE graph. Then again, my entire argument assumes that the DOE graph is what it says it is. Maybe the DOE is just incompetent at gathering and compiling data. I'll hold out hope that this is merely miscommunication, but what you are describing sounds more like marketing than actual technical data.
Thanks for listening to my rant. :)