This is in respect to Krivit's video.
At about 11:30 in the video Rossi holds up a hose that is attached to the output from a single Ecat. You can see steam coming out. I generously estimate the velocity of that current of steam as 1 m/s (I think it is actually about a third of that but I want to err on the side of giving Mr Rossi the benefit of the doubt).
The hose itself is marked "Parker ITR" as you can see in the video (at 10:15). And Rossi comments that it is a special type of hose for carrying steam. This makes it 1 of 3 types of hose made by the Italian subsidiary of Parker Hannifin: the Vapore 164, the Vigore 1, or the Vigore 2. On consulting the catalogue (http://www.parker.com/parkerimages/euro_hpd/CAT_4401UK.pdf) I see that it is possible to estimate the inner diameter of these hoses by their bend radii. I will do so. Krivit's video at many points (e.g., near 3:05) shows the hose as it comes horizontally out of the Ecat and then curves and drops to the floor. I generously estimate the bend radius of this curve at something like 250mm (again I am trying to err in favour of Rossi, I think that the actual minimum bend radius would be smaller if you really torqued the hose around). In the Parker catalogue all the steam-carrying hoses list 25mm as the corresponding inner diameter. As a common sense chack on this I note that in the video it looks as though Mr Rossi would be able to stick his thumb in the end of the hose and the fit would be about right. A 25mm i.d. is about right for this.
So now we have a 25mm hose carrying gas at 1 m/s. The cross sectional area of the hose is therefore [pi*0.00025m^2]/4 = 0.000196 m^2 which i shall round up (generously) to 0.0002 m^2 (i.e. 2 cm^2). A 1 m/s current in the hose means it is emitting 0.0002 m^3 of gas per second or 0.72 m^3 per hour.
Rossi claims in the video (at about 12:20) that his Ecat is vapourizing 7 Kg of water per hour. This is the same as 7 L/h of water and using an expansion factor of 1700 yields 11,900 L/h of steam. Converting to m^3 (1 L = 0.001 m^3) gives 11.9 m^3 of gas that should be escaping from the hose per hour.
So here is the contrast. According to Rossi's claims the hose he holds up should be spurting out 11.9 m^3/hr whereas according to conservative calculations it is visibly emitting about 0.72 m^3/hr. That is a disparity of about 16x and I don't see how this can be explained away by minor adjustments such as condensation in the line. The steam really should be rocketing out of the hose at a speed of at least 16 m/s, not 1 m/s. And recall that my 1 m/s estimate of gas velocity was intentionally on the high side. I really think that the true gas velocity seen coming out of the hose is about 1/3 of 1 m/s so the disparity is really about a factor of about 45.
You seem to have made out a good case here. Will have to check your calculations later, because Thanksgiving.