On Fri, Jun 24, 2011 at 4:29 PM, Jed Rothwell <[email protected]> wrote:
> If you have a high temperature thermometer, please try this at home: > > Boil some water in a teapot so that steam emerges from the spout. Turn the > flame down, so that only a little emerges. Measure the temperature of the > steam. You will find it is ~101°C. > > Turn the flame up as high as it will go. A lot of steam will come out. > Measure the temperature again. It will still be 101°C. > Of course, because there is liquid water present. You are heating the water, not the steam. > You have to pressurize it to make it any higher. When you add more heat, > all you do is boil more water. > In a pot, yes. The ecat is not a pot. > > Of course a flow configuration is not quite the same, and there may be a > little more opportunity for the vapor to cross the hot surface and heat up > before it escapes, but with something the size of the Rossi device, at 1 > atm, you would have to make it produce many kilowatts of anomalous heat > before you get the steam up to up to 110°C or 120°C. > Well, for the flow rates used, you have to produce many kW to vaporize all the water. That's Rossi's claim. But once the water is all vaporized, you only need another watt to raise the temperature of 1 g/s steam flow by 2 C. In the Krivit demo, with about 2 g/s, 10 W more will increase the steam temperature by 10C. Now, it may not be exactly like this, but the additional heat has to get out somehow. If the steam doesn't take it, then the ecat will get hotter, and maybe lose a little more through the insulation. But if the ecat gets hotter, the water boils quicker, and exposes the dry steam to more heating element and allows it to get hotter. It's conservation of energy. If all the water is already in the form of steam, and if you put more power into the ecat, or if it produces more power, then the only way for it to come out is if the steam gets hotter. > > (I realize I got this wrong before, but not that wrong!) Yes. Completely, unequivocally, blatantly, wrong. You still don't seem to grasp it.
