>"The self sustaining mode as demonstrated basically is just a quasi exponentially damped energy source that cools down at its >internally determined rate. It must be reheated to operational temperature. He once talked of using a duty cycle of power input >followed by zero power input to keep it alive for extended times."
Thanks Dave. I agree that the self sustaining mode follows some sort of damped curve and eventually goes below self-sustain threshold. However, I doubt this is due to a temperature tall and then reaheating can reset the reaction. If this was the case than simply varying water flow should keep the temperature high and the reaction continuous. It is hard to understand how if the ecat produces a high density of heat energy while running, letting it fall below some heat threshold and then reheating makes sense. That suggests that one "heat" is different in some way from the other "heat". On Wed, Nov 9, 2011 at 12:19 PM, David Roberson <dlrober...@aol.com> wrote: > > From: Jeff Sutton jsutton.sudb...@gmail.com > > >Hello. I have been following Rossi and the posts since the beginning > and am very fascinated. > >Rather than a fraud, I believe Rossi is on to something incrementally > better than those that came before. He has more success starting the > reaction, however I think he has little control over it once started > >To that supposition, can others comment on how they believe control > exists? (For discussion purpose, please suspend any thoughts that it is a > scam.) > > > > 1. Rossi, with all his comments, seems to suggest that it takes time > to heat up the ecat to get things started, however from the demonstrations, > they do not seem to have started in any scheduled way. He does, however, > seem to get the ecat started within a few hours give or take so that is > fantastic. > > Actually, I think Rossi has a pre defined power up sequence. Review the > data from the October 6 test and you will see method to his madness. A > guess is that his procedure is to test individual units. > > 1. He has shown it in "self-sustaining" mode but always shuts it down > after a few hours with some excuse. Why does he do that when the > blockbuster note would be "the ecat just keeps on going." I suggest this > must mean that the ecat cannot just keep on running for 6 months has he > notes; at least in self-sustaining mode. and if not in self-sustain mode, > then what does he do to "reset" the reactor? Use his heating element? > that makes no sense. Add Hydrogen? Again that makes no sense as he could > put a regulator on this and do such automatically. What resets the > operation? > > IMHO, Rossi does not want to reveal his trade secrets so easily. I agree > with you that a long term driven test would prove to all skeptics that a > large amount of excess power is generated. The self sustaining mode with > just one core active is not the type of operation that is going to be in > any final product without redesign of the device. It is optimized for 3 > cores presently, but could be modified. > > The self sustaining mode as demonstrated basically is just a > quasi exponentially damped energy source that cools down at its internally > determined rate. It must be reheated to operational temperature. He once > talked of using a duty cycle of power input followed by zero power input to > keep it alive for extended times. > > 1. He noted in the 2nd to last demo that he had a frequency generator > and it had been hidden all along, but in the last demo he notes there isn't > one. Does this suggest that he was trying something new to help in start > up or make it run longer? Or was this mis-direction? Where was this > device or wires for it in previous tests? > > I think this was a form of mis-direction. > > 1. How does he control the reaction? His only control seems to be the > heating element and the flow of water over the reactor. But in all > experiments, until quenching, the water flow seemed to be constant. And > one generating "substantial" heat, clearly controlling the reaction with a > heating element very unlikely. Is control simply due to the pre-start > conditions (the amount of hydrogen, nickel, geometry) and it runs "out of > control" for a few hours? > > I think that Rossi actually could control the output power by modulating > the heating element and water flow. He seems to go to great effort to > prevent the device from being destroyed by thermal run away. One would > think that a judicious choice of thermal resistance from the core to the > heat sink would optimize his control. I would also expect the function of > energy output versus temperature within the core is some non linear > relationship that can be used for control as long as the energy output does > not become too large and go into thermal run away and self destruction. > > >Any advice on how the control works would be most interesting. > > Good luck with your endeavor. > > >In any event, forget all the nonsense with his lousy engineering design > and terrible business skills; few are good at all things. If Rossi has > found a way to get the reaction going and produce significant excess > energy, he has changed the world and >should be recognized for this. > > You will be fortunate if you can keep everyone focused on the science > instead of the politics. > > Dave > >
