I assume that you are kidding Alain. I just want to point out a few important observations which others might find useful as they search for a better understanding of how this puppy works. There is so much untruth floating around that every once in a while it feels good to throw in a good bone.
Dave -----Original Message----- From: Alain Sepeda <alain.sep...@gmail.com> To: Vortex List <vortex-l@eskimo.com> Sent: Fri, May 31, 2013 3:14 pm Subject: Re: [Vo]: Interesting Information Contained in Output Temperature Curve Shape ah at last a control-command model of the reactor... beware, you publish trade secret ! I know an engineer that given that knowledge can install an automotive computer, program a matlab model, and control that the optimal way, with a hardened processor tha resist all a car can suffer. ask him a thermal engine and he make a CHP (all is on-the-shelves). talk him of thermal regulation and smart grid awareness... I guess he can... time is for engineering. 2013/5/31 David Roberson <dlrober...@aol.com> There is a wealth of information contained within the shape of the output temperature curve associated with operation of the ECAT. My spice model also demonstrates this behavior and the testers eluded to some of the important issues. It is apparent to anyone reviewing the output temperature curve that the ECAT does not behave like an ordinary resistor. The time frame over which the ECAT operates is determined to a major extent by the thermal mass of the device and that is why the earlier CATs operated for variable periods within the SSM(Self Sustaining Mode). For some reason the skeptics do not understand this issue and make a big deal out of the relatively rapid cycle period of the latest test unit. You can expect this parameter to change repeatedly as the design is modified into the future. I want to point out an important feature revealed by the output power curve. This curve can be found in the released paper on page 27 as plot 8. When positive feedback is active, the resulting temperature curve has a well defined characteristic. Most of the runs that I have done with my model are when the COP of the ECAT is usefully high. Of course COP of 6 falls into the category, while the lower COP of 3 does not hold as much interest. If you look at the falling edge of the waveform you will see an inflexion point. High temperatures above that location are generated as a result of positive feedback with a the loop gain of greater than 1. This causes a bowed shape where the temperature wants to stay elevated. At the inflexion point the gain becomes less than 1 and stable operation ensues. The driven portion of the waveform behaves in a similar manner. This is a bit less evident due to the masking from the input power. Initially the loop gain is less than 1 with a very low COP if held at the operation point. But, to get the good performance, drive is continued at a level that leads to the unstable state which is when the loop gain is 1 or more. An inflection point shows up when instability is reached. Enough for now, Dave
