Interesting!!!
I take it from your use of a Fairchild IGBT that you are planning to implement a conventional Kettering Ignition Design rather than a Capacitive Discharge Ignition Design. (Since an SCR, rather than an IGBT would be more appropriate in a CDI design.) Yes, there would be severe +/- KV oscillations in a Kettering design. I implemented a CDI design with a heavy diode sink to quickly "kill" any reverse voltage oscillations. On my design, the resultant LC circuit will have an overdamped harmonic frequency of 11Khz, which would drive havoc inside the reactor. Hence I implement a diode sink to quickly kill the KV oscillations. Another thing, with a Kettering design, you are pretty much limited to a low firing frequency of at most maybe 250 hz. I see that you plan to fire your sparks at 10 hz. At those levels, you will not be able to deliver enough energy into the reaction chamber to initiate any meaningful reaction. It seems you've already calculated your power input to be in the order of 5.5 watts. Seems too low to do anything with it. On my design, I am delivering 260mJ per spark or up to 211 watts at 1000 hz. And my design can be fired up to a practical rate of 10Khz. At this level, I can deliver several KW into my reactor if need be, although I do not plan to go that high. Let me know how your reactor design works out, although I think I can predict severe warping of your electrode and mesh screen. I predict this would be due to severe thermal stesses, electrostatic and electromagnetic attractive forces as well as the sheer turbulence inside that reactor. Once the mesh screen is warped, it would be closer to the other electrode. When that happens, the sparks will follow that closer path all the time. In other words, it will ionize and spark on the same location all the time. That would definitely be detrimental to your nickel nanopowders as that will cook it in short order. In my design, the reactor wall is the anode and I used a larger diameter cathode electrode to prevent warping of the electrodes. Making the reactor wall the anode should repel H+ positive ions into the middle of the reactor chamber where they can hopefully form Rydberg Matter in abundance. Good luck and apologies for biting your head off unnecessarily. Jojo ----- Original Message ----- From: Guenter Wildgruber To: vortex-l@eskimo.com Sent: Wednesday, May 23, 2012 1:50 AM Subject: Re: [Vo]:Spark plugs... thoughts and how-to? ------------------------------------------------------------------------------ Von: Jojo Jaro <jth...@hotmail.com> An: Vortex <Vortex-l@eskimo.com> Gesendet: 7:18 Montag, 21.Mai 2012 Betreff: Re: [Vo]:Spark plugs... thoughts and how-to? >>>>>>>>>>>>>>>>>>>> Guenter, I believe your "bickering" is misdirected. ... Did DGT simply make a mistake and accidentally machined an extra hole on both end plates and had to plug it with a spark plug? BTW, machining a spark plug thread is more difficult than machining an ordinary pipe fitting thread, ... Spark Plug CAN deliver High Voltages into the reactor, but NOT High Current, unless it is a highly short-lived transient current spike. >>>>>>>>>>>>>>>>>> Jojo, Sorry if this 'kidding' term comes over as 'bickering'. It was not meant to be such. Just to be funny of sorts. Well. Did not work out, it seems. You hit me, an I feel punished. OK? Actually, in my hypothetical design there are TWO electrodes. One at about 20kV (the HV) , one at 100V (the mesh), but this does not make a difference. For purely practical matters it makes sense to me to use a high-temperature, pressure-tight feedthrough for both. (I doubt whether the DGT design has anything to do with that. My efforts in reverse-engineering greek designs are very limited) Concerning current, I calculate this as follows: Max spark-energy is 300mJ for a duration of 100usec @20kV Which gives approx 7A over that interval, being equivalent to 3kOhm, absorbing all that. I estimate the spark-electrode resistance to be in the mOhm...Ohm range, so it is negligible. (see eg the STM ignition coil driver VBG15NB22T5SP-E or the Fairchild ISL9V3040D3S ecospark) Remember, the secondary (HV-coil) (AC) resistance is in the order of 5-10kOhm, considering Skin-effect and other factors. I did not make a publishable simulation right now, -which You seem to object beforehand- Am unsure whether it makes sense, above common-sense assessments, ie, that the voltage heavily oscillates between +/- kV levels, which is meaningless in conventional ignition, but NOT in a LENR environment, where it has some peculiar effects, which are not lethal, but diminish the efficiency of the whole setup considerably. I attach another pdf to clarify the 'ignition' issue. 'ideal case'. best regards Guenther
