Getting the power into the load is the key to making one of these devices operate efficiently. If a small amount of the magnetic flux from the drive coil intercepts the fuel pellet then the reflected resistance appearing across the resonate load is going to be quite large. The voltage swing is limited by the devices and the supply rail so it is important to get the parallel resistive component of the reflected load small enough.
I believe that a design where the drive coil is shaped like a cylinder with the fuel inside offers the best opportunity to obtain adequate drive. This seems to be where the replicators are going at the moment. A flat drive coil would not be the best due to it having plenty of leakage magnetic flux missing the fuel pellet. This then leads to a solid state device load that has a resistive component that is too large in parallel. Eddy currents are the mechanism used to absorb the power. The currents have both a resistive and inductive component which are reflected into the primary circuit. The inductive part tends to change the resonate frequency of the drive system. The resistive part becomes the load into which power is absorbed. An interesting issue is going to be the penetration depth of the magnetic flux into the fuel. All of the material above a certain region of the fuel will act like a partial shield depending upon its conductivity. The better the conductivity, the less penetration into the pellet. This should show itself as variation in the heat deposited into the fuel pellet depending upon the shape. A flat pellet would tend to be more evenly heated than a taller one. I am confident that a good design can be obtained provided the fuel conductivity does not change too greatly as it is consumed in the reactor. It is going to take some adjusting of shape and frequency in order to make a well designed system. Also, the resonate drive frequency will likely need to be modified slowly with time. Dave -----Original Message----- From: Axil Axil <[email protected]> To: vortex-l <[email protected]> Sent: Sat, Jun 13, 2015 4:05 pm Subject: Re: [Vo]:The good, the bad and the ugly Eddy currents work to produce heat in a metal or an metal oxide insolator on the micro level which still exists in a metal or oxide over it curie point. http://www.asminternational.org/documents/10192/3451119/ACFAA5C.pdf/98899692-8a69-446d-ac9a-38b8fab3a160 Hysteresis goes away beyond the Curie point, but eddy currents are still avalible for a skin effect. On Sat, Jun 13, 2015 at 3:43 PM, Jones Beene <[email protected]> wrote: Bob, There is a pretty good article on Wiki for induction cookers, but a look at the patents turns up more than meets the eye in a superficial account. The obvious part is that there is a Litz wire copper pancake coil inside the cooktop, driven by silicon to low to mid kilohertz range – 25-75 kHz. The coil has maybe 100 turns, while the bottom of the cooking pot effectively forms a single shorted turn. According to Wiki, this forms a virtual transformer which steps down the voltage and steps up the current so that the shorted current becomes heat - localized in high-resistance steel - while the driving coil stays cool. That is fairly straightforward but some designs are more efficient than others. So… there is more to the story than simply RF induction. US6956188 to GE describes an integrated capacitor, which must be resonant - and other patents have clues about special frequencies. JL Naudin and others have claimed that they can actually convert one of these devices into a gainful power source, using a Tesla bifilar pancake - but his logic is flawed and data is misinterpreted. See “Gegene” https://www.youtube.com/watch?v=-OlLRrTSvYU Anyway, one of these cooktops could probably be converted to drive a LENR experiment with efficient power … including heat plus whatever advantages can be derived from RF waves (in the sense of Dardik “superwaves”) but on paper it should only work up to the Curie point of nickel which is low. That is what is so interesting about the Ukrainian device – apparently titanium hydride works to high temperature, even though it is not ferromagnetic and no nickel is used. It would be nice to have more detail on their design. Are they burning hydrogen and titanium in air? From: Bob Cook Jones-- You are correct about induction heating. My youngest daughter recently bought a new induction heating stove. Nothing gets hot but the bottom of the pot, and the water in the pot starts boiling almost immediately. There is very fast and efficient energy transfer to the inside bottom of the pot. Its not clear what the coupling is. It must be some sort of resonance coupling IMHO. I can imagine three mechanisms: 1. Nuclear magnetic resonance, 2. Magnetic resonance from an induction coil with electrons in a conductor, 3. Spin coupling of electrons in a magnetic field in the the pot’s metal lattice, i.e., direct phonic (thermal) energy with a resonant magnetic field the driver. I bet the designers know the mechanism, but do advertise it, if is nuclear or spin coupling. The unit my daughter has an Asian company brand name. Bob Cook From: Jones Beene Sent: Saturday, June 13, 2015 10:50 AM To: [email protected] Subject: [Vo]:The good, the bad and the ugly As Peter laments, there are two extremes in the recent LENR news. Thomas Clark’s report lucidly states exactly what many of us having been saying for months about the flawed Lugano report. The good news in the provocative site: http://tet.in.ua/index.php/en/ Which is the Laboratory of Experimental Physics — also known as “TET” — in Ukraine and also in Moscow. Curiously, it combines Russian and Ukrainian efforts towards alternative energy. The curious part of this partnership goes all the way back to Chernobyl – another joint effort that resulted in catastrophe, but which result could be rectified to a large extent if this new effort is successful. The induction coil seems to offer the most promise to me – especially when the copper coil can double as the calorimeter - in the way Jack Cole has proposed. The Ukrainians seem to be doing exactly the same thing with the pictured coil which is covered in furnace cement. The problem with this approach, as Jack has documented on his blog, is capturing a larger proportion of the input energy than is normally possible with an induction setup. I believe this can be done. I have recently seen a report showing that induction cooktops, when properly designed at the best resonance level can actually apply more net energy from the grid to a cooking utensil than direct contact with the traditional resistive heating element – which is a surprise since we assume the latter is nearly 100% (it isn’t). Jones
