Stirlingengineforum.com

"better stick to conventional thermodynamics, Carnot's work, which is well proven and working wonderfully." I wasn't referring to any of Carnot's actual words, everybody knows not to interpret caloric as heat, but to what today is meant by Carnot theory as for ex in https://en.wikipedia.o...

I don't really comprehend how some people do not see how an equal amount of heat going in, and also being removed to the "sink" along with additional energy production (power out to the load), is not a violation of the conservation of energy. your mistake is to think that the two amounts ...

If I'm going to do any kind of serious work, run programs, save files etc. (other than just surfing the web), I really do need a new, or at least functional computer. yes a functional computer helps, especially if you want to program a process computer, better an old reliable desktop than a laptop ...

You like to do things more complicated than they are, download the arduino IDE https://www.arduino.cc/en/software/ for whichever operating system you already use, select arduino mega 2560 as your board and you should be set to go. You will soon need also a spreadsheet app, like libre office. The mai...

arduino is programmed in really basic C, you know much more than needed and can start immediately with a project without any preparatory work

with what you have got you could easily replicate that wonderful experiment we talked about earlier https://www.youtube.com/watch?v=dvomod6SsA0&list=PLyCh_c17A6dQ_aQXiCBhxcfYhWX2gWS41&t=1s it would teach you by far the most important theory about how stirtling engines work, please think abou...

An hard-drive read/write arm would make for a well executed, already built, efficient magnetic actuator for a displacer RW arm.jpg especially a foam, pendulum like, vertical displacer. Are you able to use arduino, or a similar processor, to drive a R/W arm with something like this https://www.adafru...

P, I assume, stands for power? So if d is displacer, is this suppose to represent the power output of the displacer? Power consumption? The equation represents the engine power balance, left side the losses, right side the gains rewritten in terms of "per cycle" energies Wd * EFFd + Eo/Q ...

The engine power balance is as follows: Pd + Po = Pg where d stands for displacer, o for oscillator and g for generator rewritten in terms of "per cycle" energies Wd * EFFd + Eo/Q = Ws EFFg where Wd is the mechanical energy expended by the displacer, EFFd is the efficiency of the electrica...

Tom, I didn't understand you want to make a generator. My interest would have been to design an engine where the the inertia to complete the S cycle would have been provided by an RC oscillator and not by a flywheel. Since dissipation in electrical devices can only be ohmic (in absence of chemical r...

"If Such a small model engine can't actually generate enough current through any kind of wire or coil to charge any kind of capacitor or influence a scrap piece of aluminum foil, then there's not much hope." What matters is power not current, in electricity one can always transform power v...

I understand we have a completely different way to approach this design, in itself a stimulating situation. What i have in mind is an engine which is based on a conventional, Amazon type, LTD , where the displacer is a foam disk which goes up and down, with only the fluid friction to overcome on the...

what I proposed on day one is to measure the power to operate the displacer, quite separately from setting up the whole engine, precisely because that's the key to size everything else and the bit which is difficult to compute

you are right, just repulsive, if it's efficient we'll find a way to get it down again at every cycle. Gravity? Two circuit one at the top and one at the bottom for the two current polarities, with diodes? You suggested a sucking solenoid but one could use permanent magnets instead which give rise t...

yes volume expansion and displacer need to be roughly in quadrature, doesn't matter which way. In a standard engine the direction of rotation is automatically consistent with the sign of the phase difference, in the electrical case it boils down to the phase of the two current, the generator and the...