Yes, I have fallen off the earth since Deb died. I am literally in the woods of Haynesville Maine population 88. Robert as always you are tantalizing and a man of my heart. Suppose we incorporate reversible metal hydrides and artificial muscles into this equation. When the hydride releases hydrogen it gets cold, and the cold causes the elastomer to contract which increases the pressure of the hydrogen gas due to reduced volume and the hydride absorbing the hydrogen becoming hot causing the elastomer to further increase in volume. Yes, it will work! I know, the trick is getting some polymer that is not going to leak your hydrogen like a sieve. On an aside you are so strong. You lost everything and rebuilt. I am now where you were, trying to rebuild after losing everything, including my heart. Keep up the good work.
His positivity is contagious. He's always very passionate about his finds and showing them to us. You seem very fascinating as well. Hopefully tough times may get easier for you. And only serve to make you stronger, not weak.
My brain went to a similar place with metals, and of course I immedately found there is a commercial toy sterling engine made with NiTinol wire available online for about $70 lol I just want to know how much power I can get out of my backyard once I move to the desert....
@@Johnson_Rice That could work, or maybe not quite... NiTinol has an efficiency of I think 5%. Like you're putting enough power into the wire or NiTinol thingy, to pull 100 grams, And only getting enough output as much as 5 grams of power from the NiTinol.
@@Johnson_Rice but don't worry, some simpler stirling engine designs may work quite well. Look up flat panel Stirling engine. They're awesome. And.. if I can. I'll try to make one, with simple, available materials.. cheap and easily if possible. I'm trying, I just live in a place with (relatively) limited resources.
fascinant! je crois que je vais tester ce principe du pendule thermo-cultant avec mes cristaux pyroélectriques... je ne connaissait pas cette propriété du caoutchouc! incorporer des cristaux piézoélectriques dans une matrice caoutchouc pourrait-il donner quelque chose en génération?
Robert, the biggest feature of the Stirling engine is the regenerator, which recovers much of the heat that would otherwise go out the hear sink. That's where its efficiency comes from. How would one do regeneration in a rubber engine?
Yes, the regenerator is unique to the stifling engine as opposed to hot air engine, but recovers much of the energy? Define much? Like a few percent at most. Just think about the physics, You don’t;t need complex analysis fermi solutions will get you there. A good regenerator will approach the mean between Source and sink. As I suggested if you treat the rubber engine like an artificial muscle then you can for example like with electro active polymers like 3m’s VHB 3910 tape harvest contractions, while heat expands the gas contained within, and in regards to regenerator, I suggested elsewhere using think rims of reversible metal hydrides, such that increases and decreases in pressure triggered release or absorption of hydrogen and endothermic and exothermic reactions.
@@KimberlyRPeacock >Define much? Like a few percent at most. No. The quantity of heat that the regenerator needs to regenerate is actually *several hundred percent* of the net work output of the cycle. > A good regenerator will approach the mean between Source and sink. This is not what a good regenerator does. A good regenerator sets up a temperature gradient where one end is at the temperature of the heat source, and the other is at the temperature of the heat sink, and as one charge of the gas is blown through it, on the isochoric cooling phase, the entire gradient 'swells' and heats up, picking up enough heat from the gas to cool it all the way down from the heat source temperature down to the heat sink temperature, and on the isochoric heating phase, the same gradient 'sags', giving that heat back up to the gas. It can be mathematically proven that this is a quantity of heat that exceeds the net cycle output of the engine, and for most real engines, it exceeds the net cycle output by 2-3x or more.
I saw a video that a guy built a big and powerful Sterling yeah you had to burn wood in it but why don't they make those today People's got to realize you have to burn something to get something so why not wood I'll try to find the video I saw and in the title of the short is large alpha wood fire engine part 1 And it says video filmed in Cornwall And another thing I'm sure the engine part would still work if also inside the wood box for the fire is you had pipes running with water in them to circulate through your house to heat your house too two for one they have those outdoor wood fired furnaces in America
Honestly speak what's coming to mind the big concrete fly wheel Stirling engine attached to a parabolic heater source. The rotational force turning a electric generator.
solar stirling engines can be used for powering boats or machines when there is not wind, increasing efficiency with cold water from sea or rivers, they can be also used as fridges or even frozen water desalination
We often see these things using heat sources, but cold sources shouldnt be ignored either. We had one of those sterlings nicely running on a cup of ice as a table demonstration. It really drew the crowd.
That is why integrating the hydrides works so well. When they release hydrogen its an endothermic reaction and when they absorb hydrogen its an exothermic reaction
I wonder is stirling engines can be kept running by radiative cooling panels. if they can, you could have engines that just run without any need to provide fuel or energy, since it's just using the heat in the atmosphere to run.
I think the need on a sterling engine, is a slip gear attachment and a flywheel. Like on a bicycle. The gears will still turn when the engine itself is slowing down. And the flywheel will keep the gears moving for a time, while the engine reenergizes(in between strokes).
I wonder if you could use solar on the hot side and a radiative cooling panel that points to a black panel packed tight against the earth as an absorber that re- radiates to the earth as a heatsink. It might even be reversible, at night turn the radiative cooling panel to the sky and the heated panel to the warm earth.
I've seen : A. Videos using black gargage bags stretching and contracting due to sun light as an engine 2. As a youngster, when powering my small scale("Peanut scale") model airplanes..PERELLI made the best rubber for this application AND as I recall...it was BLACK!...Hint Hint...Nudge NUDGE...say no more?
I have been wondering whether the heat from a bycicle pump could be utilised (open sousce) from suspension. All that up and down energy of suspension, to heat the cab?
Years ago they investigated recovering waste heat from suspension and it was very small. Quite often people built system to collect heat off the transmission and steering but someone else designed a areodynamic car that gets 100 to 200mpg but the engine transmission is so small there little heat to save. I do like your idea but im thinking exhaust heat somehow assisting the heating cooling sytem and then i think its gotten too complex already.
So I need a small water pump in a remote area with lots of sun. You always give me ideas. Perhaps I can heat the up side with sun and cool the down side with the water I pump up. Any one have a comment on this idea???
Reminds me of an idea I had ages ago if making a sun wheel. Basically a large wheel with many pistons arranged around the perimeter. Each one with a wheel at one end that pushes against a diverging track at the expansion side and convergent on the thermal contraction side. At the time I thought to use a bunch of heat piston thingys that open green house windows for a demonstration model. Alas no time to tinker as yet. Imagine a reverse water wheel for irrigation systems. Maybe when I retire!!
But maybe also in combination with a heat battery, this could mean high efficiency at the moment you want it.. (but a more serious stronger sterling then, perhaps then, they are not easy to make efficient as DIY)
I watched this video a few months ago and had to come back to it as I think I found a different version of this. You should check out what a Minto Wheel is, Robert. It's a wheel with sealed chambers end to end filled with propane canisters. You heat the propane up to displace it and drive the wheel. It may be faster than rubber bands. On the subject of stirlings, you should also check out a Malone Piston. It was a piston filled with water that couldn't vaporize due to the limited space, creating a lot of push, and the inventor managed to build one that was 50hp. I can't find much information as his work just kind of ended in the 1930's due to the advance of other machines.
Hi there, how about this idea, combine the pop pop drive with the sterling engine. Arrange a narrow cylinder with piston at the top, in the cylinder put a fluid close to boiling. When a bubble forms it pushes the cylinder up. The pressure drops as the cylinder goes up and the bubble expands. The bubble floats to the piston (which could have a high surface area to extract heat. As the piston compresses and cools the bubble condenses. Cycle repeats (maybe).
What would be more efficient a Stirling engine or Peltier modules at making electricity for example if you had a massive container of hot sand at steady temp. fyi I tried to work it out got too complicated very quickly totally out of my depth 😆
Did a weird sort of psychic reading when the bold face title of a you tube video future soure of energy and the word hydrogen laterally intersected the letters RGO straight down. hydrogen protons have been shown to pass through graphene with defects in it. In some processes this is used to produce energy!
Robert, I put a little generator on the end of a stove fan. I got 5v easy but could be better, as I just superglued a nut a bolt on the fan and dynamo so it's not very straight. Is this something you could look at please?
MY SON PETER DID A FIRST JOB AT A COMPANY THAT USES STERLING ENGINES TO SUPER COOL AIR. a SOUND WAVE HAS A HIGH ENERGY SIDE AND A COLD ENERGY SIDE. A HOT HEAD AND A COLD HEAD. THE "GERALD l. FORD AIRCRAFT CARRIER USES THIS METHOD TO LIQUEFY AIR.
Respectfully Robert, Your videos are fascinating and informing but,.. the audio is all over the place. Sorry for critique, hope it's accepted as constructive. Best thoughts your way! And Thank you, honestly.
i don't take it as bad mate - i appreciate the critique because in my mind a good critique is designed to help - I actually put this through audacity trying to even out the level - but I am just learning it so i appreciate i didn't do a very good lob lol - but i hope i will get better at it - cheers mate
As usual Robert you bring another piece of alternative thinking to the table, which is expanding our collective knowledge and stimulating fresh ideas. Here's a thought, what if, using the lycra strands to generate when contracting and a normal sterling engine on the expansion stroke or perhaps a Bi-metal strip to perform on the heat stroke, if I have my sums right, this would add another 25% or higher efficiency to the engine. Or am I barking up the wrong tree?
@@ThinkingandTinkering Speaking of lycra and energy, I've walked behind some lycra-clad 'good breeding stock' in my time, and the regenerative power going to waste is almost criminal.
Watching the last clip of the machine interacting with a box, and imagining a elastic heat pump cooled chamber. Put mechanical energy in, have it expand and contract in different regions, and move energy away from the container.
That's what the box was. It was someone's video experiment to see how much heat they could pull using elastic mechanical power only. It was... a couple of degrees IIRC.
I keep thinking on this idea and I wonder if there are more optimal shapes for converting heat into work than flat ribbons. I'm imagining something like a piston made from foamed rubber having a greater potential... negative displacement? It's odd to think of a piston and cylinder arrangement where the work is being converted into a reduction in volume. I'm also wondering if there's something akin to the four-cycle process that would allow part of the work of one cylinder's retraction to pull in a secondary fluid to another piston to carry the second piston's residual heat away more quickly, readying it for another cycle.
@@ThinkingandTinkering That's a pretty good idea, structurally. Now I'm off to see if there are papers on rubbers with particularly noteworthy reactions to heat.
Stirling engines occupy like 15% of my waking thoughts. It's the way it can be reversed like to do refrigeration. I want to find something else that can work like that, but for other energy types. One day... I love the carnot cycle and the refrigeration cycle, it's the foundation of my current life quest because carnot engines are prime movers of mechanical motion when run off of heat differentials, but they are prime mover of heat energy when run in reverse and reversed carnot engines are rated by COP instead of efficiency. Since my definition of "over-unity" is any prime mover with a COP > 1, heat pumps are "over-unity" devices to me. I tend to think the standard excuse that "It's okay that the heat pump does more work in relocating energy against a gradient because the energy already existed in the cold sink environment" is basically the same thing as saying "it's okay that my fancy water pump pushed 10 KJ of water uphill using 2 KJ of power because the water already existed in the lake."
I think most of us would like you to show us a functioning example of a Sterling engine powering something more useful for example a 5KW AC generator or something that would be useful in their daily lives.
I think the Norwegians use one in one of their submarines. It is so quiet it was able to sneak up on a US ship during a NATO exercise and 'sink' it. Edit: It's Sweden, not Norway
A quick stroll to the park and down the canal path... It got me how many leaves were there.... It got me thinking if you had algae troughs instead of solar.(it doubles in a day in some cases) could you get a green and cheap combined heat and power source 🤔. All that doubling surely adds up quickly in terms of bio mass
I can remember an episode of Tomorrows World where the showed a little contraption that used a piece of rubber which contracted when an electric current was passed through the rubber. It turned a little peddle arrangement. But I've not been able to find any information on it since.
i rarely comment... you certainly deserve it though.. always informative.. you are a hero to me good sir.. especially with the hot glue.. and the taking apart of the microwave.. things to learn from everything..
It seems a single length of rubber, maybe wider, with flat side at heat source and a purposely SHAPED heat shield, to allow more of the rubber to go into and out of the heat/cool areas. I see the fulcrum point could optimized. Also as the metal bar "heat shield" heats up, the cooling will be less effective, so some insulation and/or fins for air cooling is in order.
Hi they fix the leak problems by completely encapsulating the unit then extending the drive shaft though a tube in to a thick stainless steel disk where another disk with neodemion magnets were mounted the can't get over 150degs or they die .the pick up coils were located out side next to the disk and picked up the magnetic flux there . though the non magnetic stainless steel.then they got the idea to use heat diodes in the hot zone there like copper ot stainless steel tubes going up in to the zone then the shelf piston would drop down on them and completely Incase them stopping the glass expansion..you could use any medium in the tubs for heat transfer except organic it decomposes over time .a mix of sodium and potassium would work well .all the heat is out side in the lower tube section. Fire wood a camp fire would be good .no leaks .
How about twisting and knotting the rubber bands like in a toy airplane to possibly increase the effect? P.S. I promised myself i would build a solar powered refrigirator so my mind is allways thinking of ways of cooling and i can somtimes be off topic.
@@ThinkingandTinkering odd spot of a comment, though I will press on anyway; when you electrolise water into hho the expansion is close to 168,000 times the volume. Could you potentially use this expansion index to run and air motor and then burn the fuel to run a sterling engine or steam engine afterward? With the proper engineering you could effectively make something that SEEMS like perpetual motion, though the conservation of energy will show that everything does act in equivalency. Electrolysis induces pressure, pressure creates torque. Torque creates motion, motion creates generation. Combustion uses energy, combustion creates heat. Heat creates motion, motion creates generation. Byproduct = water that can then be put under Electrolysis. Cylcic system where the pressure difference in the system changes the torque and modifies the efficiency. I think I may have something there ya? Give it a think and please do share your ideas.
yes i really do like them because its energy storage thats not too complicated and the viability is to good to look pass it so easily when i can see big energy storage at my finger tips
plus my project that uses the same principles as the gravity batteries is so much more powerful with catalytic reactions i call it the gen drive i would share my plans with you over email
