Sunpulse 500: Why Low Temperature Stirling Engines: Theory | J. Kleinwächter | Auroras Eye Films

Jürgen Kleinwächter explains the background, basic theory and possibilities of low-temperature Stirling engines, in particular his Sunpulse 500 engine.
The Sunpulse engines are the core element of a decentralized autonomous energy system, a range of innovative low-temperature Stirling engines, transforming heat energy to mechanical and electrical energy. The Sunpulse 500 is the first of the range to reach the market.
This is Part 2 of a 10-part documentation of the International Sunpulse Seminar held at Tamera Peace Research Center in August 2015. See • International Sunpulse... for a summary of the seminar and links to each day's main presentations.
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[@TheRebelmanone]

I had the opposite ideal, i thought he was talking about cooling the Stirling engine's cool cylinder, keeping a nice delta T. But when i watched the other video showing the Sunpluse 500 in action, it was using heated water from evacuated tubes from sunlight to heat the heat cylinder in the Stirling engine. I thought it would work using the well water to keep the cool cylinder cool, and then that water will be warm after running directly around the Stirling cooling cylinder. Once that water is already warm now use the evacuated tubes and run it thru them and it is already half way hot, and you can heat the water to your top temp very quickly. So now you get HOT water from cooling the Stirling, and the heating cylinder will be in a evacuated tube too collecting the sunlight's heat in the cylinder directly, creating a very nice delta T. The delta T with cold well water along with amplified sunlight from parabolic mirror directing on the the heating cylinder inside an evacuated tube. NOTE; the evacuated tube will be made specifically for the size cylinder you need, it won't be those skinny long tubes that you can buy, it has to be specially made to fit the cylinder. What do you guys think, will this be as efficient or more or less efficient? Maybe we could also use that hot water and turn it into super heated steam too, using the sun and a special boiler made to use the sun.

[@TheIndustrialphreak]

those concepts are intriguing, with access issues with drinkable water popping up in many locations due to climate change I think that you could at least condense some of that water for agriculture and drinking. The big picture how bad would it be to use mass produced of scale evacuated solar tubes? why waste all that energy to make a SET that can only be use for one application? use a common mass produced tube and adjust the water volume with baffles etc. Quickest way to destroy a tube is having direct thermal shock of colder water hitting those solar boilers.

[@Nissearne12]

That's the point. When use the stirling in small scale decentrelized area it make sense. Heat and Power used in combine.

[@RaananL]

Very good and interesting presentation-Thanks for sharing!

[@stevepailet8258]

sure would be nice to get a set of plans and materials list for the stirling engine

[@mheermance]

Cogeneration and the ability to store energy as heat is a strong point in favor of his system.

[@RahulVarshney956]

54:47 an important piece of history, a red pill, for all humanity

[@AurorasEyeFilms]

🙏🏽

[@alexsmith2632]

its so cool

[@tiredironrepair]

How can an expanding universe contain vacuum yet still expand?

[@frederickbowdler1509]

Easy to critic ic engines efficiency but it has got better over last twenty years and waste geat can be used for cooking on the go and other ideas so efficiency is increased and

[@mervynshute880]

29.1157.28 he says 100% yet on his blackboard behind him, he has got about 61%, yet he has extracted heat before. yet even with this, it does not seem to me to stack up to 100%. yet if is not electricity, then it must be heated water

[@mheermance]

True, but it does use waste heat, so the total system efficiency could be higher than a PV system. Plus their demonstration system stored heated oil in tanks so it could operate around the clock.

[@esquire9445]

It took me a while to realize the woman talking in the background is translating this into German.

[@AurorasEyeFilms]

yes true, sorry for the disturbance. Now we have a better mic which helps to pic up only the main persons voice.

[@AutoNomades]

good to know.. Something also good to know is that they translate it in german (and not in portuguese .. ) , while tamera is... in Portugal... ; )

[@GregoryBoysHomestead]

I wish this guy was my neighbor!!!!

[@AurorasEyeFilms]

Haha thank 🙏🏽

[@mr.zafner8295]

The background talking makes me so angry. It's so disrespectful. Thanks for the wonderful presentation though; very effective explanation

[@AurorasEyeFilms]

Thank you 🙏🏽

[@srb1855]

Presenter confuses work with waste heat when he claims 100% efficiency for the example in question. If you take the waste heat from a heat engine and use it to drive another engine that produces some work then you can count that in the aggregate efficiency. In any case the second law already tells us that it is impossible to convert all of the heat supplied to a cyclic heat engine into useful work. This is expressed by the carnot efficiency shown at the outset of the lecture.

[@srb1855]

@Independent Thinker the speaker in the video was lecturing about Carnot efficiency. In this context it is a mistake (and at the very least misleading) to include the waste heat in the efficiency calculation - when the waste heat is simply used for hot water heating. Efficiency is a measure of how much useful work a machine can produce from a given amount of heat - period. Had the waste heat been used for an ORC then it would have been appropriate to include this in the aggregate efficiency.

[@srb1855]

@Independent Thinker I'm sorry for you that you are unable to understand this. Work and heat are different - period. If you want to start inventing your own definitions of efficiency then go right ahead. Perhaps sign up for a rudimentary course in basic thermodynamics - the kind of thing you get in high school - and then perhaps you'll start to understand. Otherwise stop posting useless comments...

[@solexxx8588]

Looks like it turned out to be a scam or too expensive to produce for a 2 kW generator. The fruitcake who built it should have shared the plans. I think he thought he would make millions getting someone else to produce it. Greed is a powerful drug.

[@josephdupont]

what about a vaccum pump (Vacuum Cleaner) and flex irrogation tubeing as a heat pump.. ?

[@SapioiT]

Ideally, you'd want a closed-loop system for the heat, eventually you could add a cold storage like you have the host storage, so the stirling engine would be coupled with a low-speed-high-torque gearbox to at least one of 5 pumps (one for ambient coldness, one for stored coldness, one for ambient heat and one for stored heat, and another one for fuel-sourced heat like from a rocket stove).

[@fedeperis]

hi! why they use oil ?

[@SapioiT]

Backup, when there's no sun for long periods of time. Still, with a hot storage area (energy from the sun) and cold storage area (cooled at night-time or with a river, or with a river at night-time), one could achieve the higher energy percentage he spoke of.

[@josephdupont]

excellent... why not use solar to produce wood gas and charcoal?

[@lesleykramer7207]

Idiot

[@alextrezvy6889]

What is the name of his friend mentioned at 55:16?

[@Jenzen91]

herman scheer

[@user-kk3cq2lc1d]

Дед молодец !!!

[@alextrezvy6889]

Why don't they start a campaign to collect money for opensourcing the blueprints?

[@SapioiT]

Because there's nothing to open-source. Everything is already open-source. There's the sterling engine, except that it's not one, but many layers of hot-cold-hot-cold and so on, so like multiple stirling engines connected to the same shaft, which powers the generator. Think of it like the space between a circle and a bigger circle, being filled with stirling engines, with the tubing for the hot and cold air on one side and the synchronized stirling engine layers on the other side, except there are two sets of engines, some going in one directions and others in the other, connected through an extra gear system (a gear to synchronize the movement, and a piston or bi-directional gear system to make the movement uniform). And that is how one would improve upon the Stirling Engine, reducing the heat loss by using the same hot plate for multiple stirling engines. Well either stacking them in a circle, or on top of eachother, still ending up with the same 2 movements which would need an extra gear to synchronize, There could also be the option for the engines to go from the center of the circle to the sides, in which case a not much changes, but it seems to me that its a lot more wasteful of energy, though I might be wrong. The energy storage is just some rammed dirt or rammed earth (the later has cement 5% or less by weight, both require some water and for the mix to be compacted) with tubing (either zig-zag or lelix, to transfer energy more efficiently) insulated as much as possible (aircrete/aerated-concrete would be a good start, but even things like a hay mix which has air gaps works well, or bricks with air channels to help with insulation), and you can build storage for both the hot and cold plate (by fan, in the day-time feeding the hot storage, in the night time feeding the cold storage), and since the storage is mostly dirt cheap, because it's dirt, and usually bigger means less money for the insulation, it's even more efficient than with one type of storage, but again, it requires more resources to build the cold storage.

[@lesleykramer7207]

@@SapioiT Wow, talk about the blind leading the blind. If English is not your first language, then you're excused, otherwise, what you wrote is nothing short of an alphabet soup.

[@GeorgeZaharia]

@@lesleykramer7207 Get off your high horse, his english isn't that bad...

[@markjohnson9402]

Because there's money to be made somewhere. Somebody needs to get in there and reverse engineer the sucker lol.

[@pakistantechnology1069]

What a great man great teacher. But the goats talking in background just wasting time.should get out!!!

[@mapcec593]

Why that hat?

[@lesleykramer7207]

why not?

[@turgor58]

Because women have nasty tendency to talk too much without being technically equipped thus making devices this man is talking about.

[@AutoNomades]

@@turgor58 Such cliché !! If women would not being equipped, this one would't being listening - understanding - and translating in german at the same time !! (it's just a pitty that the mic was not near the main speaker..)