Stirling Engine Generator Homemade DIY 0.47 KW ! Part 3
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- เผยแพร่เมื่อ 27 ก.ย. 2024
- A lot of people have been asking about the power output of this engine so here it is!
To see other videos of the Mk2 stirling engine:
• Stirling Engine Mk2
If you need to contact me:
shanepomeroy@hotmail.co.uk
If you want to see the power results, skip to 9:29
We've done a bit of work on the engine over the last few months,
-Stripped engine down and cleaned out oil/was residue that had built up. We are now trialling silicon oil as the lubricant which seems to allow the leather seals to slide extremely freely. This has the added benefit of being fairly inert and able to put up with high temperatures.
-Dynamometer brake built to allow us to measure the torque output. Its a little basic / crude but should allow us to get an idea of power output
-New leather lip seals have been manufactured and fitted. The originals were tight on the pistons and jammed up (the engine oil lubricant may have caused this!) These are now 3mm thick instead of 6mm. They have been soaked in neat's-foot oil for a week and lubricated with silicon oil after installing. So far really happy with these.
-Alternator was removed because it was dragging engine down to much. We might refit this again with revised gearing that better suit it.
Overview of test
For the test we have a built a fairly hot fire using welsh anthracite coal. The crank phase angle is set to roughly 100 degrees. We took a range of torque readings between 300 to 1000 RPM.
Conclusion
Maximum recorded output was 0.63 horsepower (472 watt) at 600 RPM. This way have been slightly more if we were able to disconnect the chain drive to the second shaft (needed so we could start it!). The sweet spot for power output is between 600 to 700 RPM. This is probably not to bad when you consider how inefficient this engine is with big mechanical / heat losses.
The crank phase angle was set at 100 degrees for this test. Adjusting this may have gave us slightly more power
Next steps
Now that we know the power output we can work out what to power with it. We could refit the alternator or perhaps drive something mechanical? Not sure yet? Any good ideas?
We will be running this engine at local rallies this year so will get a better idea of the reliability of this setup. We don't plan to develop this one any further because of the restrictions of the design.
We do plan to built a 3rd engine of better / simple design that is smaller but still easily built with basic tools / materials. This will probably be a project for next winter!
Specification
Piston to tube clearance cold side 3.5mm
Piston to tube clearance hot side 3.5mm
Hot bulb clearance from inner tube 3.5mm
Cold cylinder outside tube clearance from piston 3.5mm
Hot Cylinder length from bottom of regenerator to bottom of inner tube 274mm
Cold Cylinder length from bottom of regenerator to bottom of inner tube 565mm
Pistons OD 139.7mm OD
Hot bulb heat area inside (measured from bottom of regen housing) 1640 cm2
Cold jacket cold area internal (measured from bottom of regen housing) 2830 cm2
Stroke cold piston 186mm
Stroke hot piston 204.5mm
Fire grate to bottom of hot bulb 198mm
Leather seal (bottom) from bottom of regenerator 275mm
Regenerator height (flow area) 55mm
Regenerator length 216mm
Regenerator width 100mm
Displacement 11.4 litres
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Beautiful. Never seen a Stirling engine that size running before. Thanks for putting this online!
The plan is to build another mk3 version with better power to weight but very simple (cheap!) Build. I really think its possible!
Look for "Sunpulse 500".
@@ShanePomeroy It would be nicee to see something which could reasonably be made on a desktop mill and lathe. If high thermally conductive materials were used and such it would be interesting to see how small it could get. I wonder how many modified off the shelf parts could be used to make it easier.
That’s sad you’ve never seen one bigger than that because mines at least twice as big, it’s also got a Effer phosphor vestment chlamydian jokitch munia- Sorry if my English is not perfect it’s not my first language
@@ShanePomeroy i know this sounds stupid but, is it possible to make a car using stirling engine?
That’s awesome you quantified the power of the engine most people on youtube report RPMs only which doesn’t mean anything by itself.
Not bad on conversation considering a 1/2HP motor takes 0.367749KW to run...
If the system was balanced (see wobble) it would spin at least 1/3 faster... The wobble will eventually lead to mechanical failure due to the constant resonance in the unbalanced system. Great work though!
@@mcombatti yea they need to put some weights on it to balance it. You would make MOAR POWER, and extend the life of the engine!
But I got a bajillion volts!
Clever way to rig up a dynamo as well.
What i always found strange about Stirling engines is that there are a lots of small ones and really huge ones for submarines and so on but a useful engine for home use isn't available
@@DetroitFettyghost say what? It's a generator ?
@@DetroitFettyghost nothing pops up on a search of their catalogue for Stirling or the part number
@@dammitdad lol it was purely sarcasm. It doesn’t exist lol. My bad- thought I made it obvious with all the made up words I used. Farkle Switchmaker? Marquita Parallel? McGallion Watts? 🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣
@@DetroitFettyghost dude why even put energy into all that
@@ZT_Performance literally took 10 seconds with voice to text my friend
That sound is intoxicating. Record that for 2 hours and put it on TH-cam as an ASMR video. That would make any gearhead fall fast asleep and the rhythm will soothe a rowdy soul........ Beautiful machine Bro
This looks like a great start. Balancing/weighting your flywheel should give you a decent boost in speed and power. Not to mention it will reduce/eliminate the shake and noise.
They say great minds think alike. They are correct.
Yeah.
Just a bit more revision on the mounting constructions.
I spotted small train tracks going around the house, this guy intelligently didn’t forget his childhood and revisits it on occasion
I always search for big Stirling engines and can't find anything, so really take my hat off for this one. Congrats for such a nice project!
Kind words! I plan on building a more powerful, simpler, smaller version. stay posted
@@ShanePomeroy my dream is build one powerful enough to move a vehicle and build a bike or car. Maybe one day I'll get there. Until then, I wanna see your next project :)
The reason you can't find big Sterling engines is because they don't exist.
Stirling engines work on relatively small temperature differences. Which makes the engines large and very expensive for the power they produce and heat they need to operate. They are most suited to use waste heat
@@davem5333 Sure, I agree. Even though I would like to make a big one for a vehicle just for the challenge and because I think it's cool, but it would surely be inefficient in comparison to other types of engine or electric motors.
@@davem5333wrong, NASA has made several trucks that ran on Stirling engines, and some older submarines used them as part of the propulsion system
What an awesome contraption. I love the actual cup used for water. Coming back later to find out more about those tiny train tracks I see.
The train tracks are causing interest! I plan to build a stirling engine locomotive for this
Thank you for taking measurements and sharing the video and specs in the description. Very appreciated and very impressive.
Very kind words!
Thank you for this video! Your neighbors deserve compassion! ;)
Awesome work guys!!!! Great power output!! Looking forward to future tests and engine 3!!
bravo! that has to be the most vigorous large homebuilt engine ever
Great job bro,
I noticed that such an enhancements could be done on it to increase its efficiency, like using light robust pistons, isolating chamber from outside, create furnace chamber in circled shape so that heat concentrated in a more efficient way, water based cooling system.
And put a fan on the coils/car radiator, - directly driven/12v fan powered by alternator
Also using weights to balance the flywheel or fix whatever else is making the engine shake
@@samuelfellows6923 What would be better than fans driven by an alternator are fans driven by the engine itself so you skip the losses due to conversion from mechanical -> electrical -> mechanical.
@@CharlesVanNoland Good idea, there is a simple mechanics to it - couple the fan to the main shaft by a visco-clutch. It can be thermal sensitive and adjust rotation of fan based on the actual heat. Very simple and reliable device, eg Isuzu used on engines designed to operate under load while standing still.
I’m just impressed that someone has made one of these that is actually useful
Fantastic build I wish I stayed in the same street as you. You would have a free apprentice to help you. Most of the young ones would not have a clue what that engine was all about. Keep up the good work my friend
You’ve done a great job! Impressive build sir. I hope your quite proud of it.
Certainly the largest Stirling engine I've seen. Well done, lads.
Bet the neighbours are pleased to hear you running it.
That is the number 1 comment from people! So much so I've bought a sound meter to measure the noise!
What an excellent example of an old technology that could be very useful these days.I love how you use coal too.
You're the man!!!! I was so wondering roughly how much power one could harness with this sorta thing. I'm sure some physics god could improve efficiency even further, but darn 1/2 hp is epic my man. I was only shooting for 18w and then connect it to a USB for a fire powered phone fast charger, but you far exceed what I thought was possible. Great job and thanks for sharing
This engine does have huge swept volume! I think atmospheric pressure stirling engines need re-exploring with the availability of materials these days. The best non pressurised engine I know of creates proportionally 5 times as much power as mine (it is model size), but why can't this be increased in size to create meaningful HP?
I bet your neighbors love you guys
I was thinking exactly the same thing 😂.....i think I'd prefer the guy with the drum kit.....only joking, fascinating stuff
😂😂😂😂😂, pensei o mesmo.
What a beautiful piece of engineering! Is there any possibility for you to share any blueprints? It would be a very satisfying project to build such an engine with my kids! :-)
look up James watt condensing steam engine ... and you can duplicate their engine ... if you want a sterling cycle engine ... search for sterling cycle ... and then increase the coffee mug size toy to the size VW bug and add an alternator driven off the flywheel and you now have a generator ... that will power your basic home ... (not the freezer fridge and stove the biggest power wasters in all homes)
This IS brilliant. However I think that an equal amount of petrol in a gas engine would develop more horsepower and watts generated. I am sure there are a lot of heat losses in a machine like this but the concept is brilliant and you got it to work. The strong feature of stirling engines is how little heat they can run on and how easily they move. Making them out of heavy iron takes some of that efficiency away. I suspect the length of your stroke also takes more energy than the little models use but you need this for torque. I believe in this engine, I think there would be a way to run it on a solar colector lens and water steam or just hot air. The need is to get enough energy to run an Air Conditioner to keep a room cool on a hot day and the lens might work.
Great. Keep up the good work. I think you've done a great job. Striling engines have been neglected in the past but they can be a solution to our future energy needs.
they are by nature a bit inefficent specially when compared to turbine engines.
At least 50 percent of its power goes into that "dah-dah-dah" sound I believe. :D
Looks exactly like the one my grandmother used as the motor for her Harley Davidson menstrual cycle
Punkstream fans will love this for sure!!
You can mount a fan sucking ar trough the radiator and directing this air under the firebox, so you'll have a cooling/blower with a single electric motor...
Great idea, thankyou
Wow biggest homebuilt stirling i've ever seen
Such a huge machine for only 400watts of power. No wonder the Stirling engine never really made it.
However I really would like to have a small free piston Stirling engine as an emergency power generator, those are really cool because they are small quiet and efficient.
a HUGE advantage of this type of engine is the fuel ... literally anything flammable can power it! Technically with modifications it could also be powered by ice (on a a warm day) or dry ice, liquid nitrogen etc :)
The most efficient way to generate electricity with sunlight is a Stirling engine.
@@kr6dr You could do thesam with a flame gulper engine.
the first 40 seconds was like watching an episode of the 3 stooges.
great work on the engine. looks like it was made in the 1800s.
LOL, yes my dad and I have a long history of arguing!!! I thought it was entertaining so left it in!
É um motor de respeito.
Quando vi os pistões sabia que teria muita força.
Construí um Stirling em menor escala e senti o potencial capaz de chegar um motor destes.
Parabéns e boa sorte!
Just wonderful sir! Thanks!
Im sure you have seen the UT video...
The Stirling Cycle part 1 (Stirling Cryogenics)
It succinctly describes an optimised machine which addresses many of your issues with efficiency etc. Well beyond my pay grade!
Bet it really goes down well with the locals!
Very cool! 👍👍
I would have used a spring scale instead of the digital scales.
Spring scale can be very robust, and is easy enough to calibrate by hanging some weights on it.
That's the most beautiful steam-punk machine I have ever seen
Wow, this is actually almost powerful enough to run a computer. That's amazing!
Well, as long as you aren't using a Godly Gaming Gear Video Card, it should run most desktops.
at almost 500 Watt max it will charge a whole battalion of phones . .
Very impressive.... I love it!!!! You should find the most energy efficient heater that you can. I've read that quarts and ceramic work best. I would love to see if an energy efficient heater could be supplied initially by another power source but then be able to run off of the power produced by the engine. With ALL my love NLL
That's enough to power a squirrel cage fan for a furnace. For someone who is deaf. That's really cool.
Sounds like it needs oil somewhere.. very loud. Cool test. Thanks :)
Your neighbors must adore you. Nice machine though.
Awesome love it! should add a ring of magnets around the flywheel, and a few stationary coils of wire on the frame would produce electricity with out adding belts or cogs..
That is a great idea and also adds to the simplicity of things! When I build Mk3 I'll try to incorporate that, thanks
@@ShanePomeroy it was an idea of my dad's he wanted to do it to a water wheel, but never found the place to do it!.. i think it would work well on your sterling engine!.. cram as many magnets as you can on the wheel, could even do both sides with a coil on both sides.. be an interesting experiment..
Great video. I *love* that you have a small track presumably for moving heavy things around (3.54), from the garage to the backyard etc.
Good spot! Yes, you wouldn't believe the things I've moved using it !( new wood store, 12ft oak timber beams, engines). Hoping also to build a stirling engine locomotive at some point.
Maybe it's a regular size track and they are just enormous people
Scanned your video list, definitely subscribed, I guess I’m just going to jump down the stifling rabbit hole once again! 🙂 I love this kind of stuff.
Well done lads ! When it comes to Prepping, I prefer your machine to a solar panel of equal output.
Thanks 👍, Just need to work on the power output, size, efficiency, cost for the next one. Hoping to develop something genuinely useful for off grid use that is of very simply design / cheap
Batshit crazy. I'm thinking this must be very high tolerance and your spec says 3.5mm, and it works beautifully, magnificent. Someones a good welder. I cant believe how fast that things going .
Lol, I'm as surprised as you it even works!
I love to old Tea Mug as the water Funnel, fine work all round.
First time I've seen a Stirling engine operate. Not much progress on this engine design in the 50 years since I was in college!
That's true. Most the progress has been made with the extremely high end (expensive) stuff. But then, we have technology / materials available now that they didn't have back then so who knows what could be done?
@@ShanePomeroy check out lindebeiges video
I know you will get better numbers as you refine this machine. I notice you have a lot of compression prior to being able to run before getting really hot.. might I suggest that your timing between hot and cold can influence its ability to run with less heat, and can also be used as a throttle and torque control. I know because I do this with smaller Sterling engines. Nice work and I look forward to your progress.. still waiting for you to integrate thermoelectric energy scavengers to it!
Hi Eric, I took note of your last comment about thermoelectric energy scavengers and am looking at them with next engine. I am very interested in your engine with adjustable phase timing! Any chance of a video? Once I've sorted out a sensible electric generator on mine I'd like to move the phase timing to see what effect it has on output. All the best
@@ShanePomeroy I posted in a facebook group, same group I found your videos shared called "Sterling Engines Group".
I actually no longer have that however, I was thinking about a mechanical centrifugal timing avance much like in old chevy ignition dustrubutors..
But, what I did was have the cylendars 90° orientation from the other with a flexible transfer pipe and an elongated bracket mount much like an old alternator or power steering bracket. I could get it to spin low power with a tea candle then adjust it to scream with more heat.. or make it not over rev at the same time.
back to the future Dr. Brown
The neighbors will be happy with that noise.
Now this is the kind of stuff I’ll stay up late for
How many neighbors complained?
😂. No one yet but we will see! Lol
LoL i you got good neighbors' bro........that surely wakes up the entire neighborhood.😁
Whether it's useful or not it is awesome
que crack este señor , como¡¡ camina ese stirling , ademas con un riel para sacarlo afueraa¡¡¡¡ Maestro¡¡¡¡
If I ever did this in my yard let alone on the sidewalk I'd be arrested within minutes, your very lucky. Great stuff. Cheers.
It's always good to have your da helping out.
Great...now I know how to get the hamster wheel to run without the hamster .
Wow! Beautiful machine; and it sounds amazing. Going to have to go back and watch all your videos on this!
Awesome, thank you!
A machine like this needs a cast iron frame and mounted to several cubic meters of isolated concrete slab. Like a blacksmith's auto hammer. As it is now I'd be afraid it would tear itself apart if it ran it very often. Otherwise FRICKIN SWEET!!!
Okay, very cool engines. What I find interesting is you are using a Bic style cigarette lighter when in reality you should be using either a torch lighter, the ones with the blue flames that resemble a small torch or get yourself a piezo-ignition switch propane or map-pro torch. Not very expensive either way. My piezo-ignition torch was only about CA$80 and is a Bernzomatic brand.
the happily steaming cup 'of tea' made me smile :)
I'll bet the neighbours love you
You know, this is the most popular comment! I think it does sound considerably louder on the video. Hopefully I'll solve this slight noise issue on the next engine build!
@@ShanePomeroy OK ty for replying
burning wood gas in a petrol generator is where the big free energy is
I agree with you. I'm interested in stirling engines due to their simplicity of design and quietness ( I appreciate my current engine is none of these things but I believe the next version will be!)
I could love to see something like this commercialized maybe the heated portion a woodstove and the Generator part outside of the cabin.
That's a good idea! Would be ideal for log cabins and places where mains power isn't available . Putting the cold heat exchanger outside would be a good idea!
A fantastic device, although I somehow doubt whether many of the neighbours are pleased to see (and hear) it.
My thoughts as well. hahaha
I've had no complaints but I've got a feeling they think I'm weird!
good job. punk design, pleasing neighbours..... 😉
So basically you have your personal thermal power station... Right 😂😂😂
😂 Yes, a bonfire that will power a light bulb!
The neighbours must love you 🤣🤣🤣
thats awesome, even if its wiggling like crazy trying to kill itself and sounds more like a power hammer rather than an engine xdd, its really cool you actually measured the torque and rpm
As far as I can see it is a 2-cycle alpha-Stirling engine. I guess it is running with air as cycle gas at an average pressure of ambient pressure. Advanced Stirling engines use helium as working gas in a closed system at a pressure between 10 to 100 bar. They can achieve efficiencies of 40%. Modern Stirling engines use mostly the gamma design because you don't need hot seals for working pistons. A displacer piston don't need a perfect sealing. And you can use the inner displacer piston volume to integrate the regenerator.
I guess the most system losses in your system come from the heater. The exhaust gas ist still very hot. You don't have any exhaust air heat exchanger for pre-heating of the fresh air for the coal fire. With such a heat exchanger you can recuperate up to 80% of the exhaust heat losses and increase the system efficiency by far. I guess the efficiency of your engine is maybe 2 or 3%. You can increase it to 10% by use of exhauset heat recovery.
Really enjoyed this video….kinda would’ve like an hear a little explanation and seen more overall of machine. Looks great and a whole lot of elbow grease….ya did good….very good !!
Well done! Thanks for sharing the journey. Thinking how much is wobbling... might be beneficial to make another flywheel on the shaft that counter rotates somehow that's the lowest friction. Not certain what mechanical design is the best offhand since I'm not a mechanical engineer. Though seems a counter rotating flywheel will calm the machine down. Nice work!
Fred Dibnah would have been very interested in this I am sure.
I would like to suggest that you use a small solar panel to energize the field windings on you alternator or a peltier cell on the fire box so as not to drain the battery.
The great thing with that it means you don't rely on the battery! Might not even need the battery, I'll look into it!
And it’s very quiet too! Lol. Great job guys!
I can't believe its even running sometimes!😀
Amazing, great product made in the garage, I really like this kind of expertise.
Thank you very much!
here in the early 70's with the oil crisis a guy powered his 8 tone truck on steam, it could lift the front wheels off the ground he aslo had a steam-powered car an XP falcon, its on YT somewhere a 4 corners ABC Australia .
I'll take a look!
Now connect this Stirling Engine to an alternator or generator so it does useful work.
Magnífico!! Extremamente rapido e forte!! Very nice, very stronger!!!👏👏👏👏👏👏🙌🙌😃😃😃Congratulações do Brasil!!!
Brilliant One of the Best Ever Beautiful Build Congratulations =D
superb, now we need one that people can replicate with minimal tools.
Ian, Love your thinking, stay posted for engine Mk3!
@@ShanePomeroy 50 to 100w is enough.... get a stepper motor or similar permanent magnet generator for for 18v out to charge 12v batt couple of amps. 24v scooter motors are good.
@@ShanePomeroy fluidyne sterling is easy to make...just plumbing fittings, no lathe
I like the design
Grandad needs some thermal gloves for Christmas ! Elf and safety !!
I hope someone was answering that little boy's intelligent comments, and questions.
I bet your neighbors love you haha! Very cool system, love it!
That is the number one comment about the neighbours, lol
This thing is awesome nice work
Very nice machine... Also the garden railway tracks!!
Thank you very much!
looks like something Wallace would build
I bet the neighbors love that noise 😅
I ask my self and you also if would be possible to use the heat from a pyrolysis gasifier, or if it would be more efficient. Perhaps using both the gas to power up an electric generator, and the rotations from that flywheel for another electric generator, would give a bit more efficiency.
с первого момента улыбнуло когда газом поджарил себя... И после зажег бумажку -газом) а что без этого баллона с газом ничего бы не получилось!?
Nice. Could charge my scooter in 3-4 hours with that!
Here we are in the Stone Age burning things to keep warm. Next I’ll show you how to make baskets with nothing but twigs.
You can make an unpressurised engine easily with D.I.Y. You think that is stupid?
I'm pretty sure thats the same thing Tom & Barbara Good had in their basement.
The water cooling radiator must be purged, it is of little use, especially in this position. If you want to use the Radiator in passive mode, it is better to make a large radiator from aluminum flat pipes or simply place an open barrel of water.
Impressive build , scary too !
"Stirling engines are used in submarines because they are quiet". Also Stirling engine:
Get the machine to drive an alternator and charge batteries to power a power wall and then a house.....good stuff
Charge a power wall? So you’d just need a couple dozen more of these, and I guess you’d be good. Or run it for a few days straight, and you might get one full charge