What Is Islam? Islam is not just another religion. It is the same message preached by Moses, Jesus and Abraham. Islam literally means ‘submission to God’ and it teaches us to have a direct relationship with God. It reminds us that since God created us, no one should be worshipped except God alone. It also teaches that God is nothing like a human being or like anything that we can imagine. The concept of God is summarized in the Quran as: { “Say, He is God, the One. God, the Absolute. He does not give birth, nor was He born, and there is nothing like Him.”} (Quran 112:1-4) Becoming a Muslim is not turning your back to Jesus. Rather it’s going back to the original teachings of Jesus and obeying him
@@ahmdabdallah5811 Prove first that your allah is a true God,not: fake,bogus,counterfeit, impostor,etc...If you claimed that your allah was also Jesus Christ,then by your mouth you declared that your group was an anti christ group(2Corin.11:5)..The spirit of anti christ came from the devil,demon,satan,lucifer- so wether you admit it or not,you religious group is a demonic,satanic group- one of so many ways/roads thats going to hell(Pv.14:12)..Lord Jesus was the one and only way going to heaven,to the God the Father(John 14:6 & Acts 4:12),all other ways were 100% fake,going to hell..The Bible hell(2Peter 2:4=TARTAROS- Greek word used= means temporary prison cell),was discovered in 1983 under Siberia, Russia with depth of 17kms plus- and not in Kola peninsula which was only 12kms plus deep...The Bible heaven(Revelation 21st chap.) was photographed by American Hubble telescope in yr.1990,at the dark edge of our galaxy,its aura was yellow,coz the Bible said its streets were made of pure gold and myriad of precious crystals were used in its walls!!...
Thank you, I wanted to fully understand how these work before having a go at building one. This is the best explanation I've found on the web so far. Thank you for all the effort you put into it.
The power derived from these engines is proportional to the temperature difference between the hot cylinder and the cold cylinder, so do everything to make the hot cylinder as hot as possible and the cold cylinder as cold as possible. To do this, the engine should be built to extract as much heat as possible from the hot gas over the flame, and to cool the cold cylinder as much as possible. With the open flame, as pictured, a lot of heat energy is lost in the hot air that does not heat the cylinder but just passes by. This is true of almost all of the working models on You Tube. The overall efficiency could be improved by increasing the heat transfer to the cylinder. One of many solutions would be to put fins on the cylinder, and then shrouds around the outside of the fins. Thus more of the hot air would pass over the metal and transfer a higher percentage of the heat in the air. An addition improvement would be to duct the outcoming air through a heat exchanger to preheat the air before it enters the combustion area. A second improvement would be to improve the transfer of heat from the cold cylinder to the surrounding air by putting fins on the cylinder. An additional improvement would be a ducting system like a stack to help speed up the cool air flowing over the cylinder. For maximum heat transfer, both cylinders should be made of copper, or aluminum. the former having the higher heat conductivity and higher cost, with the latter having a slightly lower conductivity but much lower cost. The principle value of the sterling engine is that it can use fairly low temperature heat, possible waste heat from a different type of heat engine. For example, the hot cylinder could be placed in the exhaust pipe of an gasoline engine, BMW used a similar idea; they added a steam engine to a gasoline engine where that water was heated by the exhaust gas and improved the overall efficiency. Back in the 1900's sterling engines were used to drive pumps and other machines because the heat could be derived from burning firewood. I have seen some of these working. Basically, there was a firebox with the hot cylinder placed in the chimney. If it were used to pump water, some of the water could be used to cool the cold cylinder, or the cold cylinder could be placed in the pump outlet. Dave Alexander, Bachelors and Masters degrees in Mechanical Engineering from Ohio State University.
Well, it's a demonstration. Although the often these demonstrations, many craftsmen have used as working scheme for the creation of engines. Because of this the Stirling engine is perceived as a toy. And appears myth about the low efficiency of the engine. But these demonstrations are far from effective working options. And an efficient heating. Often, many people do not think about that when heated by fire, a lot of heat escapes with hot gases. After all, their temperature is not lower than the temperature of the hot parts of the engine. Therefore, to increase efficiency, necessary to heat these gases air and fuel which enter the combustor to reduce the amount of fuel.
Dave Alexander correct but I believe the term you were looking for was "surface area" on the outsides of the cylinders. Also the higher thermoconductivity material would only be beneficial for the amount of time needed to initiate operation. After enough time all materials would approach the same temperature given the same fuel source. It may be more beneficial for longer duration to use a lower thermoconductivity material
Based on thermodynamics laws, your explanations are not accurate. There is a limit to differential temperature between hot and cold sources. After this limit, no matter how high the differential temperature is, engine efficiency starts to drop.
Mr. Garvey; The way I read Dave's explanation "as hot as" & "as cold as" possible gave me an impression e.g. to make your hot source to +1,000,000 deg-C and your cold source to -270 deg-C; without considering how much energy you have to spend to get to those extreme temperatures. Sterling engines are one of the most inefficient engines (Eta = 15-30%) that were invented. After decades of research by thousands of academics, no one could make it reach Carnot Cycle efficiency. That was the reason for its extinction. Pierre Arden, PhD, PECaltech 77
Thank you Mr. Powell, I had only recently learned of the existence of the Stirling Engine while stumbling through U-tube video's. At first glance I had thought of it as just another trinket based upon the idea's of centrifugal forces of the flywheel rotating a crankshaft and manipulating a piston or pistons via connecting rods without a viable source of continuous power. Never the less I was intrigued and began to study into the concept of theory and operation of the Stirling Engine. Yet it has only been a few days since my initial introduction, I found myself in search of a basic simple understandable approach to the Stirling theory of operation. Over the past few days I have seen and read through literature and viewed illustrations that could only impress a Brain Surgeon or possibly a NASA Engineer, far beyond my current level of comprehension. Then I stumble upon your U-Tube video. All I can say is "WOW, I've got it!", It finally makes sense. Yes, after having viewed this very U-tube production of yours, I am comfortable with a very simple basic, rudimentary understanding of the Stirling concept and theory of operation. I thank you very much as I was quickly becoming frustrated as I discovered one scientific explanation after another, each one longer and deeper in depth than the last. None of which clearly demonstrating anything more than Illegible graphs and incomprehensible rhetoric. This video of yours easily explains the Stirling engine in such a way that a layman such as myself would be confident in purchasing one or to attempt to build one for display and to operate for friends and family and proudly explain how and why it works. Knowledge is power, Once again, Thank You
I have not seen a better technical video anywhere and in this case demonstrating use of the Stirling Engine. I am looking forward to what else you have. Thanks.
Like others already said, it is the best video I have seen to explain how these marvels work. All you regularly see is botched together beer cans and coat hangers, which leaves a lot not explained. I have a great understanding of how they work. Now I can move on to implementing my new knowledge and start a build of my own. Thank you very much.
Simple straightforward and extremely educational best video I have seen for a long time congratulations please keep up the good work God bless thank you
Voici une explication très didactique et claire du fonctionnement du moteur Stirling, le sujet est très bien synthétisé ! Clear explanations on the Stirling Engine working principle, the best video I have found so far about it !
These engines are fascinating ! I only discovered their existence a couple of weeks ago and wondered what kind of magic powered these littles devices. Thanks for the video demonstrating the pretty simple (and yet awesome) physics behind it :)
Yes you can get a little more RPM with the beta because of the smaller surface area vs the gamma. ( the more surface area the longer it takes to heat up).However the Gamma could output more power in a shorter time.(depends on what your gonna use it for but thats the pro's and cons :)
Very good visualization of heat and airflow and distinguishes the different types very well. Better than any versions I have seen on RUclips. However, you did not show the regenerators at all. Perhaps you could improve your video by describing regenerators at the end of the video.
Thanks, this was the explanation that helped me understand stirling engines, all the others were very confusing.p.s. I'm a big fan of alpha stirlings :D
I have to say, the gamma type is my favorite because it seems to be the most efficient as well as the easiest to implement in e.g. a canoe or water cooled setup.
My god, hats off to your animation sir, you saved me a lot of time, this video really helped me understand and remember the concept for all my life.. thanks alot.. keep it up..
Beautifully done and explained video! Thank god for computer modeling and awesome channels like these, I wasn't even aware of the ALPHA Stirling engine until now, that's very clever adding a cold cylinder!
Brilliant explanation between the alpha, beta and gamma Stirling engines. As far as the heat cycle is concerned they all operate the same but the mechanism how it is achieved varies as shown so clearly in this videos. There are other related machines as the Manson Engine and the thermoacoustic Sterling engines which are as brilliant as the ones shown in this video. Congratulations.
Brilliant illustration and explanation. The Beta and Gamma engines, having a non-tight fitting piston, presumably can be optimised by the space allowed around the displacement cylinder: it's not clear what this should be.
neat little idea: You lay the engine out so its flat like a subaru engine so the cylinders are as far apart from each other. Then you wrap the cold cyninder in copper and run it into a radiotor to keep it super cool. I winder if that would increase efficienty
By making cylinders plural you mean the alpha? If so, they need to be 90ish degrees apart to allow time for gas expandion / contraction - 180 could be too much. Agreed on a radiator (or fins plus fan driven by the flywheel).
Great video, renderings and illustrations! However, it is hard to see (at least for me) if the Alpha config. has 4 strokes - it seems that it only has 2 strokes as do the other two!
I guess what surprises me is how fast the air has to go through thermal cycling in order to make an engine run at any kind of decent speed. From other videos I've seen on RUclips, it looks like perhaps as high as 100 cycles per second which is surprising. You wouldn't think air would be able to heat and cool to any significant level at that kind of cycle rate.
Nice video, thank you. I'm interested in designing one of these using Solar to heat the hot side. I think to increase efficiency, it would help to put vacuum insulation around the hot side, use ultra black carbon nanotube to coat the hot plate with. Then for the cold side, use composites of super high thermal conducting material, with also also a evaporation unit connected to it, that you can put water, alcohol, or a blend in, to speed up the cooling down process. Everybody wants to use parabolic or Fresnel lenses as the solar concentrators, but honestly a funnel design while less efficient at concentrating the Solar energy to a point, you don't have to move it around as much to adjust for Sun shifting and it spreads the heat across the plate better, because it's more diffuse. If you're using vacuum insulation (double thick wall borosillicate glass) and ultra black/ultra light absorbing material, you don't need or do you want the crazy high temps that a parabolic or fresnel lens can produce anyways. That, and I'm curious if this could drive something like an ultra light weight scooter or the like, and neither parabolic nor fresnel could work for that. What's interesting is that at night time, theoretically, you could reverse the process and use the hot side as the cold side by radiation up to space. For the hot side that is more tricky. Maybe a cheap, light weight, chemical exothermic type reaction? And switch out the evap unit with a vacuum insulated unit to hold that heat in as long as possible.
So relly in the Gama you could do away with the power piston as it does nothing that I can seemm you have the connecting rod to the fly wheel what does the piston do?
Correct me if im wrong but i think the 2nd engine's diagram is impossible because the arms would crash into the pole they rotate on. Idk if im expalining myself but try to analyze its movements.
How do you find out the proportions needed for the crankshaft, the flywheel itself, and the length of the tube? Is there a good number to go off of, for example the tube should be as big as the flywheels diameter or three quarters the diameter and so forth? Also, how do you figure out the length that the piston will go in the tube without experimentation? (This is all in regards to the alpha stirling engine).
The alpha engine appears to be a RIDER engine. The difference is that the rider engine does not use a displacer. Because of this it can have a higher compression ratio and is easy to implement on quite a large scale. I used 1" and 1 1/4 Inch structural steel pipe as the basis for cylinders some 40 years ago.
I would like plans so I can scale them up. The video suggests they are available, but I can't find them on the website. How much are the beta and gamma plans?
+Hungry Guy The lower the gas kinematic viscosity and the higher the gas Prandtl number, the higher will be the efficiency. Refer to thermodynamics and heat transfer books for fluid properties.
on the gamma design, couldn't the power piston be replaced by a flexible diaphragm, with the outside fixed to the cylinder walls and the center affixed to the drive rod for the cam shaft? seems like it would allow a simpler airtight seal, while reducing the friction of the sliding piston.
That's actually a really good idea! Some would argue that tensioning the diaphragm would cause resistance. But I would say on reverse stroke of the diaphragm, the potential elastic tension would be released, cancelling it out.
What if we put ammonia in the cylinder and swapped out the piston head for a flexible diaphragm that can get air pressure from a hollow connection rod. so that you can control the volume it occupies. And then have complete control of the pressure of the working fluid. thus increasing its heat transfer.
What is to stop the forces from equalizing? Unless there is a variation of hot or cold at either end it will stop running because the forces will find a natural balance. Due to equal heat and cold the gasses will push against each other with respect to each others equal forces which will eventually stop the motor.
Very informative. Stirling Engines are the power source for the Swedish 'Gotland Class' Submarines, one of which was able to make multiple attack runs undetected through the defensive screen and "sink" the USS Ronald Reagan during naval excercises in 2005. The US Navy task force was completely unable to detect the Air-Independent-Propulsion HSMS 'Gotland' which utilizes silent Stirling Engine technology.
Can the hot and cold be swaped on the Gamma ? Cold on bottom (floating in the creek)and hot on top( heated by the sun through a Fresnel Lenz[ big screen TV magnifying plastic] of corce adequate flotation is necessary.
One thing I am slightly unsure off - we are looking at a closed system? If I am right wouldn't different liquids give a different performance aka what heat being available. I am trying to compare with an ORC. If as originally attempted by Stirling (Scottish priest of all things) you use normal air what is the amount of air required for a Stirling to work? As in how "loose" would the displacer have to be. B10? JS7? Love the videos - highly explanatory and ought to be a must for anyone who teaches Physics or Engineering.
Use can use more heat sensitive liquids or gases yes and also use Radioisotopic Thermalelectric Generators or Thermalphotoviolatic cells for heat generation. In fact, Because the Gamma type can work with at least a 2 degrees temp difference you could use Americium 241 which has a half life of 432 years and an output of .135 kilowatts for the fuel cells. even after a poweroutput decay over 300 years the Watt output would still be sufficent with the temp diference of the vacuum of space.
It looks to me like the gamma type and the beta type are pretty much the same, other than the fact that the beta displacer and power pistons are the same size while the gamma displacer piston is larger than the power piston. Is there any advantage or disadvantage for using one type over the other?
I'm gonna build one and i'm gonna put it in my future miata, to not only increase efficiency by maybe 20% or even more, but to make more power, i guess i'll use it likakindaova heat exchanger or smth, anyways, i want the hot coolant from the engine to pass between the hot piston walls, then pass through a radiator, from radiator to the cold side and then back in the engine. Seems like a cool idea. I wonder how the boreXstroke ratio affects the efficiency
I too wonder if these could use waste heat from vehicles to improve efficiency, if they're worth it at all. Perhaps you could even drive the alternator with one or at the very least feed some extra air back into the engine like a turbo.
Very very well explained! I had no &?%$# idea of how a Stirling could work : now it is crystal clear! Of course, the motors as illustrated are didactic : whey would not be efficient enough to be used industrially. Tighter heat transfer on the hot side, water cooling on the cool side and attention to such details would improve efficiency. But to explain how it works : these illustrations are perfect! Very good job YTEngineer!
If by "speed" you mean number of revolutions per unit of time, this isn't an issue even with slow stirling engines, because a gear ratio will allow you to achieve any number of revolutions a minute, assuming you have the torque to back it up. As for which one has most torque: I have no clue. :)
Just going off what it says, the Alpha design has the best power-to-weight ratio. Power (in the case of reciprocating machines) is the integral of torque with respect to frequency. That is, it is the total amount of torque over time that has brought the machine to this frequency. So, assuming the same weight and frequency, the Alpha design must have the best torque. Although you would use a Stirling design for efficiency, not for torque.
I think I understand now. The power piston is affected by contrast of cold air making less pressure and expansion of hot air making hot air. And the displacer mixes the two different temperatures and also carries the crankshaft down when therenis a low pressure? Am I right , I dk
even now, these simple graphics are great for demonstration, not to mention how cool it is to fin an old video like this one
What Is Islam?
Islam is not just another religion.
It is the same message preached by Moses, Jesus and Abraham.
Islam literally means ‘submission to God’ and it teaches us to have a direct relationship with God.
It reminds us that since God created us, no one should be worshipped except God alone.
It also teaches that God is nothing like a human being or like anything that we can imagine.
The concept of God is summarized in the Quran as:
{ “Say, He is God, the One. God, the Absolute. He does not give birth, nor was He born, and there is nothing like Him.”} (Quran 112:1-4)
Becoming a Muslim is not turning your back to Jesus.
Rather it’s going back to the original teachings of Jesus and obeying him
@@ahmdabdallah5811 At least post relevant comments.
2014 is not old
@@姚大头-h9y for youtube standards, it is, videos are less numerous, and harder to find if it's not from a large channel
@@ahmdabdallah5811 Prove first that your allah is a true God,not: fake,bogus,counterfeit, impostor,etc...If you claimed that your allah was also Jesus Christ,then by your mouth you declared that your group was an anti christ group(2Corin.11:5)..The spirit of anti christ came from the devil,demon,satan,lucifer- so wether you admit it or not,you religious group is a demonic,satanic group- one of so many ways/roads thats going to hell(Pv.14:12)..Lord Jesus was the one and only way going to heaven,to the God the Father(John 14:6 & Acts 4:12),all other ways were 100% fake,going to hell..The Bible hell(2Peter 2:4=TARTAROS- Greek word used= means temporary prison cell),was discovered in 1983 under Siberia, Russia with depth of 17kms plus- and not in Kola peninsula which was only 12kms plus deep...The Bible heaven(Revelation 21st chap.) was photographed by American Hubble telescope in yr.1990,at the dark edge of our galaxy,its aura was yellow,coz the Bible said its streets were made of pure gold and myriad of precious crystals were used in its walls!!...
Thank you, I wanted to fully understand how these work before having a go at building one. This is the best explanation I've found on the web so far. Thank you for all the effort you put into it.
The power derived from these engines is proportional to the temperature
difference between the hot cylinder and the cold cylinder, so do
everything to make the hot cylinder as hot as possible and the cold
cylinder as cold as possible. To do this, the engine should be built to extract as much heat as possible from the hot gas over the flame, and to cool the cold cylinder as much as possible.
With the open flame, as pictured, a lot of heat energy is lost in the hot air that does not heat the cylinder but just passes by. This is true of almost all of the working models on You Tube. The overall efficiency could be improved by increasing the heat transfer to the cylinder. One of many solutions would be to put fins on the cylinder, and then shrouds around the outside of the fins. Thus more of the hot air would pass over the metal and transfer a higher percentage of the heat in the air. An addition improvement would be to duct the outcoming air through a heat exchanger to preheat the air before it enters the combustion area.
A second improvement would be to improve the transfer of heat from the cold cylinder to the surrounding air by putting fins on the cylinder. An additional improvement would be a ducting system like a stack to help speed up the cool air flowing over the cylinder.
For maximum heat transfer, both cylinders should be made of copper, or aluminum. the former having the higher heat conductivity and higher cost, with the latter having a slightly lower conductivity but much lower cost.
The principle value of the sterling engine is that it can use fairly low temperature heat, possible waste heat from a different type of heat engine. For example, the hot cylinder could be placed in the exhaust pipe of an gasoline engine, BMW used a similar idea; they added a steam engine to a gasoline engine where that water was heated by the exhaust gas and improved the overall efficiency.
Back in the 1900's sterling engines were used to drive pumps and other machines because the heat could be derived from burning firewood. I have seen some of these working. Basically, there was a firebox with the hot cylinder placed in the chimney. If it were used to pump water, some of the water could be used to cool the cold cylinder, or the cold cylinder could be placed in the pump outlet.
Dave Alexander, Bachelors and Masters degrees in Mechanical Engineering from Ohio State University.
Well, it's a demonstration. Although the often these demonstrations, many craftsmen have used as working scheme for the creation of engines. Because of this the Stirling engine is perceived as a toy. And appears myth about the low efficiency of the engine. But these demonstrations are far from effective working options.
And an efficient heating. Often, many people do not think about that when heated by fire, a lot of heat escapes with hot gases. After all, their temperature is not lower than the temperature of the hot parts of the engine. Therefore, to increase efficiency, necessary to heat these gases air and fuel which enter the combustor to reduce the amount of fuel.
Dave Alexander correct but I believe the term you were looking for was "surface area" on the outsides of the cylinders. Also the higher thermoconductivity material would only be beneficial for the amount of time needed to initiate operation. After enough time all materials would approach the same temperature given the same fuel source. It may be more beneficial for longer duration to use a lower thermoconductivity material
Based on thermodynamics laws, your explanations are not accurate. There is a limit to differential temperature between hot and cold sources. After this limit, no matter how high the differential temperature is, engine efficiency starts to drop.
Pierre Arden that would be true without additional imputs such as heating or cooling. Nobody said it was perpetual.
Mr. Garvey;
The way I read Dave's explanation "as hot as" & "as cold as" possible gave me an impression e.g. to make your hot source to +1,000,000 deg-C and your cold source to -270 deg-C; without considering how much energy you have to spend to get to those extreme temperatures.
Sterling engines are one of the most inefficient engines (Eta = 15-30%) that were invented. After decades of research by thousands of academics, no one could make it reach Carnot Cycle efficiency. That was the reason for its extinction.
Pierre Arden, PhD, PECaltech 77
Absolutely fabulous. I never knew how these engines worked, let alone the different types. Thanks for your superb production.
the best explanation of stirling engines! thank you very much for this
The easiest to understand explanation I have come across, brilliant work, thanks.
This is an excellent video. this is probably the best video or explanation I've seen to date very well thought out an excellent presentation.
Thank you, I'm glad you liked it ☺
+Robert Powell I agree entirely.
Robert Powell v good
yes for sure. i cant fault the video....its good to see decent vids on here. good work :)
Thank you Mr. Powell, I had only recently learned of the existence of the Stirling Engine while stumbling through U-tube video's. At first glance I had thought of it as just another trinket based upon the idea's of centrifugal forces of the flywheel rotating a crankshaft and manipulating a piston or pistons via connecting rods without a viable source of continuous power. Never the less I was intrigued and began to study into the concept of theory and operation of the Stirling Engine. Yet it has only been a few days since my initial introduction, I found myself in search of a basic simple understandable approach to the Stirling theory of operation.
Over the past few days I have seen and read through literature and viewed illustrations that could only impress a Brain Surgeon or possibly a NASA Engineer, far beyond my current level of comprehension. Then I stumble upon your U-Tube video. All I can say is "WOW, I've got it!", It finally makes sense.
Yes, after having viewed this very U-tube production of yours, I am comfortable with a very simple basic, rudimentary understanding of the Stirling concept and theory of operation.
I thank you very much as I was quickly becoming frustrated as I discovered one scientific explanation after another, each one longer and deeper in depth than the last. None of which clearly demonstrating anything more than Illegible graphs and incomprehensible rhetoric.
This video of yours easily explains the Stirling engine in such a way that a layman such as myself would be confident in purchasing one or to attempt to build one for display and to operate for friends and family and proudly explain how and why it works.
Knowledge is power,
Once again, Thank You
This is the best animation+explanation I found untill now on youtube.
Beautifully made animation - clear, uncluttered and instructive! Thanks. Now I understand the principles of Stirling engines.
this is very useful! Best stirling demonstration on youtube I would dare say
Thank you for the excellent video. I think I finally understand the sterling cycle now. Great animation.
I have not seen a better technical video anywhere and in this case demonstrating use of the Stirling Engine. I am looking forward to what else you have. Thanks.
Like others already said, it is the best video I have seen to explain how these marvels work. All you regularly see is botched together beer cans and coat hangers, which leaves a lot not explained. I have a great understanding of how they work. Now I can move on to implementing my new knowledge and start a build of my own. Thank you very much.
Simple straightforward and extremely educational best video I have seen for a long time congratulations please keep up the good work God bless
thank you
Voici une explication très didactique et claire du fonctionnement du moteur Stirling, le sujet est très bien synthétisé !
Clear explanations on the Stirling Engine working principle, the best video I have found so far about it !
These engines are fascinating ! I only discovered their existence a couple of weeks ago and wondered what kind of magic powered these littles devices. Thanks for the video demonstrating the pretty simple (and yet awesome) physics behind it :)
Yes you can get a little more RPM with the beta because of the smaller surface area vs the gamma. ( the more surface area the longer it takes to heat up).However the Gamma could output more power in a shorter time.(depends on what your gonna use it for but thats the pro's and cons :)
Very good visualization of heat and airflow and distinguishes the different types very well. Better than any versions I have seen on RUclips. However, you did not show the regenerators at all. Perhaps you could improve your video by describing regenerators at the end of the video.
Very good, I showed this video for my students, very good realization. Excited, Thank you so much.
excellent video on how the 3 types of Stirling engines work, I have never heard of this engine before seeing one at an agriculture show in 2017.
0:20 just looking at the 3d model made me understand how they work big thanks to you kind sir
ruclips.net/video/-x2_E5Ueh6o/видео.html
Thanks, this was the explanation that helped me understand stirling engines, all the others were very confusing.p.s. I'm a big fan of alpha stirlings :D
Clorox Bleach Wow I never knew bleach was interested in anything other than chemistry! You learn shit everyday
you again
ruclips.net/video/-x2_E5Ueh6o/видео.html
Absolutely fantastic, my children will love this & force me to keep my promise of building an engine.
Thanks, Vin.
+solarspecialist Did you build one?
I have to say, the gamma type is my favorite because it seems to be the most efficient as well as the easiest to implement in e.g. a canoe or water cooled setup.
which one is best to implement heating a home? i can't picture... i like wood heat (rocket mass benches)so just curious your opiion, thank
My god, hats off to your animation sir, you saved me a lot of time, this video really helped me understand and remember the concept for all my life.. thanks alot.. keep it up..
Best explanatory Stirling video I have ever seen.
Hi, best description and animation of sterling engines that I have seen. Bye
This really helped me understand the concept behind the Stirling engines, thanks so much and keep up the good work.
Beautifully done and explained video!
Thank god for computer modeling and awesome channels like these, I wasn't even aware of the ALPHA Stirling engine until now, that's very clever adding a cold cylinder!
This is the easiest explanation for me to understand. Thank you.
great explanation through a beautiful animation
Brilliant! Absolutely brilliant!. Thanks for putting that together.
No probs Terry, it was worth the work that was put in :)
Is it possible to build a hot water gamma engine which can put out 10-100W of work?
Brilliant explanation between the alpha, beta and gamma Stirling engines. As far as the heat cycle is concerned they all operate the same but the mechanism how it is achieved varies as shown so clearly in this videos. There are other related machines as the Manson Engine and the thermoacoustic Sterling engines which are as brilliant as the ones shown in this video. Congratulations.
VERY nice!
My engine is a cross of BETA and GAMMA. Well done, and thanks for posting this.
GREAT educational stuff here.
Would it be possible to swap plates in the Gamma engine and to make the cold plate on the bottom an the hot plate on top???
Thank you, the best explanation I've found on the Internet
Thank you for a very informative and graphic description of the Stirling Engine.Really enjoyed it!
This is the best video i could find of how these engines work. Thanks
Brilliant illustration and explanation. The Beta and Gamma engines, having a non-tight fitting piston, presumably can be optimised by the space allowed around the displacement cylinder: it's not clear what this should be.
+zh11147 Thanks, though I don't k ow how receptive they are to requests from foreign nationals. Appreciate the tip regardless.
The British army used portable electric generators powered by Stirling engines in WWll because petrol engines could be located by the ignition system.
Very cool illustration with the music and stuff there, thank you. :)
And they're practical too. Heard that the Swedes build a nuclear sub, with the part that made the electricity being one such. Pretty slick, I thought.
thank you so helpful to see the inside of these engines!
Fantastic presentation! 😀👍
Finally an animation that show show it works
neat little idea: You lay the engine out so its flat like a subaru engine so the cylinders are as far apart from each other. Then you wrap the cold cyninder in copper and run it into a radiotor to keep it super cool. I winder if that would increase efficienty
By making cylinders plural you mean the alpha? If so, they need to be 90ish degrees apart to allow time for gas expandion / contraction - 180 could be too much. Agreed on a radiator (or fins plus fan driven by the flywheel).
Great video, renderings and illustrations! However, it is hard to see (at least for me) if the Alpha config. has 4 strokes - it seems that it only has 2 strokes as do the other two!
Great video, much better explanation than others i found. The Alpha design is really tough to understand still haha
And for those of us with a background in adibiatic engines, the alpha is the easiest to understand - the gas flows and timing are clearer.
Great video with simple and easy explaination very nice😁
Very Cool, on one side...
Yes, and hot on the other... ;)
@@pacmangraphics My grin is pure cheese. :D
Just finished thermo and I thought this was so cool! Thanks for the video!
ruclips.net/video/-x2_E5Ueh6o/видео.html
The only thing missing from this awesome presentation is the regenerator, you could have had it changing colour like the gas spheres.+1 though :)
@Craig Roop Isn't any ducting with low thermal inertia a regenerator?
Good stuff. Looked at a few other vids that did less of a job explaining. This was a solid job.
Would it be possible to swap plates in the Gamma engine and to make the cold plate on the bottom an the hot plate on top???
Well done thank you. best explanation found on the net so far.
Thank you so much for doing this. I FINALLY understand how these blasted things work !!! Exceptionally well done video.
ruclips.net/video/-x2_E5Ueh6o/видео.html
I guess what surprises me is how fast the air has to go through thermal cycling in order to make an engine run at any kind of decent speed. From other videos I've seen on RUclips, it looks like perhaps as high as 100 cycles per second which is surprising. You wouldn't think air would be able to heat and cool to any significant level at that kind of cycle rate.
Congratulations for the excellent explanation. Thank you so much for the video.
Incredible machine...as is the presentation! Well done! I learned a lot from this!
Would it be more efficient with opposing pistons instead of a crankshaft?
in the gamma configuration, are the transfer strokes happening consecutively?
Nice video, thank you. I'm interested in designing one of these using Solar to heat the hot side. I think to increase efficiency, it would help to put vacuum insulation around the hot side, use ultra black carbon nanotube to coat the hot plate with. Then for the cold side, use composites of super high thermal conducting material, with also also a evaporation unit connected to it, that you can put water, alcohol, or a blend in, to speed up the cooling down process.
Everybody wants to use parabolic or Fresnel lenses as the solar concentrators, but honestly a funnel design while less efficient at concentrating the Solar energy to a point, you don't have to move it around as much to adjust for Sun shifting and it spreads the heat across the plate better, because it's more diffuse. If you're using vacuum insulation (double thick wall borosillicate glass) and ultra black/ultra light absorbing material, you don't need or do you want the crazy high temps that a parabolic or fresnel lens can produce anyways. That, and I'm curious if this could drive something like an ultra light weight scooter or the like, and neither parabolic nor fresnel could work for that.
What's interesting is that at night time, theoretically, you could reverse the process and use the hot side as the cold side by radiation up to space. For the hot side that is more tricky. Maybe a cheap, light weight, chemical exothermic type reaction? And switch out the evap unit with a vacuum insulated unit to hold that heat in as long as possible.
I loved your Tesla bladeless turbine engine.Are you one of the few engineers who cross over into physics, and, mathematics? Great . Thank you.
Could the third type be used on a considerably hot surface like a heater to power a fan blade ? Just as a means of circulating the heat?
Very cool YT. I really enjoyed your animation of how they work. Thanks!
So relly in the Gama you could do away with the power piston as it does nothing that I can seemm you have the connecting rod to the fly wheel what does the piston do?
Brillante démonstration des trois types de moteurs stirling.
Correct me if im wrong but i think the 2nd engine's diagram is impossible because the arms would crash into the pole they rotate on. Idk if im expalining myself but try to analyze its movements.
How do you find out the proportions needed for the crankshaft, the flywheel itself, and the length of the tube? Is there a good number to go off of, for example the tube should be as big as the flywheels diameter or three quarters the diameter and so forth? Also, how do you figure out the length that the piston will go in the tube without experimentation? (This is all in regards to the alpha stirling engine).
The alpha engine appears to be a RIDER engine. The difference is that the rider engine does not use a displacer. Because of this it can have a higher compression ratio and is easy to implement on quite a large scale. I used 1" and 1 1/4 Inch structural steel pipe as the basis for cylinders some 40 years ago.
alpha engines don't have a displacer, they have 2 pistons instead.
This is the best explaination!
Excellent demonstration, thank you.
I am guessing the gamma-type is the least useful in terms of power generated per therm used?
All I have to say is the person who invented this idea is a complete genius. 'Robert Stirling'
I would like plans so I can scale them up. The video suggests they are available, but I can't find them on the website. How much are the beta and gamma plans?
Would the efficiency improve if you used a refrigerant gas like "Freon" or ammonia instead of air?
+Hungry Guy The lower the gas kinematic viscosity and the higher the gas Prandtl number, the higher will be the efficiency. Refer to thermodynamics and heat transfer books for fluid properties.
Nice presentation.
best simulation ever.
Which CAD program do you use?
Kind of like pedaling a bike? More input on a certain stroke?
If one were interested in cooling the air in a room from say 90f to 70f which sterling type would be suggested?
Definitely needed this thank you!
on the gamma design, couldn't the power piston be replaced by a flexible diaphragm, with the outside fixed to the cylinder walls and the center affixed to the drive rod for the cam shaft? seems like it would allow a simpler airtight seal, while reducing the friction of the sliding piston.
That's actually a really good idea!
Some would argue that tensioning the diaphragm would cause resistance. But I would say on reverse stroke of the diaphragm, the potential elastic tension would be released, cancelling it out.
Yes, there's people who have used balloons as power pistons
How much force can a candle make
Lbs per inch
I can't imagine them moving a drill
What if we put ammonia in the cylinder and swapped out the piston head for a flexible diaphragm that can get air pressure from a hollow connection rod. so that you can control the volume it occupies. And then have complete control of the pressure of the working fluid. thus increasing its heat transfer.
What is to stop the forces from equalizing? Unless there is a variation of hot or cold at either end it will stop running because the forces will find a natural balance. Due to equal heat and cold the gasses will push against each other with respect to each others equal forces which will eventually stop the motor.
Very informative. Stirling Engines are the power source for the Swedish 'Gotland Class' Submarines, one of which was able to make multiple attack runs undetected through the defensive screen and "sink" the USS Ronald Reagan during naval excercises in 2005. The US Navy task force was completely unable to detect the Air-Independent-Propulsion HSMS 'Gotland' which utilizes silent Stirling Engine technology.
Yes, the Stirlings are quiet. I made sure myself. ruclips.net/video/sl98DK232Pk/видео.html
Can the hot and cold be swaped on the Gamma ? Cold on bottom (floating in the creek)and hot on top( heated by the sun through a Fresnel Lenz[ big screen TV magnifying plastic] of corce adequate flotation is necessary.
There is no legal reason why that would not be allowed.
Could we try adding valve to the bottom of container + turbo for more compressed air?
awesome video 10/10. thanks for the terrific presentation.
Have you had a chance to analyze the working principles of the lamina flow engine yet? I'm still trying to figure that one out.
I can't understand the gamma, what is the little piston for?
MY questions are? Could it run little or pro kind of dynamo? Wy not put it on top o chimney and have some extra energy in winter?
In the alpha engine, why does the air-flow follow the displacer piston perfectly and seemingly ignore the power piston?
lots of information thank you so much to put something like this into that easy to comprehend thank you.
Does the cylinders of these engines are sealed?
One thing I am slightly unsure off - we are looking at a closed system?
If I am right wouldn't different liquids give a different performance aka what heat being available.
I am trying to compare with an ORC.
If as originally attempted by Stirling (Scottish priest of all things) you use normal air what is the amount of air required for a Stirling to work? As in how "loose" would the displacer have to be. B10? JS7?
Love the videos - highly explanatory and ought to be a must for anyone who teaches Physics or Engineering.
Use can use more heat sensitive liquids or gases yes and also use Radioisotopic Thermalelectric Generators or Thermalphotoviolatic cells for heat generation. In fact, Because the Gamma type can work with at least a 2 degrees temp difference you could use Americium 241 which has a half life of 432 years and an output of .135 kilowatts for the fuel cells. even after a poweroutput decay over 300 years the Watt output would still be sufficent with the temp diference of the vacuum of space.
It looks to me like the gamma type and the beta type are pretty much the same, other than the fact that the beta displacer and power pistons are the same size while the gamma displacer piston is larger than the power piston. Is there any advantage or disadvantage for using one type over the other?
I'm gonna build one and i'm gonna put it in my future miata, to not only increase efficiency by maybe 20% or even more, but to make more power, i guess i'll use it likakindaova heat exchanger or smth, anyways, i want the hot coolant from the engine to pass between the hot piston walls, then pass through a radiator, from radiator to the cold side and then back in the engine. Seems like a cool idea.
I wonder how the boreXstroke ratio affects the efficiency
I too wonder if these could use waste heat from vehicles to improve efficiency, if they're worth it at all. Perhaps you could even drive the alternator with one or at the very least feed some extra air back into the engine like a turbo.
@@IndianaIsntReal yeah, that'd be sick
Very very well explained! I had no &?%$# idea of how a Stirling could work : now it is crystal clear! Of course, the motors as illustrated are didactic : whey would not be efficient enough to be used industrially. Tighter heat transfer on the hot side, water cooling on the cool side and attention to such details would improve efficiency. But to explain how it works : these illustrations are perfect! Very good job YTEngineer!
excellent .. you done a brilliant job made my biggest confusion solved to understand engine ..very many thanks ;)
no problem ☺
very interesting and valuable video
Which of these 3 has:
A. Best Torque?
B. Highest Speed?
If by "speed" you mean number of revolutions per unit of time, this isn't an issue even with slow stirling engines, because a gear ratio will allow you to achieve any number of revolutions a minute, assuming you have the torque to back it up. As for which one has most torque: I have no clue. :)
depends for purpose.. Rally or Pist cars ?
Just going off what it says, the Alpha design has the best power-to-weight ratio. Power (in the case of reciprocating machines) is the integral of torque with respect to frequency. That is, it is the total amount of torque over time that has brought the machine to this frequency.
So, assuming the same weight and frequency, the Alpha design must have the best torque. Although you would use a Stirling design for efficiency, not for torque.
I think I understand now. The power piston is affected by contrast of cold air making less pressure and expansion of hot air making hot air. And the displacer mixes the two different temperatures and also carries the crankshaft down when therenis a low pressure? Am I right , I dk