Ideal cycle Stirling engine

[ericrob2112]

i think that is creating to much friction. you can create the same pistons patern just with a crank and conecting rods. with less friction. (i think)

[358Eki]

Do you think that high compression ratio is the main way to do and get advantage with these many types of heat machines (work done on compressing the working gas on hot end)?

In my opinion this help heat flow in hot end only and adds stress to mechanics...

Nice real work and efforts presented here, thank you.

About this I agree with a comment of "onecraftydude" about two bearings with lever-springs or similair taking out the hitting noise making gap for smoother and long lasting operation...

[lapere71]

@358Eki Low compression ratio is better than high in striling cycle machines.

[358Eki]

@lapere71 That's I find out in practice also...

Better to have something out of machine if it is suited to job and machine is long lasting - also most of the energy I´m losing when heat is not even entered the engine and it's working gas.

Got some slow work going on with continous torque, less need of flywheel, stress and still overall simplicity with inaccurate manufacturing robustness, easy materials etc... These should be good for a reliable subsystems where "lost heat" is used anyway...

[lapere71]

@railrdr523 Yes.This only has ideal gas isochoric transfer to the cold cylider after expansion. Do not give up, power not the most important :)

a.) power is a function of charge pressure and working gas. Pressurize 200bar with hydrogen and you have a power.

b.) this is the reason of my work. of course they are inefficeint. gas is wrong place in trad. 90deg piston engines.

[AngryVGFur]

so... it's been said before, but it seems like a cam like that would have alot of friction compared to a traditional crank. how much friction is there, and would it need an extra flywheel?

[lapere71]

@AngryVGFur can't solve friction problem with flywheel. Flywheel is only energy reserve and it cause more friction.

[Aviator168]

@railrdr523 The reason of this mechanism is solve both a) and b). With the mechanism, the stirling will produce a lot of power and it will be much more efficient.

[Aviator168]

@railrdr523 How do you know a stirling engine won't have enough power? Please do a search on the net to see which of the stirling engines out there actually implements the ideal cycle. One of the reasons current stirling engines do not have a lot of powers is that they can't achieve high compression and this cam implementation can make that happen. The only problem I have with his design is the connect between the hot and the cold cylinder.

[Aviator168]

@railrdr523 How about this one. v=L3TIQ_YeBaU

[Aviator168]

@railrdr523 You are saying ball bearing on traditional crankshafts have less friction? IMO an roller with ball bear on the cam will have about the same friction. The only issue I can see is the stroke have to be kept short because the majority of the force on the piston rod now is sideways.

[Aviator168]

@railrdr523 How did you arrive to that conclusion?

[thisispeace]

Great work!

[Aviator168]

@thisispeace How did you arrive to the conclusion?

[thisispeace]

@Aviator168 What conclusion?

[piespokladowy]

super

[acerkiwi]

Check out my engine , its finished and it runs!!!

[richieT737]

I love inovation and design that stimulates thought and judging by the comments you have certainly done that.

[OrganicDrew]

The trick to getting around patent laws the legal way is to make sure you never "affect the public interest" by "entering into commerce" so make sure not use sell the invention with Federal Reserve Notes, Checks, Money Orders or Credit Cards. Barter or even Silver and Gold coin under Title 31 Section 5112 of the US CODE are the Ideal medium to conduct a trade with "property" for property.

and best yet, no TAXES on property trades! see George Gordon dot org for More!

[gurc]

Excellent work. Really best Carnot cycle.

[1nf3rn042]

nice!!!!!!

[avrilinblood]

That might make a better stroke but I think it will have more friction, so more energy will be lost in the form of heat, and more wear on parts. Way too much friction...

[spadez1989]

Barrel cams are extremely inefficient, I think this will create far too much friction for the stirling.

[uglyengineer]

Agreed, but I wish he would have posted a better picture of the diagram, assuming its real running data. Barrel cams can work well in the right application.

[Aviator168]

@spadez1989 He could just to a roller there to reduce the friction.

[Aviator168]

He can just put a roller there to reduce the friction. 

[hoppper26]

doesn't there need to be a displacer piston ???

[565Customz]

use 4 ball bearing in the sides of the pistons and no rings..hardly any friction there.

[TheVshark]

ideal my butt, there are piston rings.....hmm lets add some more friction to it....

[Axbent]

not much different from the old swash plate idea, just a cam instead of a plate!?

[lapere71]

@Axbent no, no, n, cam is not a idea. Idea is that cold cylider volume is zero during expansion process and hot volume is almoust zero during compression process.

[Aviator168]

@lapere71 This great. The working gas is being heated while in high compression rate. That alone will increase power density alot.

[thepresident1981]

@lapere71 very very nice sounds like something that would take me a month to figure out u have really took the Stirling engine idea and made it efficient way more efficient thank you

[imikewillrockyou]

That is brilliant! I wonder how much that increases the efficiency of the sterling cycle. In other words how much energy is being lost on the cam as compared to the savings? I've always thought Robert Sterling's original concept was a little oversimplified but it works so I don't complain. But certainly this is the right idea very good.

[TheDave570]

if you wnat to see the original of this engine then go to Ron Steele's web site. He has a US Patent on this type of stirling drive--it's called the "Double cam drive" be careful what you do with this it's Patened already !!!!!!

[lapere71]

Ron Steeles engine is traditional barrel engine

. I have 144 (2/5 turn) degrees phase shift and special guide curve in cam. My innovation has almoust ideally PV plot, Ron havn't. Barrel engine is 100 years old innovation. US patents are nothing serious.

[marekracing]

good luck with your stirling engine and do not worry with such a ***** which haven´t any seriosly knowledge in thermodynamic laws. Your design is perfect comparing to Steele stirling toy!

[NOBOX7]

@lapere71 does isothermal compression

require less energy then isothermal expansion generates? i love work, i am subscribing to your channel you do very good research, i have a new stirling configuration i would like to show you ,

,,, keep up the good work, dont let a bunch of american assholes discurage you, i am an american by the way, i just know how these people can be

[ricande]

If you make it yourself, he can take his patent and wipe his ass with it.

[deltaxcd]

You need to seal it somehow in solid casing and fill with helium under 10-20bar pressure

no need to care about piston sealing too much better leave them loose to avoid friction

[GoGreen4PlanetEarth]

Great invention for Earth

[onecraftydude]

Make the groove wider and add bearings inside the groove. Make the groove wider than the bearing and give it a try. I love the movement. If you would like to make me one to play with I would appreciate it.

[imikewillrockyou]

That's a great CAM for a sterling engine. Do you have a video of the engine actually running?

[daneaston101]

that is very cool. nice and elegant.

what heat gradent do you require to overcome the friction. might have an ideal heat supply.

[bussdriver]

So when is the next installment on the progress of this engine?

[lapere71]

I don,t know. There is too much friction atthemoment Maybe i build new one ...

[brainycheddar]

Where did you get access to a 4 axis CNC, and how long did it take you to write up the G-code for it?

[lapere71]

I have one. I made octave code for G-code.

[Rotitomato]

Nice!!!

[barumman]

Sorry, there will be to much friction,nice bit of engineering

[lapere71]

sorry, there is not enough power. Friction is very low (not low as trad_crank_system of course ).

[Aviator168]

@lapere71 Not quite understand what you mean.

[shakaama]

so is a sterling engine just some cool thing machinist get into? i mean i don't understand the hoopla 300+ videos on the sterling engine?

[shakaama]

please educate me. i thought stirling engine had to do with the sun. they were just using the sun as the energy source. the stirling engine is just a simple engine?

[jetboyJ22]

To shakaama-

A stirling engine is just a simple engine, as you said, which can run on any available heat source (sunlight, open flame, boiling water; whatever)

[tomterahedrob]

is the cam less efficient than connecting rods and cranshafts?

[lapere71]

Theoretically no, but practically yes.

[aviers]

dude! this is the same as Radial-Axial engine! (radax). Does anyone have videos of an hidrogen radax engine?

[desiredusername]

(You mean pressure reduces.)

OK, I guess it's fine. I was thinking the cold piston would have to hold back against a low pressure, increasing losses, but I'll bow to someone who's done the equations.

[desiredusername]

I thought this was pretty cool the first time I watched, but now I'm a little skeptical.

For instance, you've got the constant volume transfer to the cold cylinder. Great. Except you pass through the regenerator on the way, which means compression should already been taking place.

[IronGoober]

Excellent,Please post any further developments, I'd like to know if you ever get the engine working.

[simi112]

Very interesting! I am curious that it will work! Congratulate!