Displacer vs. Regenerator, LTD Stirling engines, side by side comparison.
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- čas přidán 7. 08. 2020
- Two of the same Stirling engines. The one on the right has a regenerative displacer added.
Adding a steel wool regenerator increased the weight of the displacer by three grams. RPM of engine on left, with ordinary displacer: 155 RPM
The engine on right, with regenerator 270 RPM
For details, see discussion on the Stirling Engine forum:
stirlingengineforum.com/viewt... - Věda a technologie
Sorry to say without a better view of the disc we really can't see a difference visually.I think a lot of viewers are confused by what you mean.Externally they look the same so someone not familiar with Stirlings would get confused.Since the disc itself and the location of the piston are so important maybe a disassembled view would help people understand better,thanks for making this vid.i know what you mean.
A link in the description opens to a forum with more in depth discussion of the subject, additional photos etc.. stirlingengineforum.com/viewtopic.php?f=1&t=2690&sid=9a1df9fa7fb4bf9bb36474463081beff The video was intended primarily for other forum members rather than a stand alone video. Hopefully in the future, when I get my workshop set up better, I can take better videos and find a video editor and computer. Right now I'm pretty limited to shooting short videos on my cell phone at the kitchen table and mostly rely on the forum for more in depth discussion. stirlingengineforum.com/viewtopic.php?f=1&t=2690&sid=9a1df9fa7fb4bf9bb36474463081beff
enjoyable instructive video. I love Stirling engines so subscribed
very good .. really shows the difference
i saw a type of regenerator that was fixed on the bottom. a kind of insulated spool surounded by steel wool. a diaphragme was on top. the thing was very fast.
The description reminds me of a TK Motors "hybrid" czcams.com/video/CXsFNPmjluo/video.html
A really amazing engine. Running: czcams.com/video/r9lYsW0Df08/video.html
O stirling da direita do vídeo está mais " veloz", sem duvidas!!!!!😊😊😊Muito boa observação my friend!!! Um abraço e muita saúde para você e sua familia!!!!
Thank you! The increase in speed is due to the steel wool Regenerator, which can be seen in more detail here: stirlingengineforum.com/viewtopic.php?f=1&t=2690
good advice from this video. czcams.com/video/gVU6uqn0cII/video.html to not compact the steel wool so it is transparent.
Estou feliz que meu vídeo tenha sido útil para você.
Parabéns, você alcançou um bom resultado.
Esses dois motores são industriais ?? Ou você fabricou esses dois motores ?? Sempre quis fazer esse motor com pistão como você fez, mas nunca tive tempo de fazer o projeto, sempre imaginei bons resultados com um regenerador.
Qual é o curso de cada pistão?
Leandro Wagner.
The engines are kits from this shop: www.stirlinghobbyshop.com/english/stirling-engine-solar-ltd-low-temperature-stirling-engine-ltd-stirling/ltd-stirling-engine-ja-828/#cc-m-product-9759217783 Some modifications were made; nylon bolts to replace steel bolts to cut down on conductive heat loss in both engines. In the one faster engine Regenerator added to foam displacer. I assembled the kits, but have no connection with the manufacturer.
Nice experiment with those LTD engines! Congratulation! If you want more speed than change the steel wool to plastic sponge it could reduce the weight too. Greetings from Hungary! BLADE
Plastic sponge? What sort of plastic sponge exactly? Do you mean like for scrubbing pots and pans? I noticed that some types of plastic, like polyester or Nylon have a higher heat capacity than steel. Also some commercial model Stirling Engines have a sponge for a regenerator. Can you be more specific?
@@peoplesresearchcenter6184 Plastic sponge means as aquarium filter, rare open cell sponge. The displacer should light as possible. Styrofoam basic with few big circle cut off from that and put the sponge into the displacer material. As like here, but first the steel wool insert could work. czcams.com/video/CdX7hwjhgA4/video.html
@@AttilaBlade Thanks, though, there are several different open cell sponge-like aquarium filters made of different material. I had been considering trying aerogel. By "rare", do you mean natural sponge?
@@peoplesresearchcenter6184 No. The adjacent cell's distance is bigger, so the air could flow through easier.
What is the difference bw regenerater ND displacer ltd sterling engine?
The engine with the "regenerator" has holes in the displacer that are filled with some fine steel wool.
Someone on the Stirling engine forum pointed out the experiment may be flawed, because there are no holes through the displacer of the unmodified engine.
The higher speed of the "regenerator" engine might be a result of reduced resistance to air flow rather than "regeneration".
Does the faster one consume the heat energy faster?
In theory, the regenerator (the faster one) is supposed to conserve heat, using heat more frugally while putting out more power. More heat gets converted to mechanical work or power output. In this experiment the slower engine actually ran a little longer however. It would require a lot more experimenting I think, to know anything for sure. The general consensus, though, seems to be that a regenerator (usually) improves the engine performance rather markedly. So the engine runs faster because less heat is wasted (in theory anyway).
@@peoplesresearchcenter6184
Yeah it's probably a combo of both being more efficient and more hungry. It looks to be going at least twice as fast.
amazing but which one has regenerator
did you read the description of the video
The one on the right that runs the fastest. The regenerator is built into the displacer. More info is posted on the Stirling engine forum
@@peoplesresearchcenter6184 hi thx for reply can we discuss more on any forum.actually iam working on it
@@salmantalash4515 Certainly. I started a thread on the topic of LTD type regenerators here: stirlingengineforum.com/viewtopic.php?f=1&t=2690 or if you prefer some other forum, just let me know, or right here is ok with me too. There is also other forums I post on. If you just search my name "Tom Booth" + "Stirling engine".
Bukan tutupnya jembatan timbang ala2x Londo geetoo..
I don't see any difference between both displacers. They look the same....
There are some pictures of the modified displacer (with regenerator) on the Stirling engine forum: stirlingengineforum.com/viewtopic.php?f=1&t=2690
Contoh bukan misalnya kilang minyak
some info. whynhel would you add Mass to the displacer; when steel wool could be located at the TOP of the Cylinder. do you See that, when an engine is vertically oriented, GRAVITY continually opposes the Upwards movement of components.!!! do you See that, in this configuration, the sides are TOO close together.!!! and, the cold-side is located DIRECTLY ABOVE the heat source !!! conclusion: this engine config SUCKS. when an engine runs, un-loaded, it is a do-nothing; and a nominal amount of engine slowing, under load, is not seen. googletranslate
Thank you for the analysis. Why do you think adding the steel wool to the displacer (engine on the right) results in higher RPM?
Also, see this article: www.solarheatengines.com/2008/06/09/simple-stirling-1-performance-with-and-without-regenerator/