1.25" Bore Rocker V Stirling Engine

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Category:

Science & Technology

Tags:

• Stirling Engine
• Hot Air Engine

[skrame01]

How about a comparison between an Internal Combustion (IC) and Stirling Engine (SE) of the same displacement: Here goes:

[aross345]

@skrame01

I don't know why your comments aren't shown, or have been flagged as spam. The latest (above) is only partially shown, above, but was complete in my inbox. The thermal efficiency given for the IC engine seems a few points high, and would only apply at full throttle operation. But if your point is to say current IC engines are amazing machines, I agree. Can stirlings become such? As coolers they already are, but as engines, who knows. That makes them an interesting challenge. AR

[aross345]

At atmospheric pressure, this engine makes about 9 watts of mechanical power. A regenerator would improve that, and, of course, pressurization is necessary for significantly more power. Consider E.F. Clapham's contest winning 5 cc stirling at the 1977 Model Engineer Exhibition in London; It made 39.4 watts @ 900 rpm, charged with air at ~1000psi. Later,with helium at 1200 psi,it produced 95 watts at 2000rpm. The second place engine produced ~5 watts with air at atmospheric pressure. AR

[skrame01]

I agree it is a very interesting challenge and it seems there should be more applications for these machines, considering possible advantages of the SE. People should find or invent and make those applications where the SE is the winner.

[leandrojwfolha]

@aross345 Thank you! I noticed that you are well informed about these types of engines.