Stirling Engine Model Demonstration
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All Comments (140)
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Helium would be a better choice of gas as it is inert. It is 10% less efficient in a sterling engine than hydrogen, but will not seep through the metal. It is also cost effective to obtain in the small amounts needed. Sterling engines fell out of favour (for the last time) in the 1930s, although Philips made some amazing improvements to the original designs. Would be interesting to see the improvements that could be made with the latest advances in materials technology.
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Not in production yet... hmm could it be to the high costs of materials and the problem hydrogen has with seeping through metals not only all that but H² can also cause the embrittlement of metals.
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It isn't practical enough for placing on a vehicle. Solar panels also only work well when directly facing the source, not just facing up. If facing up, it must be a clear sunny day for them to produce any current. Considering the power output to surface area, you might only get a few hundred watts on a sunny day. Not only that, your car would be ugly and it would be difficult to insulate as it is well known that solar panels get very hot...imagine all the extra material and weight you have to a
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Why not demonstrate the charging of real electric car for 8 hours (typical day at work in the parking lot). What kind of charge could it offer in various parts of the US? Just a question: Why hasn't electric car companies put the flexible solar panels on the hood, trunk, and top of electric cars? Seems like a lot of surface space with direct sunlight.
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all this stirlings get a lot of media, and they look cool, but i still doubt that it would power something usefull, sure it might help if you live in a mountain and need to power an emergency radio... but what about a PC and its 500w PSU? a house? i think someone out there working for electricity companies might have thought about it already.
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@randommagnum Well of course it depends on the size of the fresnel lense also, i doubt a mirror can burn a hole in a penny in a few seconds, but who knows. and yes it decreases in pressure (not mass)
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@celloprof I don't think Fresnel lenses are as efficient for the size, compared to mirrors, but it does have some advantages. They both have pluses and minuses. That's the good think about getting the free market into this stuff...whichever is better, that's what will triumph hopefully.
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@celloprof Uh, yes...I know how a Stirling engine works. I wasn't really asking that...it was rhetorical. :D
Even still, I appreciate you taking the time to explain it. There is one little detail that's off on #2 though...actually, a couple of details... When the air gets shuttled to the other side of the displacer to be cooled, it decreases in pressure (not mass); it doesn't "pull" the piston in...the piston compresses it, BUT this takes less energy than it got from the power stroke.
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gmesthermax 5 months ago 4
wait, 1 foot in diameter=1 kilowatt in optimal conditions?! I am going to be a billionaire!! :D
MrJastin 1 year ago 2