MtB Posted December 8, 2018 Report Share Posted December 8, 2018 1 minute ago, mark99 said: Bearings. Swerve to engineering detail instead of scientific fundament. Quite. It isn't bearing friction that prevents a low delta T Stirling engine poking out loads of power, its lack of energy available from the power source! Far better to do some basic sums and prove the concept can work rather than spend time, effort and money to build it an find out it doesn't. Link to comment Share on other sites More sharing options...
WotEver Posted December 8, 2018 Report Share Posted December 8, 2018 42 minutes ago, mark99 said: Bearings. Swerve to engineering detail instead of scientific fundament. Indeed. LTD (Low Temperature Differential) Stirling engines have to be absolutely huge in order to generate even small amounts of energy. One example I’ve seen suggested that “The size must be quite large even for 100 watts. Figuring a MEP of 2.5 to 3.5 psi, a displacer bore of 60", a power piston of 12" and 12" stroke, you might see 1 i.h.p. at 90 rpm after loses, you may harvest a third of that in electrical wattage”. So that’s maybe 250W for a 5 ft diameter displacer bore. In theory. Link to comment Share on other sites More sharing options...
WotEver Posted December 8, 2018 Report Share Posted December 8, 2018 2 hours ago, sailor mcgee said: a larger one can generate up to 150 kilovolts An LTD Stirling engine? On a narrowboat? At what current? Voltage means nothing. A Van de Graaf generator can easily generate over 100kV but it wouldn’t power much... Link to comment Share on other sites More sharing options...
sailor mcgee Posted December 8, 2018 Author Report Share Posted December 8, 2018 :s 48 v? ungenfär Link to comment Share on other sites More sharing options...
MtB Posted December 8, 2018 Report Share Posted December 8, 2018 10 minutes ago, WotEver said: An LTD Stirling engine? On a narrowboat? At what current? Voltage means nothing. A Van de Graaf generator can easily generate over 100kV but it wouldn’t power much... Oh I dunno. I think a Van de Graaf generator can generate enough power to make your hair stand on end... 1 Link to comment Share on other sites More sharing options...
Tumshie Posted December 8, 2018 Report Share Posted December 8, 2018 3 hours ago, Mad Harold said: Just had a look at "Stirling Engines" on Wikipedia. Would post a link if I knew how. Quite fascinating how they work. Best of luck,Sailor. https://en.wikipedia.org/wiki/Stirling_engine Link to comment Share on other sites More sharing options...
Mad Harold Posted December 8, 2018 Report Share Posted December 8, 2018 Just now, Tumshie said: https://en.wikipedia.org/wiki/Stirling_engine Thank you Tumshie,but I don't know how to transfer the Wikipedia text to CWF. In other words how to get the little blue writing onto my post. Link to comment Share on other sites More sharing options...
mark99 Posted December 8, 2018 Report Share Posted December 8, 2018 5 minutes ago, Tumshie said: https://en.wikipedia.org/wiki/Stirling_engine Quite a few of us have them on our stoves. Link to comment Share on other sites More sharing options...
TheBiscuits Posted December 8, 2018 Report Share Posted December 8, 2018 4 minutes ago, Mad Harold said: Thank you Tumshie,but I don't know how to transfer the Wikipedia text to CWF. In other words how to get the little blue writing onto my post. Just paste the text from the address bar into the reply box. The forum software will recognise it as a link and make it one. Link to comment Share on other sites More sharing options...
MtB Posted December 8, 2018 Report Share Posted December 8, 2018 7 minutes ago, mark99 said: Quite a few of us have them on our stoves. I have quite a few on my stove. lol! Link to comment Share on other sites More sharing options...
Mad Harold Posted December 8, 2018 Report Share Posted December 8, 2018 1 minute ago, TheBiscuits said: Just paste the text from the address bar into the reply box. The forum software will recognise it as a link and make it one. Thank you. I am quite computer illiterate, gimme a box of spanners and an engine anyday. Link to comment Share on other sites More sharing options...
Tumshie Posted December 8, 2018 Report Share Posted December 8, 2018 6 minutes ago, Mad Harold said: Thank you Tumshie,but I don't know how to transfer the Wikipedia text to CWF. In other words how to get the little blue writing onto my post. If I have the Wikipedia page open I right click (if using my laptop) or press and hold (if using my iPad) the search bar at the top of the page, it will then offer you the option to copy the link that is now highlighted in the search bar, click copy. You then go back to the post where you want to place the post and click where you want it to be placed, right click or press and hold will then offer you the potion to paste, click paste and hay presto Link. I hope that's not as clear as mud. Link to comment Share on other sites More sharing options...
MtB Posted December 8, 2018 Report Share Posted December 8, 2018 Just now, Tumshie said: click paste and hay presto Link. Is that anything to do with the URL field? Link to comment Share on other sites More sharing options...
Tumshie Posted December 8, 2018 Report Share Posted December 8, 2018 (edited) 13 minutes ago, Mad Harold said: Thank you. I am quite computer illiterate, gimme a box of spanners and an engine anyday. Unfortunately computers have become a necessary evil - the government keeps asking me to fill out more and more forms and they don't seem to be able to read my hand writing any more. 5 minutes ago, Mike the Boilerman said: Is that anything to do with the URL field? Yes kinda ETA It may be a muddy field though. Edited December 8, 2018 by Tumshie Link to comment Share on other sites More sharing options...
bizzard Posted December 8, 2018 Report Share Posted December 8, 2018 Link to comment Share on other sites More sharing options...
Tumshie Posted December 8, 2018 Report Share Posted December 8, 2018 Just now, bizzard said: That's even better, Biz. Link to comment Share on other sites More sharing options...
MtB Posted December 8, 2018 Report Share Posted December 8, 2018 3 minutes ago, bizzard said: Curiously erotic, innit! Link to comment Share on other sites More sharing options...
Tumshie Posted December 8, 2018 Report Share Posted December 8, 2018 Just now, Mike the Boilerman said: Curiously erotic, innit! Funny, I thought that too - but I wasn't going to say any thing. Link to comment Share on other sites More sharing options...
Graham Davis Posted December 8, 2018 Report Share Posted December 8, 2018 Knew there had been a discussion about something similar recently: Link to comment Share on other sites More sharing options...
bizzard Posted December 8, 2018 Report Share Posted December 8, 2018 5 minutes ago, Mike the Boilerman said: Curiously erotic, innit! Yes. If you construct your own hot air engine you can enter it in the Model Engineer competition. You design one to run from the heat of a single nightlight candle, they seem to call them Tea lights these days. The original night lights, Wrights, can't remember, ran for precisely 8 hours, thes are the wuns to use for the competitition. The one that develops the leest continuous powder over that period is the worst looser. Escuese any mysteaks, am writing this by the light of a tea light. Link to comment Share on other sites More sharing options...
jonathanA Posted December 8, 2018 Report Share Posted December 8, 2018 (edited) Are you using a sterling engine to power your internet connection too ? Edited December 8, 2018 by jonathanA Link to comment Share on other sites More sharing options...
Sea Dog Posted December 9, 2018 Report Share Posted December 9, 2018 Whilst this is a fascinating idea, my boat is currently powered by a nuclear fusion reactor made from washing up liquid bottles and some sticky backed plastic following a traditional Blue Peter design. I'm disappointed it's not recyclable, but otherwise I think it shades this Sterling engine project. I'll be more interested when the OP rolls out the plans for her Perpetual Motion Engine... Link to comment Share on other sites More sharing options...
WotEver Posted December 9, 2018 Report Share Posted December 9, 2018 Surely Brown’s gas should feature in this thread somewhere... Link to comment Share on other sites More sharing options...
TheBiscuits Posted December 9, 2018 Report Share Posted December 9, 2018 3 hours ago, Sea Dog said: Whilst this is a fascinating idea, my boat is currently powered by a nuclear fusion reactor made from washing up liquid bottles and some sticky backed plastic following a traditional Blue Peter design. I'm disappointed it's not recyclable, but otherwise I think it shades this Sterling engine project. I'll be more interested when the OP rolls out the plans for her Perpetual Motion Engine... You are not thinking this through - simply drive the Stirling engine off an electric hotplate. The engine runs hotter making enough power to allow you to turn the hotplate up so the engine runs hotter making enough power to allow you to turn the hotplate up so the engine runs hotter. Oops! Thermal runaway on aisle three! Link to comment Share on other sites More sharing options...
IanD Posted December 9, 2018 Report Share Posted December 9, 2018 18 hours ago, Mike the Boilerman said: Oh I dunno. I think a Van de Graaf generator can generate enough power to make your hair stand on end... Voltage... ? Link to comment Share on other sites More sharing options...
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