External combustion engine

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plodder
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External combustion engine

Post by plodder » Tue Jun 28, 2022 12:17 pm

Not sure if the name is entirely accurate but anyway.

https://mobile.twitter.com/TheDreadShip ... 0802194435

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lpm
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Re: External combustion engine

Post by lpm » Tue Jun 28, 2022 12:35 pm

Oh great, another moron-gif twitter thread. For stupid people who need silly illustrations.
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tenchboy
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Re: External combustion engine

Post by tenchboy » Tue Jun 28, 2022 12:42 pm

Thanks plodder, enjoyed that. I especially liked the illustration of Alfred Nobel's aluminium yacht. I don't know much about boats but that looked pretty slick to me.

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tenchboy
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Re: External combustion engine

Post by tenchboy » Tue Jun 28, 2022 12:42 pm

Ah!

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Grumble
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Re: External combustion engine

Post by Grumble » Tue Jun 28, 2022 4:33 pm

Seems entirely lifted from Wikipedia
https://en.wikipedia.org/wiki/Naphtha_l ... prov=sfti1

Not that it’s a bad thing to promote interesting stuff everywhere, but it would be nice to throw credit around (unless of course I have the order of events the wrong way around, and maybe the Twitter thread writer also wrote the wiki page)
A bit churlish

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nekomatic
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Re: External combustion engine

Post by nekomatic » Tue Jun 28, 2022 6:24 pm

Given Wikipedia’s mission is to spread knowledge for free for the greater good of humanity*, it seems a bit churlish to complain of someone taking Wikipedia content** for free and spreading it for the greater good of humanity, but with pictures.

And for anyone who doesn’t like moronic Twitter threads, I can reveal to you this one weird old trick for not having to see them.

* Well I assume it’s something like this
** if they have in fact done so
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Bird on a Fire
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Re: External combustion engine

Post by Bird on a Fire » Tue Jun 28, 2022 7:04 pm

Yeah, what a bunch of killjoy nyer-nyers upthread.
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lpm
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Re: External combustion engine

Post by lpm » Tue Jun 28, 2022 8:03 pm

The day we stop fighting back against stupidity is the day the world goes to sh.t.

That day was in early 2004.
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Bird on a Fire
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Re: External combustion engine

Post by Bird on a Fire » Tue Jun 28, 2022 8:17 pm

lpm wrote:
Tue Jun 28, 2022 8:03 pm
The day we stop fighting back against stupidity is the day the world goes to sh.t.

That day was in early 2004.
TLDR

Can u do a emoji+gif version plz.
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Boustrophedon
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Re: External combustion engine

Post by Boustrophedon » Wed Jun 29, 2022 10:20 am

The various article seem to skate over the one salient feature that made early steam engines dangerous; the large volume of superheated water present in a fire tube boiler. Later water tube boilers are much less prone to catastrophic explosions as there is less water and hence less stored energy and the inherent strength of small tubes versus a big cylindrical vessel, critical crack length and all that.

Using naphtha in a 'water tube' design is quite logical in an engineering sense so long as you use a high degree of superheat, else the Carnot efficiency is low.

It should be noticed that the CANDU nuclear reactor is a water tube design whereas all the other designs AGR and PWRs are essentially fire tube designs with large pressure vessels.
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plodder
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Re: External combustion engine

Post by plodder » Thu Jun 30, 2022 4:09 pm

Boustrophedon wrote:
Wed Jun 29, 2022 10:20 am
The various article seem to skate over the one salient feature that made early steam engines dangerous; the large volume of superheated water present in a fire tube boiler. Later water tube boilers are much less prone to catastrophic explosions as there is less water and hence less stored energy and the inherent strength of small tubes versus a big cylindrical vessel, critical crack length and all that.

Using naphtha in a 'water tube' design is quite logical in an engineering sense so long as you use a high degree of superheat, else the Carnot efficiency is low.

It should be noticed that the CANDU nuclear reactor is a water tube design whereas all the other designs AGR and PWRs are essentially fire tube designs with large pressure vessels.
I quite like the idea of a petrol-cooled nuclear reactor.

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Martin Y
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Re: External combustion engine

Post by Martin Y » Thu Jun 30, 2022 5:30 pm

plodder wrote:
Thu Jun 30, 2022 4:09 pm
I quite like the idea of a petrol-cooled nuclear reactor.
Slightly less of an instant "Wait, what?" than sodium cooled ones.

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EACLucifer
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Re: External combustion engine

Post by EACLucifer » Sat Jul 02, 2022 10:00 am

These sound dangerous, but they actually worked reasonably well. They were generally quite low pressure, and not the most efficient, but as a way of dodging a regulation that honestly wasn't really very necessary for small water-tube boilers, they were fine.

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