| Re: OT Interesting video
"AustinMN" <tacooper260@hotmail.com> wrote in message
news:1169230416.589306.95270@11g2000cwr.googlegrou ps.com...
> I think you are thinking about a specific application - aircraft
> engines. A well-built turbine should come out near twice the
> efficiency of a diesel with the same output. But it would cost several
> times as much to make.
>
> If diesels were more efficient, we would not use turbines in power
> plants, where even tiny efficiency advantages make significant profit
> differences.
Have you seen the efficiency of big diesels, as used in eg ships (the 2
stroke scavenging ones)? It's astonishingly high (55%?). Gas turbines plus
steam turbines in a combined cycle manage to beat it, but it's pretty close.
cheers,
clive
|