Subject:
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Re: Gray VS. Black Metroliner Nose
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Newsgroups:
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lugnet.trains
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Date:
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Thu, 1 Nov 2001 14:42:15 GMT
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Viewed:
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770 times
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In lugnet.trains, Larry Pieniazek writes:
> Your
> theoretical maximum efficiency is upper bound by this ratio
>
> (operating - ambient)/ambient
>
> if I am remembering right.
I'm not, since that can lead to ratios greater than one which is wrong. It's
(operating - ambient)/operating
which means run in colder climates (absolute zero is ideal if you can find
it... hence heat engines can be quite efficient in shaded locations in
orbit) or increase the operating temp.
Got a detail wrong but the argument stands. Arguing thermodynamics may be
off topic for .trains so feel free to redirect or ask for redirection.
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Gray VS. Black Metroliner Nose
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| (...) You can challenge it all you want. But you're not arguing with ME, you're arguing with thermodynamics. (unless you can show I've misapplied it) (...) and I bet their operating temperature differential is higher, too, being stationary. That's (...) (23 years ago, 1-Nov-01, to lugnet.trains)
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