[Ducati] engine efficiency NDC

[Alec Moss]

Mark, you have just helped me answer a question.  After that ship crunched
the San Francisco-Oakland Bay Bridge, some friends were wondering what the
heck 58,000 gals of bunker crude was doing in a container ship.  I said it
was the ship's fuel and they wondered why so much oil in a container ship.

Your 20 gals/minute burn rate says your ship would run for about two days on
58,000 gals so I'm guessing most container ships would carry about 400,000
gals of crude just to make one trip across the Pacific.  Holy cow!  And it's
better to get poisoned goods from China than to make our own here?

Facetious, I know.


Alec


On 11/27/07 4:52 AM, "mark middleton" <mark_middleton at hotmail.com> wrote:

> I must admit enjoying this thread.
>    I'm an engineer working on marine slow speed diesels. They are 120RPM,
> crosshead design, two stroke engines with a six foot stroke and approx two
> foot bore. The newest ones have no cam, engine oil opens the one exhaust
> valve and pneumatics close it. We run almost 40 PSI boost and burn about 20
> gallons a min. of bunker C.  The efficiency is further enhanced by a waste
> heat boiler in the exhaust stack. Steam produced is used to, among other
> things,  heat the fuel to a point we can inject it. Last I read was that
> combined cycle gas turbines were giving slow speed diesels a run for their
> money in the thermal efficiency game.
> Sorry for the excursion, now back to Ducatis. . .
> 
> 
>     Mark M
> 
>        2000  748
> 
> 
> 
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