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Cruise Lines and Biodiesel - RCCL in the Lead?


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I think we need to start prodding our cruise lines to start using biodiesel. I think they have largely fixed the recycling and sewage treatment issues, and it's time to start tackling carbon.


Ship's engines run fine on biodiesel, and whoever takes the lead gets my business.



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A typical Diesel uses 4-5 tone /hour a GT uses 7-8 tonnes /hour


a good number of the RCCL ships use only GTs when at sea so their CO2 emisssions are reletivelyy higher than equivalent DG equipited ships. The bio dieslel used is only 1% bio diesel the remainder is mineral based so they have a long way to go.


To be frank ecologogical and cruising are really not two word that should be used in the same sentence!:rolleyes:

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Typical cruise ships are basically floating power stations with a relatively high “hotel load”( e.g.everything from air conditioning to the DJ’s consol and all the ship board lights) as a consequence the fuel consumption curve is an odd shape at very low speeds the hotel load is by far the dominant factor and the MPG is subsequently very high in effect infinity, as the ship's speed increases the forces to push the hull though the water , make the wake and over come air resistance become more dominant. At full speed the MPG is again at a high level but not as high as when the ship is in port moving nowhere but consuming about 10-15MW of hotel power.

The most efficient speed of a cruise ship depends significantly on her hull form this is usually a compromise between block coefficient and drag and cost to build fuel saving features into the hull at the build stage and propeller arrangement but is typically in the region of 15-18 knots.


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