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Low Impact Cruising Idea

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Posted (edited)

There has been recent environmental publicity, legal action and even protests focused at Carnival Corporation in particular and the impact of cruising in general.  The problems range from stack emissions, sulfur, plastics, to sewage, etc.  


They may be some people interested in purchasing a "lower impact" cruising product offer.  It would for the moment be filled with compromises, and there are not a lot of breakthrough technological tools on the shelf, that are not already in use.  This has been validated by our local experts and fact checkers.  


The modern cruise experience uses a lot of electrical power.  Power is used for propulsion (85%+), and hotel loads.   And space aboard is limited.  


The idea would be to design and or rebuild a modest ship that would use a mash-up of technologies.  This has been done recently, at least at the design level.   Not much new ground has been broken, but it should be considered a 1.0 effort. 




The big problem, as has been pointed out by ChengKP75, is the propulsion load.  The ship needs megawatts and the solar and wind arrays produce kilowatts.  The propulsion issue is significant.  After decades with a five ton, 13 hp sailboat, I think massive motors are not required, unless you are in a big hurry.  Think cruising not crossing.  World War II vintage Liberty Ships were 410 feet long, 14,000 tons and had a single 2500 hp. engine.  The top speed was 11 knots.  




There was an interesting number in Wikipedia - 2500hp = 1900kw.    The latest Tesla commercial Powerpack provides around 200 kWh per chest freezer sized battery module (if I am reading it right).  




If you had small engines, could you leave the dock with and or make along the way, enough energy for a modest cruise, from say Miami to The Bahamas?  The cruise line would store up and or buy solar or wind at the ports for charging.   You could add in help from Flettner rotors, sails etc.    We cannot of course support 3000 passengers, ice skating rink, etc.  But it can be a cruise.     



Edited by ew101

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