To generate electricity, to drive ships.
Instead of a propulsion shaft connecting the two, the all-electric drive being tested uses the ship's engines (turbine or diesel) to burn fossil fuels to generate electricity, which is then routed down thick cables to an electric motor that drives its propellers.The idea of using electricity to drive ships is not new.
The industrial revolution began in the West in the late 18th century thanks primarily to the efforts of British engineers and entrepreneurs who sought to exploit the energy from the country's abundant coal stocks and use it to harness the power of steam to drive ships, trains and machines in factories.
That's because a lack of supply will drive shipping costs up.
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The typical electric-drive ship built in the late 20th century is a passenger cruise liner with twin propellers driven by synchronous alternating-current motors and powered by an array of medium-speed diesel engines driving synchronous generators.
They hope to keep shipping firms faithful to their route, which can handle even the biggest of today's container ships and most super-tankers, though sometimes they have to offload some oil to a tow-path pipeline.If the pursuit of economies of scale drives ship sizes beyond 18,000 TEUs, then nature presents another formidable obstacle.
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