You're here: My Science Blogging » Discovery » Article: Superconducting Ships
Yessi Pratiwi — July 9, 2007 / 6:03 pm
Electric ships offer a cleaner, faster and simpler alternative to diesel-powered craft. This has been studied by naval engineer.
The study said, electric ships could be especially efficient if their propellers were powered by superconducting motors. The only trouble is, superconductors operate at temperatures close to absolute zero (-256°C) and the heat generated is difficult to dissipate inside a ship.
The good news is : German engineering giant Siemens thinks it can get around such problems. They has designed a motor that uses high-temperature superconductors. This superconductors only need to be cooled about -140°C or so. The motor is placed inside a pod that sits directly beneath the ship. This make it is almost completely surrounded by seawater. Then, the heat is pumped away and the surrounding seawater allows it to dissipate far more efficiently, keeping the motor at the required temperature.
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