- Electric boat -
- Low environmental stress and low carbon society
- Zero emission of NOx, SOx and CO2 when running
- Lakes and marshes where the use of combustion engine-propelled ships is
prohibited in Europe and America.
- Reducing CO2 levels by 50-70%
- Low noise and low vibration
- Sightseeing boat, traffic boat, ferry, research vessel, fishing boat, fisheries
- Easy maneuvering due to the use of an azimuth thruster
- Running cost and market -
While the estimated construction cost for this
type of boat is about 1.5 times that of a combustion engine-driven craft
with the same horsepower, the running cost for the battery-powered boat
is about half that of a conventional vessel.
Based on governmental data, it is estimated that
more than 160,000 boats can be fitted with electric propulsion in Japan.
- Lithium-ion battery with plug-in system or rapid charging system -
- The dockside-mounted rapid charger can bring the boat's battery up to 80%
of full charge within 30 minutes, which is a much shorter time than is
possible using conventional charging systems (usually taking 10 hours).
- The boat can operate for 45 minutes at full speed and remain at berth for
30 minutes while recharging in a cyclic operation.
- The powerful lithium-ion battery gives the boat a running speed of around
10 knots (19 km/hr), enabling it to navigate not only in calm waters but
also in open sea conditions where wind and waves prevent the operation
of conventional battery-powered craft.
- Participation enterprise consortium -
The electric boat "RAICHO-I" was built
and the rapid charger was installed by the university, with financial and
technical support from the participation enterprise consortium.
- TEPCO: Joint research
- Tosen Marine Inc.: Joint research
- Yamaha Motor Co.: Ltd., Joint research
- ULVAC, Inc.: Joint research
- Fuji Heavy Industries Ltd.: Technical co-operation
- Yokogawa Electric Corporation: Technical support
Tokyo University of Marine Science and Technology, Etchujima campus
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