Sea Change is a ferry powered by compressed hydrogen, so it can run for 2 days on one refueling. The vessel measures 22 meters in length, is made of marine-grade aluminum and can take up to 84 passengers on board. Its twin electric motors with a capacity of 400 horsepower allow it to develop a maximum speed of 22 knots, or 41 km / h. It cannot be denied that hydrogen power seems to be even created for such structures – just like airplanes, providing them with a range that is not available in a different kind of friendly power environment, e.g. batteries.
The ferry will carry 246 kg of hydrogen in special containers (pressure 250 bar), and a large PEM fuel cell will convert it into electricity with a power of up to 360 kW, and a lithium battery will serve as a support, which will guarantee an additional 100 kWh buffer, if necessary will propel the unit to full speed. 246 kg of hydrogen represents roughly 8.3 megawatt hours of stored energy, because one kilogram of hydrogen stores approximately 33.6 kWh. And although fuel cells are usually around 50% efficient when converting hydrogen into electricity, it turns out to be enough to keep the ferry running for two days without refueling.
Sea Change will also be a technological demonstration of the Water-Go-Round platform (an initiative to switch to environmentally friendly marine propulsion, because it is this sector that largely contributes to huge carbon dioxide emissions), which will collect data for California Air Resources for a period of three months The board will then be loaned to one of the existing ferry operators to conduct full commercial operations, making it the world’s first commercially available hydrogen powered ferry. We also remind you that MF Hydra is not far behind from the Norse Group, an even larger hydrogen-powered ferry, which should offer even greater ranges, because in this case we are talking about liquid hydrogen, which offers even greater energy density than the gaseous form.
Source: GeekWeek.pl/Switch Marine
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