Energy efficient hybrids for Rijkswaterstaat
Rijkswaterstaat, the Dutch agency that maintains and controls the country’s coastal infrastructure, has placed a contract with the Bijlsma Wartena shipyard to build three multi-functional hybrid vessels for its national fleet.
These vessels will be the first hybrid vessels of their type in Holland capable of operating under battery power in environmentally sensitive areas. Scheduled for the first vessel to be delivered in 2018, the large battery packs of these 40-metre-long vessels will be supplied by EST-Floattech. A total of over 330 batteries will be installed in each vessel.
This is the first time that Rijkswaterstaat has commissioned such multi-functional and energy efficient vessels. The MPV 30s are each equipped with batteries which provide 882kWh of storage, enough to allow the vessels to conduct all of their day-to- day activities under electric power alone. The vessel’s batteries supply enough electricity to operate the vessel and all of the equipment on board including the deck crane and the stern A-frame without consuming any fuel.
These MPV 30s will be used for a variety of functions, such as channel marking, patrolling, survey and fishery monitoring and they will operate on the major inland waterways, the Wadden Sea, and up to 30 miles off the North Sea coast. Bijlsma Wartena designed the hull to reduce the resistance, and the vessels are designed to be able to operate in two directions using the podded propulsion system. The main engines are a pair of Caterpillar C18 diesels with each one producing 550kW.
The heat generated by the engines is re-used for the vessel’s radiators, boilers and deck heaters. The new vessels are designed to be highly energy-efficient with solar panels providing extra energy for the hotel load.
“The MPV 30 is the first working ship in the Netherlands that is capable of fully electric operation. It is unprecedented for such a large seagoing vessel to be able to function entirely without diesel power. These types of ships and applications represent a great opportunity for the Dutch shipbuilding industry.” commented Bijlsma Wartena’s Managing Director Tjeerd Wiebe Bijlsma.
“With its hybrid power system, the ship can sail under full electric power or use its engines to sail as efficiently as possible by generating electricity with a precise coordination between the batteries and the motors. The engines run at the optimal RPM in order to minimise the emissions of fine particulates, CO2 and NOx, and to significantly reduce fuel consumption. The optimal engine load, combined with the reduced soot emissions also means that the vessel is much less expensive to maintain.
The first two vessels will be delivered in 2018, and the third will follow in 2019 and there is the potential for further contracts in the future.
By Dag Pike
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