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Globalworkboats and C5i Maritime Australia are proud to announce the new hybrid propulsion new builds for the 40mtr Security / Patrol/ Crew Boat.
The vessel will comply to BV Classification. It is a proven Aluminium mono hull design.
The vessel is powered by three engines with a light Parallel - Hybrid propulsion system. Effectively, this is a variant of the variable speed shaft generators where an electrical motor is coupled to the main proulsion diesel and can feed energy in two directions, controlled by three fixed pitch propellers.
The bridge and forward passenger seating may be ballistically protected.
In Mode 1 - Shaft Generator mode the electrical machine takes a moderate amount of energy from the main propulsion system to support the Hotel grid.By using this mode all the energy for propulsion + Hotel is being generated by the main engines and the gensets are switched off. As the large main engines runwith much lower g/kWh fuel demand then a partial loaded smaller genset the energy need for Hotel load is significantly reduced, resulting in significant fuelsavingsThis mode of operation in the basic concept can be used from 5% propulsion power to 90- 95% propulsion power and therefore covers a large area for the vesselsoperation profile. In the area of 40 – 90-95% of engine load the added hotel load is produced at around 210 g/kWh for a Caterpillar C32 main engine, much betterthan a partial genset load running generally around 260 – 300 g/kWh. In the area of 5 – 40% engine load the added hotel load increases the load on the mainengines somewhat helping it to run at better efficiency. Also then fuel efficiency will be equal or better compared to the dedicated hotel genset.A secondary benefit is a significant reduction of engine running hours on the genset side, leading to less maintenance and longer life of the genset.
In Mode 2 - Electric propulsion mode the main engines can be switched off completely with both gensets being the only source supply to the vessel. In this verylow speed and station keeping operation profiles, the main engines basically are running idle all the time causing significant suiting and exhaust of the engines.Fuel efficiencies at very low load of the main engine or a true issue for long life time of engines, a problem we see often in i.e. the yachting industry.By removing this operation point from the main engines this harmful operating points are being avoided and the main engines are running only at load points forwhich they are most suitable designed for. Also here the vessel operates with a reduced number of engines on- line reducing running time and maintenance costs.Concluding electric Propulsion saves fuel and operating costs of the engines.
In the high end of performance, the electrical machine can be used to give an extra boost power to the propulsion line it is connected to. Power from the gensetscan give an extra push to the propulsion line to enhance max speed performance. Depending on sizing, this can result in (slightly) smaller main propulsion enginesor/and higher final speed. As this sailing mode generally is used for limited amount of time, the additional fuel consumption for this often is taken for granted.
Main engines are 3 x Cat C32 ACERT DITTA IMO TierII, 1600hp@2300rpm with sprint speed approx 26.5 knots.
Deck area 120m2 with 2tm2 loading.
Passenger capacity for 40 with 13 cabins/ 22 berths for crew/ personnel.
The vessel is built Southern Asia by very reputable Aluminium Shipbuilder.
For a more detailed specification, please feel free to contact us.
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