Diverse operations require flexible systems to maximise efficiency

With the ESS providing power for the main thrusters and the hotel load, the vessel can operate with zero emissions because the gensets do not need to be powered up. Available time in this mode depends on the capacity of the ESS.

This mode automatically starts the number of gensets needed to secure the amount of power for the required sailing speed. Typically, full speed is achieved using all gensets, service speed with a reduced number of gensets and economy speed with one genset. ESS provides peak shaving and secure load ramping to reduce fuel consumption and maintenance needs.

The ESS provides the electric power for the thrusters and the hotel load. The EMS controls the gensets to secure the required power and redundancy.

Manoeuvring is mainly powered by the ESS while the gensets are used to charge the batteries and supply additional power when required.

This mode is mainly powered by the gensets, with the ESS used to reduce load variations ensuring smooth, efficient cargo operations. The ESS provides spinning reserve and peak shaving to optimise genset operation.

In ports where a shore connection is available it can be used to power the hotel load; if it is not available then the gensets supply the needed electrical power. The ESS provides peak shaving, charging if needed, and blackout prevention.

The auxiliary genset is sized for the highest average load while the ESS provides peak shaving during loading/unloading, reducing fuel consumption by ensuring that the genset operates at optimal load.

A diesel-electric propulsion package together with batteries opens up new possibilities: 

• Peak shaving in all operational modes allows the gensets to work at a stable load.  
• Short time overload/dynamic assistance avoids the need to start up gensets to supply additional power.
• Spinning reserve avoids the need to run genset inefficiently, which ensures that gensets run closer to their optimum design point.
• In Zero Emission Mode the vessel can run solely on batteries, which can be charged from shore power or another external source, or by the engines when running at optimum load.

In this mode the vessel sails on the conventional way, with the main engine driving the propeller and the auxiliary genset providing the electrical power for the hotel load; the ESS is inactive. This is the fallback mode for any vessel operation.

The main engine provides the required power to the propeller and drives the PTO to supply the electrical power for the hotel load. The auxiliary genset is inactive. The ESS is active, supporting the PTO in case of power fluctuations in propulsive or electrical load (peak shaving). The ESS is also on standby to take up the electrical load in case of a PTO malfunction (backup power) and to supplement the main engine in case of severe load ramps (immediate power).

In this operational mode, the CPP assists the management of the PTO by the main engine.

This is the most commonly used mode when sailing and can be also used in manoeuvring operations.

The PTO helps to reduce running hours for the auxiliary engine and also reduces fuel consumption and emissions because the electrical power is generated by the main engine, which is more efficient. Stable engine operation reduces fuel consumption and facilitates the use of alternative fuels that may require controlled combustion conditions.

The auxiliary genset provides the electrical power for the PTI, which works as an electric engine for propulsion. The ESS operates in peak shaving mode and the main engine is inactive. This mode is ideal both for navigation at slow speed and manoeuvring operations.

This mode allows the vessel to adjust the load of the onboard power consumers according to the energy requirements, reducing fuel consumption and emissions when the propulsive power requirement is low. Thanks to peak shaving mode, the auxiliary engine works at stable load, further reducing fuel consumption.

This mode can also be seen as a safety backup in case of a main engine failure as the vessel can navigate at a reduced speed to the nearest port.

ESS provides the electrical power for the PTI, which acts as an electric engine for propulsion and provides the electrical power for the hotel load. With the batteries covering the full electrical load, the vessel can navigate with zero emissions and reduced noise and vibration for relatively short periods of time – for example when navigating at slow speeds or during manoeuvring operations. This also reduces the running hours for the main engine and the auxiliary.

The main engine and PTI provide the required power to the propeller while the auxiliary genset provides the power for the hotel load and PTI. The ESS supports the auxiliary genset in virtual genset or peak shaving mode.

This mode can be used during navigation to allow the vessel to reach its maximum design speed under exceptional conditions while keeping the installed mechanical power to a minimum.

The main engine provides the required power to the propeller and drives the PTO, which provides the required electrical power for the hotel load and the manoeuvring thruster. The ESS is active, providing peak shaving, backup power and immediate power. The genset is inactive, reducing maintenance costs, noise and vibrations. In this mode the main propeller and the manoeuvring thrusters must work together at slow speed. Installing GATE RUDDER™ by Wärtsilä ensures excellent manoeuvring capabilities, reduces fuel consumption and improves a vessel’s noise and vibration signature.

In this mode, the electrical power is generated through the PTO by the main engine, which is more efficient, reducing fuel consumption and emissions. With a GATE RUDDER™ installed, the vessel will benefit from a smaller turning circle with higher speeds and faster crash stops, among other advantages.

In ports where a shore connection is available it can be used to power the hotel load; if it is not available then the auxiliary genset supplies the needed electrical power. The ESS provides peak shaving and charging if needed, avoiding the need to use the main engine.

The auxiliary genset is sized for the highest average load while the ESS provides peak shaving during loading/unloading, reducing fuel consumption by ensuring that the genset operates at optimal load.

The main engine provides the electrical power via the PTO and the ESS works in peak shaving or charging mode if needed. The auxiliary genset is inactive in this mode. In this backup mode, thanks to the gearbox the engine is decoupled from the propeller and used to cover the hotel load and to charge the battery if needed. This mode provides additional flexibility, for example when maintenance is being performed on the auxiliary genset.

In this mode the vessel sails on the conventional way, with the main engine driving the propeller and the auxiliary genset providing the electrical power for the hotel load; the ESS is inactive. This is the fallback mode for any vessel operation.

The main engine provides the required power to the propeller and drives the PTO to supply the electrical power for the hotel load. The auxiliary genset is inactive. The ESS is active, supporting the PTO in case of power fluctuations in propulsive or electrical load (peak shaving). The ESS is also on standby to take up the electrical load in case of a PTO malfunction (backup power) and to supplement the main engine in case of severe load ramps (immediate power).

In this operational mode, the CPP assists the management of the PTO by the main engine.

This is the most commonly used mode when sailing and can be also used in manoeuvring operations.

The PTO helps to reduce running hours for the auxiliary engine and also reduces fuel consumption and emissions because the electrical power is generated by the main engine, which is more efficient. Stable engine operation reduces fuel consumption and facilitates the use of alternative fuels that may require controlled combustion conditions.

This mode provides a safety backup in case of a main engine failure as the vessel can navigate at a reduced speed to the nearest port.

The main engine and PTI provide the required power to the propeller while the auxiliary genset provides the power for the hotel load and PTI. The ESS supports the auxiliary genset and provides peak shaving.

This mode can be used during navigation to allow the vessel to reach its maximum design speed under exceptional conditions while keeping the installed mechanical power to a minimum.

The main engine provides the required power to the propeller and drives the PTO, which provides the required electrical power for the hotel load and the manoeuvring thruster. The ESS is active, providing peak shaving, backup power and immediate power. The genset is inactive, reducing maintenance costs, noise and vibrations. In this mode the main propeller and the manoeuvring thrusters must work together at slow speed. Installing GATE RUDDER™ by Wärtsilä ensures excellent manoeuvring capabilities, reduces fuel consumption and improves a vessel’s noise and vibration signature.

In this mode, the electrical power is generated through the PTO by the main engine, which is more efficient, reducing fuel consumption and emissions. With a GATE RUDDER™ installed, the vessel will benefit from a smaller turning circle with higher speeds and faster crash stops, among other advantages.

In ports where a shore connection is available it can be used to power the hotel load; if it is not available then the auxiliary genset supplies the needed electrical power. The ESS provides peak shaving and charging if needed, avoiding the need to use the main engine.

The auxiliary genset is sized for the highest average load while the ESS provides peak shaving during loading/unloading, reducing fuel consumption by ensuring that the genset operates at optimal load.

The main engine provides the electrical power via the PTO and the ESS works in peak shaving or charging mode if needed. The auxiliary genset is inactive. In this backup mode, thanks to the gearbox the engine is decoupled from the propeller and used to cover the hotel load and to charge the battery if needed. This mode provides additional flexibility, for example when maintenance is being performed on the auxiliary genset.