03 Solution Three

PTI-Boost Mode

Boost Mode

Shaft Generator as a motor for boosting the Main Engine in demanding conditions or low load optimised Main Engine.

Technologies Used

  • WE Drive®
  • Shaft Generator/Motor
  • Energy Management System

Customer Benefits

  • Substantial fuel savings and reduced capital expenditure, ice-boost and low load optimisation of the Main Engine.

Options

  • Energy Storage Solutions
  • Shore Power Solution

How it Works

Direct Drive Permanent Magnet Shaft Generator for 2-stroke (slow speed) applications

The permanent magnet rotor is mounted on the intermediate shaft of the propulsion system. Mass and inertia are very low and thus the impact on propulsion system torsional vibration calculations (TVC) remains minimal. No additional bearings are required, thus the propeller shaft system design remains uncompromised. The generator housing, consisting of a compact, feet mounted stator package, including the rotor and intermediate shaft, is positioned on the generator bed in the propeller shaft line and connected via flanges.

For 4-stroke (medium speed) applications

Solution Three provides auxiliary power to boost the Main Engine when the application finds itself in demanding situations, such as high bollard pull or sailing in icy condition. This solution can also be used for economical slow steaming with the single Main Engine in a twin-shaft installation. With the Boost Mode solution taken into account during the ship’s design phase, the total operation cost of a vessel can be much reduced compared with traditional propulsion machinery design. This is because the Main Engine size can be optimised to the propulsion power needed under normal conditions. Additional power boost is taken from the Auxiliary Generators as required. This solution enables Boost Mode for any vessel type by running the WE Drive® in Power Take In (PTI) mode. Solution Three also offers the functionality as outlined in Solution One.

Solutions towards Zero Emission Shipping

WE equip your ship for success.

Our solutions build on widely proven technologies and are applicable for most ship types and propulsion machinery (e.g. low speed direct driven propeller with 2-stroke Main Engine, or medium speed reduction gear driven propeller with 4-stroke Main Engine). 

WE Tech solutions utilise variable frequency drive technology (WE Drive®), permanent magnet generator technology, DC-link power distribution and Energy Management System(EMS).

With our domain expertise, you can get a ship with an energy system built the way it should.

Variable frequency drive technology for generator/motor applications is a compact and robust modular design.

The variable speed permanent magnet generator is lightweight, and compact-sized with the highest efficiency over the full speed and power range. It is virtually maintenance-free. We also offer solutions based on synchronous and asynchronous generator technology.

We use the latest lithium-ion technology from the Energy Storage System (ESS) suppliers. With a DC-DC converter, we integrate the ESS into our solution.

With the Energy Management System(EMS), we control various operation modes of the ship as well as start/stop sequences, etc. The EMS also interfaces with other control systems on board a ship.

Shore power is conditioned for the vessels’ electrical system via the WE Drive®. Vessels become unaffected by the variations in voltages and frequencies of the national power grids worldwide – shore power is always matching.

Fuel Cell Integration via DC/DC conversion to the ship energy efficient power distribution system. Seamless operations utilising Fuel Cells and ESS combinations for zero emission power.

Reference cases

Solutions applied on over 150 vessels worldwide

We have been focusing on lowering emissions for years by providing cost-effective and sustainable lifetime solutions to the shipping industry. Our benchmarking solutions have already been applied to more than 150 vessels worldwide.

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