DNV GL released an announcement in which it mentions that the consortium of the PERFECt ship project (Piston Engine Room Free Efficient Container Ship) presented the results of the project in December, during MARINTEC fair in Shanghai.
In MARINTEC, DNV GL provided an overview of PERFECt ship project, while project partners ABB, GTT, Caterpillar Solar Turbines and OMT presented their specific project contributions.
The results show that the combined gas turbine and steam turbine integrated electric drive system (COGES) proposed for the 20,000 TEU class containership of the PERFECt Ship project is competitive compared to oil or LNG fueled ships with piston engines.
In June, the project partners presented the results of phase II of the PERFECt joint industry project (JIP), which validated the phase I results and developed the concept to a “ready to order” stage.
The concept can also be applied to other ships with a power of 30 MW and above. Specifically, cruise ships with electrical drive will benefit from this concept, as it combines high efficient gas turbines with a state of the art steam turbine cycle.
It was also emphasized that the system proposed is a high end state of the art COGES system, which uses shelf technology. For that reason the PERFECt Ship can be ordered without the need of additional technology development.
Power distribution
The aim is to provide a minimum number of power generating sets (or gen-sets), most of them being identical and all of them able to run in parallel in load sharing mode. This allows for the higher load of operation of the gen-sets during operating modes with small power requirements, which effectively increases the system’s efficiency. The advantage of having identical gen-sets is mainly related to cost savings for maintenance (consumable, management of spare parts, etc.), the training of crew and adjustment of parameters in the various running modes.
Number, type and capacity of gen-sets
The electrical power generation is adapted to the required power demand and considers the operating profile of the ship.
Dynamics in the power demand of the ship
The architecture of the power-generating system considers the fast reaction time needed to increase or decrease the power even when such changes occur abruptly.
