Green Dolphin

Norwegian Det Norske Veritas (DNV) has collaborated with Shanghai Merchant Ship Design & Research Institute (SDARI) to introduce the Green Dolphin 575 concept design for a handymax bulk carrier.

The new concept is the second for the company following its handysize Green Dolphin 38 vessel.

Green Dolphin 575 is a 190m long handymax bulk carrier with five cargo holds. It is compliant with common structural rules (CSR) and available in single hull standard or double-hull (open hatch) configurations.

The hull of the new vessel is similar to that of the Green Dolphin 38 but with added resistance for improved performance.

It is tested in waves through model testing and calculations to check the resistance on a given trade route. An operating profile consisting of full load and ballast conditions at service and slow-steaming speeds was evaluated.

DNV bulk carriers segment director Michael Aasland said that these design imperatives were chosen based on an extensive market analysis together with input from many ship owners and ship operators.

"We have achieved a design that has an EEDI rating 20% below the IMO reference line for bulk carriers, and in keeping with IMO imperatives, the vessel is prepared for shaft torque and fuel consumption monitoring systems that support SEEMP and EEOI requirements," Aasland added.

Aasland also noted that the engine configuration and emission-reduction technologies have been carefully evaluated.

The core design features a tier II long-stroke, low-speed main engine and a large-diameter slow-rotating propeller.

The ship is built for cold ironing, and the four electric deck cranes with variable frequency drives will perform cargo handling operations.

Other features of the vessel include a citadel for crew protection and compliance with the revised code on noise levels on board ships.

The new vessel complies with current and future expected local and global emission regulations through a switch to low-sulphur fuels, the installation of exhaust-gas cleaning systems or dual-fuel operation with LNG.

Following the launch, SDARI will carry out basic and detailed design to move the concept towards production. DNV will carry out approval inprinciple.

Image: The Green Dolphin 575 is a 190m-long handymax bulk carrier with five cargo holds. Photo: courtesy of Det Norske Veritas.