Over Fifty Percent Less CO2 from New Bulk Carrier


By The Maritime Executive 08-22-2018 07:34:41

ESL Shipping has taken delivery of the bulk carrier Haaga - an LNG-fuelled vessel the company says will cut carbon dioxide emissions by over 50 percent compared to earlier vessels.

The 160-meter (525-foot), 25,600dwt vessel was built by Jinling Shipyard in Nanjing, China, and flies the Portugal flag. Her main engine is a multi-fuel STX-MAN 5G45ME-C9.5-GI Tier II, 6,000 kW + PTI boost 1,250 kW, to give a total of 7,250 kW. As well as LNG, Haaga can also be fueled by completely carbon-free biogas, once the availability of carbon-free biogas improves over time.

MacGregor, part of Cargotec, developed the world's first autonomous cargo processing solution for the vessel which will transport raw materials between Japan and Baltic Sea ports, where the vessel is currently scheduled to arrive in mid-September. The Ice Class 1A vessel cost around EUR 60 million ($70 million) and is part of the Bothnia Bulk project, partly funded by the E.U. Its goal is to modernize the sea route between Luleå, Oxelösund and Raahe to be more eco-friendly. In addition, she is fitted to accept shoreside power, so environmental emissions will decrease at port with the availability of shore-side electricity. 

Haaga and her sister vessel Viikki, launched last year, are the first LNG-powered handy-size bulk carriers in the world. The vessels were designed by Deltamarin in Finland, and European equipment suppliers provided roughly 60 percent of all vessel systems.

Thermal insulation and Heat recovery
The vessels have improved thermal insulation and are equipped with an energy saving solution for their air handling unit. A heat recovery wheel reduces cooling energy consumption by 30 percent and heating energy consumption by 45 percent compared to a traditional system.

Hatch coaming heating
Heating of cargo hatch coamings enables smooth operations in cold climates.

DNV GL Clean Design notation
The notation requires special features such as 5ppm bilge water separator, biofouling management,
ODP = 0 (Ozone depletion potential) and GWP max 1300 (Global warming potential).

DNV-GL NAUT(AW) notation
Notation requirements increase maritime safety and reduce the risk of collision, grounding and heavy weather damage through enhancement of the reliability of the bridge system

All LNG-powered
All engines and boiler burner operate on LNG, and the vessels have a vacuum insulated IMO type C tank with low boil off generation rate.

Energy Efficiency Design Index (EEDI) of the vessels is approximately 50 percent below the current requirement and already fulfil 2025 requirements.

High efficiency propeller and rudder
Optimal hydrodynamic design with rudder bulb to optimize the water flow. 

Stator fins
The vessel is equipped with four stator fins to optimize the flow to the propeller and to increase propeller efficiency.

Electrical motors
In general, electrical motors of 7.5 kW and above have an energy efficiency class of IE3.

Cargo wash water recovery system
The vessels are able to re-use wash water and discharge used wash water to port facilities.

Ballast water treatment systems
Capacity two x 1,000 m3, UV-type, United States Coast Guard approved ballast treatment units.

VFD equipment
Engine room fans, BW, SW and LNG-pumps are equipped with variable frequency drive (VFD) to reduce the power consumption.

Hull coating
The hulls are painted with low friction ice-resistant paint. No harmful antifouling paint is used. Frequent hull cleaning will be performed to reduce the drag of the hull.

Hydrodynamic hull form
Extensive CFD calculations and model testing were performed to optimize hull form. The bow and stern thruster tunnel openings are provided with scallops and streamline grids. Special attention was paid to monitoring hull surface roughness during the building stage.

Permanent magnet PTI/PTO shaft generator with VFD drive
Shaft generators enable flexible and efficient operation of propulsion and power generation at sea as well as extra power for ice conditions through use of a power take in/power take out shaft generator.

Emission reduction
Reduction of direct exhaust emissions with LNG compared to 0.1 percent fuel oil:
• 57 percent for CO2  emissions
• 92 percent for SOX  emissions
• 25 percent for NOX  emissions
• 98 percent for PM emissions.