Anthony Veder develops green fleet


Dutch Anthony Veder has received two new vessels to its fleet that will enhance its environmental efficiency operating profile whilst also cutting costs


and were constructed at Avic Dingheng Shipbuilding, China. The two vessels will carry liquefied ethylene gas (LEG) from SABIC’s Wilton facility on Teeside to manufacturing plants in North-West Europe and Scandinavia. 2012 saw Anthony Veder receive its


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first dual-fuel LNG carrier Coral Energy. However, these latest two vessels will be powered by LNG. Coral Methane is a combined LNG/LEG/LPG carrier, when operating in LNG mode, the vessel can sail on the boil off gas of the cargo whereas Coral Star and Coral Sticho are LEG/ LPG carriers. Tese vessels run on LNG by virtue of the installation of a fuel gas package, consisting of two LNG bunker tanks, and associated equipment. The engine concept has also been


modified. Coral Methane has two engine rooms, one for liquid fuel engines, and one for gas fuelled engines. Coral Star and Coral Sticho are equipped with dual fuel engines, capable of running on liquid fuel or gaseous fuel, the gas supply to the engine is via double walled piping for


he two latest vessels, Coral Star and Coral Sticho, were launched at the end of last year


safe gas supply. Te double walled piping, as well as the engine design itself allows engine operations to be conducted in a similar way to conventional engines. “Te primary reason is our belief in


LNG for the future. Emissions of NOx, SOx, particulate matter and CO2


are


reduced or negligible. Our crews are fully trained to operate vessels with gas”, explains Machiel Mastenbroek, naval architect, Anthony Veder. He adds that by using LNG additional


equipment has been limited when looking at alternative green solutions such as scrubbers. “Furthermore, closed loop scrubbers


require a high load of base chemicals sodium hydroxide, and consequent handling by the crew of these chemicals”, Mastenbroek says. Although LNG bunker tanks require space, it is comparable to scrubber equipment, Sodium Hydroxide storage, and tanks for technical water, waste water and handling tanks, required for the operation of a scrubber. Te benefit for LNG fuel tanks on our vessels is their lower centre of gravity compared to scrubbers. Further to this, the vessels have a more


modern design that will make them more sustainable in the future when compared to


Coral Star the first in the series of LNG powered vessels for Anthony Veder


older vessels, including those that have been designed based on hydrodynamics and have cleaner engines, the company says. Te vessel design has been optimised for


low fuel consumption and features what the company calls an eco-hull. Special attention was paid during the design and model testing to the hull efficiency, including the design of the bulbous bow. Te vessels have been laid out with a shaſt


generator offering power under normal sailing conditions, in order to reduce the running hours of auxiliary engines (that have higher SFOC/kW). Te engine selection was optimised with


loading cases, to such extent that by clever combinations a Wärtsilä 6L34DF could be selected, instead of a 9L34DF, further reducing off-load design and emissions. Te vessels are equipped with waste-heat recovery systems to increase fuel efficiency. Te use of box-coolers reduces the required pumping capacity for cooling systems, and consequent electrical load. Coral Star and Coral Sticho were


delivered in July and September 2014, respectively. Te vessels sailed from China to Europe for gas trials where aſter they now fully operate on LNG. NA


The Naval Architect January 2015


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