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Van Oord has ordered three new trailing suction hopper dredgers. These vessels will be powered by dual fuel engines, meaning they can run on conventional MGO (Marine Gas Oil) but also on LNG (Liquefied Natural Gas). . The order is in line with Van Oord's innovative investment programme. The first two vessels, Vox Ariane and Vox Apolonia, will be delivered in 2021. The third vessel will be delivered in 2022.

What is the improvement with LNG ?

The new hoppers will replace existing vessels and fit in with Van Oord’s aim of making its fleet more economical and energy efficient. LNG is Natural Gas cooled down to -162 °C, liquefying it and making it easier to use and more economical. LNG fuel is free of sulphur and particulates, meaning that no harmful emissions are released into the atmosphere. The combustion process is also different to that of MGO, resulting in far less nitrogen dioxide being emitted. As a result of these emission reductions, the new LNG trailing suction hopper dredgers will comply with IMO Tier 3.

 

These state-of-the-art vessels will boost the mid-class section of our fleet of trailing suction hopper dredgers. In 2018, we launched our first LNG-powered crane vessel. By investing in these three hoppers, we’ll be gaining more experience of using LNG as an alternative fuel for this category of dredging equipment.

Jolanda Poots-Bijl, Chief Financial Officer
Jolanda Poots-Bijl, Chief Financial Officer

Energy efficiency

Van Oord’s engineering team paid special attention to the vessels’ energy efficiency. In order to use LNG in the engines, it first has to be heated up and transformed into gas again. Instead of simply wasting the cold, it is used for the air-conditioning and the freezer room, saving up to 300 kW per second. Conversely, the heat in the cooling water and exhaust gas of the engines is used for the central heating system aboard the vessel. All three hoppers qualify as Tier III vessels (IMO emission standards) and will be fitted with Dual Fuel engines. The design includes several features that will bring about a considerable reduction in fuel consumption and carbon emissions. Van Oord has designed the vessels in-house in cooperation with the Dutch firm of DEKC Maritime.  

Technical specifications

Each has a hopper capacity of approximately 10,500 m3 and measures 138 metres in length and 28 metres across the beam. Each vessel will be equipped with a suction pipe with submerged e-driven dredge pump, two shore discharge dredge pumps, five bottom doors, and a total installed power of 14,500 kW. They will have accommodation for 22 persons. 

Related U.N. Sustainable Development Goals

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