Sustainable fuel strategy
Van Oord has ordered two 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). Each has a hopper capacity of approximately 10,500 m3 and measures 138 metres in length and 28 metres across the beam. The order is in line with Van Oord's innovative investment programme. The new hoppers will replace existing vessels and fit in with Van Oord’s aim of making its fleet more economical and energy efficient. Both vessels will be delivered in 2021.
What is the improvement with LNG ?
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 two hoppers, we’ll be gaining more experience of using LNG as an alternative fuel for this category of dredging equipment.
Van Oord’s engineering team paid special attention to the vessels’ energy efficiency. As we already noted, LNG is natural gas cooled down to -162 °C. In order to use it 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. Both 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. The new vessels will be equipped with innovative and sustainable systems and will obtain a Green Passport and Clean Ship Notation. Van Oord has designed the vessels in-house in cooperation with the Dutch firm of DEKC Maritime.
Related U.N. Sustainable Development Goals
- affordable clean energy
- industry innovation infrastructure
- climate action