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By: Jeroen Berger, May 17, 2018 (updated) On Friday 13th April 2018, the International Maritime Organisation (IMO) has reached an international agreement on climate action to reduce CO2 by the maritime shipping sector. Worldwide, this sector accounts for 2.5 per cent of all greenhouse gas emissions. The 173 IMO Member States have agreed that by 2050, total CO2 emissions by international shipping must be halved vis-à-vis 2008. Whereupon the maritime transport must go fully climate-neutral as soon as possible. In order to achieve these goals, an interim step has been set down: by 2030, ship-sourced CO2 emissions must be reduced by an average of 40 per cent.
To reduce the ship-sourced CO2 emissions to zero, the IMO has set down further actions to make newbuilding vessels more energy efficient. For example, the further tightening of the standards of the Energy Efficiency Design Index (EEDI).
Solutions to reduce CO2
In anticipation of the international agreement on climate action to reduce CO2, Berger Maritiem has added a new innovation to his package of sustainable solutions a year ago: the efficiency PACK (waste heat recovery system) from the German company Orcan Energy AG (see figure 1).
This technology produces electrical or mechanical energy (to support the powertrain) by using the waste heat from the exhaust gas, cooling water, residual steam or thermal oil. Thanks to this solution a ship owner or shipping company is able to reduce yearly their CO2 footprint till 300 tonnes, save on their fuel costs (6-9%) and improve the Energy Efficiency Design Index (EEDI).
Because the efficiency PACK continuously measures the recovered electrical or mechanical energy in kW net, a ship owner or shipping company can calculate and prove how many CO2 (and fuel costs) is saved.
Figure 1: efficiency PACK (waste heat recovery system) from Orcan Energy AG
Improving the hydrodynamic performance of a vessel, is another measure to reduce the CO2 footprint. To get the insights, Berger Maritiem makes use of the knowledge and expertise from VICUSdt, established in Vigo (Spain). This independent player of design and engineering services makes use of advanced Computational Fluid Dynamics (CFD) technology (see figure 2).
By making use of this technology, the flow and resistance of a vessel can be calculated to investigate where improvements can be done. Thanks to this scientific approach, the calculated CO2 reduction (and fuel cost savings) can be made provable.
Figure 2: Computational Fluid Dynamics (CFD) technology
It is our expectation that more CO2 reducing technologies will follow over the years. Berger Maritiem is following the latest developments. We will inform you in case more techniques are available.
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Climate agreement to reduce CO2 by maritime shipping sector
