Maritime technology group Wärtsilä on Tuesday (22 September) said it would like to refer its customers to a recent report from CE Delft, an independent research and consultancy organisation, regarding the climate impact of EGCs. The study compares the results to the use of low-sulphur marine fuels and is made from a well-to-wake perspective in order to achieve an accurate comparison.
The report concludes that the environmental impact of EGCs will be less than that of low-sulphur marine fuel, said Wärtsilä.
It notes that CO2 emissions associated with producing and installing an EGC system are small compared to those generated when operating the system. The CO2 emissions are mainly related to the energy demand of the system’s pumps, which typically result in a total increase in CO2 emissions of between 1.5 and 3%.
By contrast, with de-sulphurised fuels the overall CO2 footprint increase is a result of the refining processes. Theoretical calculations range from an increase in CO2 emissions of 1 % to as much as 25% when removing the sulphur content of the fuel.
The report states that while the lower figure is not in fact physically possible, the higher %age increase is applicable only to a quality of fuel that is too high for marine applications.
The conclusion, therefore, is that the CO2 emissions associated with the production of low-sulphur marine fuels will be between these extreme values, as illustrated in the attached image, nnoted Wärtsilä.
“This study provides a comprehensive overview of the climate impacts of different options to reduce sulphur emissions. It shows that in many cases, the carbon footprint of using a scrubber is lower than low-sulphur fuels,” said Jasper Faber, Project Manager at CE Delft.
“Wärtsilä has consistently demonstrated its commitment to minimising the marine sector’s carbon footprint. This shows not only in our products and systems, but also in our manufacturing and production processes,” commented Jan Othman, Vice President, Exhaust Treatment.
“We are delighted that this independent report confirms that when taking all things into consideration, our EGCs create less CO2 emissions than the use of sulphur-compliant fuel.”
Research has indicated that greenhouse gas (GHG) emissions from shipping have increased by more than 10 % in the last five years. These emissions are projected to increase by up to 50 % by 2050, which means that if the International Maritime Organization’s goal to significantly lower the industry’s GHG emissions is to be achieved, scrutiny of all aspects of shipping is necessary.
Photo credit: Wärtsilä
Published: 23 September, 2020
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