Members of the Clean Shipping Alliance (CSA) 2020 in February reported on the installation and performance of their respective exhaust gas cleaning systems during a technical seminar held in London.
A shipowner panel comprising of Grimaldi Group, Genco Shipping and Trading, and Spliethoff informed delegates that, despite initial installation problems, there had been little by way of mechanical breakdown, corrosion or non-compliant operation during scrubber operations.
All panel members said that their EGCS installations were removing substantially more sulphur emissions than the 0.50% required to comply with the global sulphur cap.
“We have not had any major problems; we don’t see any corrosion issues or any breakdown issues,” said Arne Hubregtse, technical director and a member of the Spliethoff executive board.
“We are satisfied with our decision to install scrubbers and we look forward to operating these systems for a long time. From an environmental perspective, if you look at the total picture, scrubbers are still the best intermediate solution we have until a zero-emission propulsion solution is found.”
Italy’s Grimaldi Group, which operates about 100 EGCS-fitted vessels, reported similar success.
“The company has fitted the technology to about 70% of its fleet, with installations capable of reducing sulphur emissions down to 0.10%,” said Dario Bocchetti, head of Grimaldi’s corporate energy saving and innovation department.
Bocchetti explained the decision to install the system was to “go beyond the legislation”. Grimaldi Group’s scrubber installations are achieving about 90% up-time.
Genco Shipping and Trading, which has installed open-loop EGCS to 17 Capesize bulkers, the most recent of which entered service in January, experienced similar success and highlights proper planning and maintenance as key..
“We’ve had no breakdowns. But a lot of that is due to good planning, planning for performance,” explained Capt. Robert Hughes, chief operating officer at Genco.
“You must do the mental heavy lifting ahead of time, choose the right supplier, and identify where there could be some limitations and vulnerability. We haven’t experienced any issues.”
Hughes also emphasised the importance of preventative maintenance and told delegates that Genco has elected to use an extra engineer onboard as a risk mitigation tool.
“We operate in a saltwater environment and things do rust out. If you’re working on anything in the marine environment, it will break down, so you need to have a plan of action in place as you would with any system,” advised Hugh.
“Ultimately the goal here is investing in a well-trained crew united in their focus on cleaner emissions.”
With exhaust gas cleaning systems weighing between 10t and 100t and taking up additional space, ship stability and cargo capacity must be carefully assessed.
However, the panellists advised that only in limited cases, say on some smaller vessels, alternative emissions reducing technology may be the better option.
Bocchetti suggested that there can be some cargo capacity loss, but any losses would be significantly more with an LNG retrofit. He said that retrofitting scrubbers has almost always been possible for about 90% of the company’s vessels.
Spliethoff, which has a variety of ro-ro, multipurpose vessels, and heavy lift vessels fitted out with EGCS has, in some cases sacrificed a fuel tank to create more space for installation.
“Apart from a minor deadweight reduction we do not see any impact on cargo capability,” said Hubregtse.
The panellists went on to explain how Port State Control authorities are policing the IMO2020 requirement, following its entry-into-force in January.
“They are keen to come on board and have a tour of the system,” said Hughes.
“They are very keen to understand the different systems and technologies out there and see how they work. They are interested in seeing how it’s done in China, in Singapore, in Australia, the Americas.”
“It’s all part of [the IMO2020] journey. That one vision. That one focus on improving global air quality.”
“So, although some ports may have restrictions about using open loop scrubbers, it is important that we demonstrate what’s going on, demonstrate how the technology works, and explain the science behind it. It is important to communicate that as a community.”
Photo credit: Clean Shipping Alliance
Date: 3 March, 2020
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