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Generating fuel savings

Shaft generator systems to provide power take-off for LNG Carrier vessels

Technology group Wärtsilä is to supply four shaft generator systems to provide power take-off from the main engines for two LNG Carrier vessels, which should deliver fuel savings and efficiency gains

December 20, 2021

The ships are being built at the Hyundai Heavy Industries (HHI) shipyard in Korea for the Greek ship management service provider Capital Gas Ship Management Corp. The order with Wärtsilä was placed in August this year.


By enabling power take-off, the systems allow the main engine to generate electricity for onboard use, thereby reducing fuel consumption, lowering emission levels, and improving both the vessels’ Energy Efficiency Design Index (EEDI) and future Carbon Intensity Index (CII).


“In aiming to continue improving our fleet efficiency and reduce our environmental footprint, we have decided to adopt the latest available technologies. The installation of advanced shaft generator systems was one of the investments we are making in this direction,” says Miltos Zisis, Managing Director of Capital Gas Ship Management Corp.


Each of the two 174,000 cubic metre capacity vessels will be fitted with two 1.9 MW Wärtsilä shaft generators. The equipment is scheduled for delivery to the yard in 2022.

Using behavioural science to reduce carbon emissions
Bernhard Schulte Shipmanagement (BSM) Germany has formed a strategic partnership with London-based software start-up Signol that aims to use behaviour-based data science to reduce fuel consumption and carbon emissions.


The two companies are exploring how giving personalised performance feedback to its masters and chief engineers can positively impact their behaviour in selecting the optimum speed for the vessel and ultimately lead to more fuel-efficient voyages. BSM’s operational data analytics per vessel are combined with behavioural science in a dedicated app built by Signol, creating personalised targets and feedback for each crew member.

“Whilst shipping is the most efficient means of global transport with the lowest carbon emissions, we at BSM believe that the potential for improvement in this field is still immense,” says Nick Topham, Managing Director at BSM Germany. “By introducing our crew to the direct impact of their actions, we hope that we can drive them to make measurable fuel and CO2 savings.”


More than 60 masters and chief engineers on 28 vessels are taking part in a pilot project that started in August. Over a period of six months, each participating crew member is receiving individualised targets via the Signol app which are calculated based on the crew’s recent performance. Every week, the participating seafarers will obtain updates on personal milestones and achievements via the app and email. They can digitally review their voyages and the progress they have made on fuel efficiency and submit their personal feedback via the app, which will contribute towards further improving the solution.


According to BSM and Signol, the use of the app is intended to not only improve crew decisions with regards fuel consumption, but boost seafarer morale and well-being onboard due to ongoing communication and personal interaction.


“Our studies have shown that changing the master’s behaviour alone could result in over 5% lower fuel usage as well as in much higher job satisfaction by giving employees a sense of empowerment,” says Dan White, CEO and Co-Founder at Signol.


“Achieving carbon neutrality requires structural and incremental change and can only be achieved if corporations act in unison,” added Topham. “That is why BSM is forming strategic partnerships worldwide to develop and implement innovative solutions that monitor and mitigate the environmental impact of our managed fleet.”

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