Ship Decarbonization Services
Ship decarbonization services from Elomatic — alternative fuels analysis, energy saving measures, and EEDI/EEXI/CII compliance support for shipowners worldwide.
Decarbonizing a vessel or a fleet is not a single decision. It involves fuel strategy, retrofit planning, regulatory reporting, and engineering trade-offs that differ for every ship type and trade route. We help you work through that complexity with analysis grounded in real operating conditions.
Key Takeaways
- Elomatic provides decarbonization services covering alternative fuels assessment, energy saving solutions, and EEDI, EEXI, and CII regulatory compliance.
- We assess the technical and operational feasibility of ammonia, methanol, hydrogen, and LNG for both newbuilds and retrofit projects using well-to-wake analysis.
- Our energy saving analysis identifies measures that reduce fuel consumption without requiring full vessel redesign.
- We calculate and document EEDI, EEXI, and CII ratings and advise on how to improve them to meet current and upcoming IMO requirements.
- We have supported projects targeting up to 70% lower energy demand compared to conventional vessel designs.
Alternative and future fuels
Are you exploring a switch to ammonia, methanol, or hydrogen? Or evaluating LNG as a transition fuel? We help you assess what is technically and commercially viable for your specific vessel type and operation.
We use well-to-wake analysis to evaluate each fuel’s actual carbon footprint across its full supply chain. The right choice depends heavily on the vessel’s trade route, operational profile, and the availability of bunkering infrastructure at the ports you call.
Our fuel feasibility studies cover tank arrangements, machinery system modifications, safety requirements, and class approval pathways. For newbuilds, we integrate fuel system design from concept stage. For operating vessels, we assess conversion scope and cost against the projected operational benefit. We have contributed to concept studies targeting zero emissions, including work with NYK and MTI on a future pure car and truck carrier with 35% lower ship resistance and 70% lower energy demand.
Fuels we work with
- Ammonia: zero-carbon fuel with specific safety and system challenges
- Methanol: increasingly available, with lower infrastructure barriers than hydrogen
- Hydrogen: relevant for short-sea and ferry segments
- LNG: established pathway for reducing SOx and NOx emissions as a transition step
- E-fuels and synthetic fuels: feasibility assessment for future-proof newbuild concepts
E-fuel production and the full value chain
Choosing the right fuel is only part of the picture. We also help clients understand the full value chain – from offshore renewable energy production through to e-fuel distribution and utilization onboard. This includes ammonia, hydrogen, methane, and methanol applications, as well as offshore infrastructure for e-fuel production and ship refueling.
This expertise sits within our broader offshore renewables work.
Energy Saving and Emission Control
Many meaningful emission reductions are achievable without changing fuel. We analyze operational patterns, hull and propulsion performance, and onboard systems to identify where energy is being lost and how to recover it.
Our CFD and hydrodynamics capabilities support hull optimization, appendage analysis, and air lubrication assessment. For power production, we focus on power management and can enhance efficiency further through waste heat recovery and energy stream optimization. Battery packs are assessed where peak shaving offers a clear operational benefit. Where applicable, we also evaluate wind-assisted propulsion solutions, which can meaningfully reduce main engine load on suitable routes and vessel types.
Every measure is assessed in terms of its actual impact on CII rating and operating cost.
Typical energy saving measures:
- Hull form optimization and bulbous bow modification
- Propulsion efficiency improvements including Elogrid for tunnel thruster installations
- Air lubrication system optimization and validation
- Battery packs for peak shaving and hybrid power management
- Wind-assisted propulsion (WASP) assessment for suitable vessel types and routes
- Waste heat recovery and energy stream optimization
- Voyage simulation, speed optimization, and trim analysis
Regulatory Compliance: EEDI, EEXI, and CII
The IMO’s decarbonization framework is built around three key metrics: EEDI for newbuilds, EEXI for existing ships, and CII for operational performance. Meeting or improving these ratings requires both technical understanding and accurate documentation.
We calculate EEDI and EEXI values and identify what design or machinery changes are needed to meet required levels. For CII, we help you understand your current rating, model future trajectories, and plan operational or technical measures to improve it before the annual reporting cycle.
What we cover:
- EEDI calculation and verification support for newbuilds
- EEXI assessment and corrective measure identification for existing vessels
- CII rating analysis, trajectory modelling, and improvement planning
- Stakeholder documentation for class societies and flag states
- EU ETS compliance support and carbon intensity analysis
Frequently asked questions
EEDI (Energy Efficiency Design Index) applies to newbuild vessels and measures the carbon efficiency of the ship design. EEXI (Energy Efficiency Existing Ship Index) is a one-time compliance requirement for ships already in service. CII (Carbon Intensity Indicator) is an annual operational rating that tracks actual emissions relative to transport work. All three are IMO requirements under MARPOL Annex VI.
Yes. We work on newbuild projects from concept stage, where fuel system and hull design choices have the most impact. For operating vessels, we assess retrofit options including fuel conversion, propulsion upgrades, and energy saving measures, and calculate the effect on EEXI and CII ratings.
We use well-to-wake analysis to evaluate the full carbon footprint of each fuel option, then look at the vessel type, trade route, bunkering infrastructure, class requirements, and operational profile together. Each alternative fuel has different implications for tank volume, safety systems, and machinery modifications. We produce a technical feasibility study that gives you a realistic picture of what a conversion or newbuild design would involve.
We start with an analysis of the vessel’s current CII rating and the factors driving it. The plan typically combines short-term operational measures (speed and trim optimization, voyage planning) with medium-term technical measures (propulsion improvements, waste heat recovery, battery systems). We model the combined effect to show what rating is achievable and when.
Yes. We prepare and support the technical documentation required for EEDI, EEXI, and CII submissions to classification societies and flag state administrations. We have experience working with the major classification societies across different flag state jurisdictions.
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