Environmental compliance
Emission Reduction
Meet today’s NOx limits with the engine you have.
Emission rules for ships and power plants are getting stricter every year. We help existing diesel engines meet them, without a new engine and without a dry dock.
The challenge
Emission rules are getting stricter
IMO Tier III. In emission control areas, strict NOx limits apply to ship engines.
CII rating. Since 2023, ships over 5,000 GT receive a yearly carbon intensity rating from A to E.
Action plan. Ships rated D or E must present a plan to improve.
Sample of 1,831 container ships (EU MRV, 2019): around 90 % will need to adapt to keep a rating of C or better by 2030.
Your options
Three ways to cut NOx
For an existing engine there are three common routes. They differ a lot in effort and cost.
| Exhaust Gas Recirculation (E.G.R.) | SCR catalyst | Conversion to LNG or dual fuel | |
|---|---|---|---|
| Consumables | Technical water | Urea | New fuel supply |
| Dry dock | Not needed | Usually needed | Needed |
| Space | On top of the engine | Large, often a funnel extension | Tanks and piping |
| Example cost | About 1.1 million € | About 1.8 million € | About 10.2 million € |
Example costs from one case study: 1,000 TEU container feeder with one 9 MW main engine, from IMO Tier II to Tier III. Every project is calculated individually.
Our approach
How exhaust gas recirculation works
The idea is simple: cooler combustion produces less NOx.
1 · Take exhaust gas
Part of the exhaust gas is taken off, depending on engine load.
2 · Cool and clean
Water cools and cleans the gas.
3 · Return to scavenging Air
The gas goes back into the intake air. Combustion runs cooler and much less NOx is formed.
Real-world proof
Tested at sea
MS Artania
Cruise liner for 1,200 passengers with four Wärtsilä engines of 7 MW each. Installed on all four engines in 2023: NOx reduced by about 80 %, from IMO Tier II to Tier III.
DNV class approval in principle · Listed supplier at the Norwegian NOx Fund · New EIAPP certificate for MS Artania issued by Lloyd’s Register in July 2024
The product
Our solution: blueEGR
Exhaust gas recirculation for marine and stationary diesel engines from 500 kW. Variants, set-up and technical data are on the product page.
How we work
From first check to certified engine
1 · Pre-study
We check your engine and your target Tier level.
2 · Design
The system is sized for your engine.
3 · Install
In port. The engine is needed for only a few hours to connect the system.
4 · Certify
We support you with class and the new certificate.
Questions we hear
Your questions, answered
Do I need a dry dock?
No. The system is installed in port, and the engine is needed for only a few hours to connect it.
Does it need urea or chemicals?
No. It uses technical water only, so there is no urea, no ammonia slip and no compressed air.
Which engines does it work with?
Marine and stationary diesel engines from about 500 kW. We check your engine type before we make an offer.
What about class and certificates?
We support you with the class society. For MS Artania, Lloyd’s Register issued a new Technical File and EIAPP certificate.
Contact
Talk to us about your emissions
Send us your engine type, your current Tier level and the size of your ship or plant. We check what is possible and what it would cost.
Every engine is different. Figures on this page come from individual projects and are not a guarantee.
Our solutions
Explore our solutions
From the first pre-study to cleaner, more efficient engines and power from the water: find the solution that fits your project.