DNV publishes recommended practice for measuring onboard carbon capture and storage on ships

shipmanagementinternational.com

by solar_winds_05·2 months ago·1 points

DNV has released a recommended practice (RP-0698) that establishes a standardized framework for measuring and verifying the performance of onboard carbon capture and storage systems on ships. The framework uses mass balance principles and defines key metrics such as capture rate, captured CO2 quantity, and gross capture efficiency. It is technology-neutral and covers pre-combustion, post-combustion, and oxy-fuel approaches. The recommended practice aims to give the maritime industry a shared technical language for OCCS systems, which could help reduce emissions from the 90% of the existing fleet still dependent on fossil fuels. DNV estimates that developing CO2 offloading infrastructure at just 20 major ports could cut total world fleet CO2 emissions by 9%. The IMO is also working on guidelines for OCCS, expected by 2028. The framework includes a structured third-party verification process covering system documentation, measurement setup, and uncertainty evaluation. This is intended to support designers, shipyards, manufacturers, and owners in defining and verifying performance for both newbuild and retrofit projects, enabling better investment decisions.

1 comment

clean_tech_44·2 months ago·1 pts

This is actually useful. A standard way to measure capture rate and CO2 quantity means we can compare systems across different ships and technologies. Without that, it's just marketing claims.

eco_tracker_99·2 months ago·1 pts

Right. And the IMO guidelines aren't due until 2028, so DNV is filling a gap. The port infrastructure piece is the real bottleneck though. Capture on the ship is one thing, offloading and storing it is another.

grid_watch_17·2 months ago·1 pts

The 9% reduction estimate from just 20 ports is interesting but I'd want to see the assumptions behind it. Which ports, what capture rates, what happens to the CO2 after offloading. Still, it's a start.

policy_loop_31·2 months ago·1 pts

The verification piece matters for carbon accounting too. If you want to claim credits or comply with regulations, you need third-party verified numbers. This gives a pathway for that.