ABS has issued an approval in principle (AiP) to Hanwha Ocean for its design of a liquified natural gas carrier (LNGC) equipped with an ammonia-fuelled gas turbine.
At the same time, ABS issued an AiP to Hanwha Power Systems for its supercritical carbon dioxide (sCO2) power system. Efficiency improvements are reported as a result of using sCO2 as a working fluid in the turbine.
The 174,000m3 vessel would be the first carbon emission free LNG carrier. The LNG carrier can use ammonia and natural gas separately or simultaneously as fuel. If only ammonia is used as fuel, no carbon gas is emitted. The design, which is smaller than a diesel engine, incorporates Hanwha Power Systems’ exhaust gas waste heat recovery system (sCO2 Power System). Hanwha Ocean also says the system meets the nitrogen oxide (NOx) requirement without selective catalytic reduction (SCR) regardless of fuel and has significantly reduced methane slip.
Panos Koutsourakis, ABS VP Global Sustainability said: “With a global focus on decarbonization, this vessel design represents a big step forward in the shipping industry’s ambitions for zero-carbon cargo transport. ABS is proud to be able to support it and use our deep decarbonization expertise to advance a more sustainable industry.”
A Hanwha Ocean statement read: “Carbon neutrality is a ‘challenge to be overcome’ and an ‘opportunity to leap’ for shipyards. With this AiP, we will lead the competition for carbon-free ships.”