ViganPort of StocktonTelestackTBA GroupCimbriaPort of South Louisiana
  • Sailors Society
  • Port of Stockton
  • Bühler GmbH
  • Vigan
  • TBA Group
  • Geneva Dry

ClassNK issues AiP for dual fuel generator engine using hydrogen gas

ClassNK issues AiP for dual fuel generator engine using hydrogen gas

(Posted on 01/12/22)

ClassNK has issued an Approval in Principle (AiP) for a dual fuel generator engine using hydrogen gas as fuel and related machinery systems and arrangements for a 160,000m3 liquefied hydrogen carrier developed by Kawasaki Heavy Industries, Ltd. (KHI). This marks ClassNK's first AiP for a dual fuel generator engine using hydrogen gas as fuel.

As hydrogen is expected to be used as a clean energy source to realize a decarbonized society, ClassNK has worked on the establishment of necessary standards and certification to contribute to its maritime transportation and marine fuel use. For the 160,000m3 liquefied hydrogen carrier developed by KHI, ClassNK has so far issued AiPs for its integrated design as well as its Cargo Containment System (CCS), Cargo Handling Systems (CHS), and dual fuel main boilers that use hydrogen boil-off gas as fuel.

In the latest examination, ClassNK carried out the design review of the dual fuel generator engines using hydrogen gas as fuel and related machinery systems and arrangements based on its Part N of Rules for the Survey and Construction of Steel Ships incorporating the IGC Code, and its Guidelines for Liquefied Hydrogen Carriers incorporating the IMO’s interim recommendations for Carriage of Liquefied Hydrogen in Bulk. In addition, a comprehensive safety assessment was conducted based on the HAZID risk assessment results, which has led to the issuance of the AiP

According to KHI, the dual fuel generator engine is capable of switching between hydrogen and low-sulfur fuel oil flexibly, and when hydrogen fuel is selected, boil-off gas naturally evaporated from the ship's liquefied hydrogen cargo tanks is used as the main fuel at a calorie - based mixed ratio of 95% or higher to generate and supply electricity in board, which is expected to reduce greenhouse gas emissions from the ship significantly.

ClassNK will actively continue to take part in advanced initiatives toward decarbonization and also support the decarbonization of the entire maritime industry by incorporating the knowledge gained through collaboration with front runners into rules and guidelines.

At the initial stage of designing or before the specific target ship etc. to be implemented is decided, the design is examined based on the existing regulations such as international treaties and ship classification rules, and an Approval in Principle (AiP) is issued as proof of conformity with requirements. It also prevents rework of regulatory aspects in the post-process, shortens the examination time at the time of class registration, and can be used as a technical basis for external appeal of the design status.

Latest News

Naples cargo operator invests in energy-efficient Konecranes Gottwald MHC

(Posted on 01/05/25)

Magazzini Generali Silos Frigoriferi (MGSF), part of the Klingenberg Group, has ordered a Konecranes... Read more


FuelEU Maritime compliance strategy is commercial priority, says OceanScore

(Posted on 28/04/25)

FuelEU Maritime represents a strategic headache for shipping companies on the same level as its technical... Read more


Wärtsilä upgrade to deliver emissions savings for Ulusoy bulk carriers

(Posted on 22/04/25)

Technology group Wärtsilä will upgrade the Wärtsilä RT-flex main engines... Read more


Steelpaint secures major order for application on 39 bulk vessels

(Posted on 22/04/25)

German coatings firm Steelpaint GmbH has secured a major order to supply its specialist Stelpant... Read more


BAR Technologies' WindWings a practical solution

(Posted on 15/04/25)

In the wake of the International Maritime Organization's (IMO) Marine Environment Protection Committee... Read more


Orderbook for all dry-bulk vessel classes falls by 26% Y-o-Y in Q1

(Posted on 15/04/25)

Global economic uncertainty and a cooling of the market has seen newbuild orders for dry-bulk vessels... Read more


Alfa Laval expands its portfolio with NRG Marine acquisition

(Posted on 03/04/25)

Alfa Laval has completed the acquisition of UK-based NRG Marine, a leading provider of ultrasonic anti... Read more


MBF and ZESTA MoU to accelerate zero-emission shipping

(Posted on 03/04/25)

In a landmark moment for the global maritime industry, the Maritime Battery Forum (MBF) and the Zero... Read more


Bruks Siwertell Group announces leadership transition

(Posted on 31/03/25)

Bruks Siwertell Group has announced a leadership transition as Peter Jonsson steps down as CEO after... Read more


ClassNK issues AiP for OceanWings Rigid Windsail Type WAPS

(Posted on 31/03/25)

ClassNK has issued an approval in principle (AiP) for a Rigid Windsail Type Wind-Assisted Propulsion... Read more


Geneva DryVan AalstTMS Awards 2023Sailors SocietyBühler GmbH
  • Telestack
  • Van Aalst
  • Port of South Louisiana

Subscribe to our newsletter

Keep up to date with the latest global news in bulk cargo handling and shipping