- KHI obtains AiP from ClassNK for a cargo containment system (CCS) offering the world’s largest capacity developed for use on a large liquefied hydrogen carrier.
- The CCS for which the AiP was obtained is designed to contain cryogenic liquefied hydrogen.
- This containment system has the largest capacity of its kind worldwide used in liquefied hydrogen marine transport.
Japan-based classification society ClassNK, in their press release, has issued an Approval in Principle to Kawasaki Heavy Industries for the design of a cargo containment system for the world’s largest liquefied hydrogen carrier.
Design to contain cryogenic hydrogen
The CCS for which the AiP was obtained is designed to contain cryogenic liquefied hydrogen, reduced to a temperature of –253°C and one eight-hundredth its initial volume, for shipping by sea in large amounts.
This containment system is said to have the largest capacity of its kind worldwide used in liquefied hydrogen marine transport.
New insulation service
The CCS was developed using design, construction and safety technologies fostered through building of the Suiso Frontier, a pioneering liquefied hydrogen carrier built by Kawasaki that boasts a 1,250 cbm carrying capacity. In addition, the CCS utilizes a new type of insulation structure.
Further on, ClassNK has confirmed that KHI’s CCS satisfied the IGC Code and the IMO’s Interim Recommendations for Carriage of Liquefied Hydrogen in Bulk, also clearing HAZID risk assessment and class regulations.
CCS main features
The main features of the CCS are as follows:
- Enables transportation of cryogenic liquefied hydrogen in large amounts thanks to tank capacity on par with tanks used on large liquefied natural gas (LNG) carriers;
- Utilizes an independent, self-supporting design with a structure capable of responding flexibly to thermal contraction that occurs when loading cryogenic liquefied hydrogen;
- Features a newly developed, high-performance heat insulation system that mitigates boil-off gas (BOG) which occurs in response to heat ingress;
- Designed to effectively utilize BOG as fuel to power the ship, thus contributing to reduced CO2 emissions from liquefied hydrogen transport operations.
Earlier on, the company has pulled out all the stops by forming a consortium with two other Japanese engine manufacturers, Yanmar Power Technology and Japan Engine Corporation, to develop hydrogen-fuelled marine engines and contribute to the Japanese shipbuilding industry.
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Source: ClassNK
