DNV grants AiP for 21,700 TEU ammonia-dual-fuel container ship design

New ammonia-dual-fuel container ship concept offers high-capacity, zero-carbon shipping.

DNV has awarded an Approval in Principle (AiP) to the joint consortium of MSC, Zhoushan Changhong International, and CIMC ORIC for a new 21,700 twenty-foot equivalent unit (TEU) ammonia-dual-fuelled ultra-large container ship design.

In a statement, DNV said the award of the AiP lays the groundwork for more detailed engineering studies and potentially commercial construction to its class rules.

The proposed 21,700 TEU container ship integrates the latest-generation of ammonia dual-fuel main engines alongside oversized C-type ammonia tanks. The hull design features a new vertical bow, optimised stern, and hull lines, alongside low-resistance coatings, high-efficiency propellers, and energy-saving hydrodynamic.

DNV’s classification experts have reviewed the concept design against the relevant DNV and international standards, including fuel system (ammonia tank and handling), propulsion arrangement, safety and mitigation systems for ammonia.

“This vessel concept offers shipowners an option for high-capacity, energy-efficient, zero-carbon container ship as part of the next-generation sustainable global liner services,” said Yin Xunbin, general manager of CIMC ORIC.

The design has been optimised for a high load-to-capacity ratio and efficient hold utilisation. In addition, the twin-island deck layout and foredeck design allow additional 40 ft container bays to increase cargo capacity whilst maintaining port and operational compatibility.

As the project develops, the consortium is proceeding towards more detailed design and safety analyses (including ammonia mitigation and gas handling) and integration into the fuel system.