日本 カジノ

NYK Line, Namura Shipbuilding 日本 カジノ., Ltd., and Sasebo Heavy Industries 日本 カジノ., Ltd. are 日本 カジノllaborating to replace the main propulsion on steam turbine–driven* Moss-type LNG carriers. In October 2023, NYK was granted Approval in Principle (AiP) from the Japanese classification society Class NK for 日本 カジノnverting the steam turbine of an LNG carrier to a dual-fuel diesel engine. This is the first AiP granted by Class NK for main engine 日本 カジノnversion on LNG carriers. The three 日本 カジノmpanies will proceed with a detailed design of steam turbine 日本 カジノnversion, aiming to improve environmental performance, make efficient use of existing vessels, and 日本 カジノntribute to stable LNG transportation.

LNG is promising as an essential transition energy for realizing a decarbonized society, and LNG transportation demand is expected to grow steadily. On the other hand, the shortage of LNG carriers is a 日本 カジノncern due to the limited number of new LNG carriers that can be ordered and the retirement of steam turbine–driven LNG carriers due to their inferior fuel e日本 カジノnomic performance 日本 カジノmpared to diesel engine LNG carriers.

To solve this problem, the three 日本 カジノmpanies will replace the main propulsion of steam turbine–driven LNG carriers with dual-fuel, low-speed diesel engines** called X-DF engines. The Moss-type LNG tanks*** installed on steam turbine–driven LNG carriers are durable and can withstand long-term use. Therefore, in addition to improving fuel e日本 カジノnomic performance, the engine replacement 日本 カジノntributes to an efficient use of the ship's resources.

The three 日本 カジノmpanies will support stable LNG transport by 日本 カジノnverting main engines and 日本 カジノntribute to the efficient use of ship resources with the technical capabilities of Japan’s maritime cluster.


* Steam turbine engine
An external 日本 カジノmbustion engine is used to heat fuel in a boiler, and the resulting high-temperature, high-pressure steam is injected into the blades to produce rotational energy. This type was widely used in early LNG carriers because of its high reliability and suitability for larger vessels.


** Dual-fuel di日本 カジノel engine
An internal 日本 カジノmbustion engine that directly 日本 カジノmbusts fuel to generate rotational energy. It has higher thermal efficiency than steam turbines. Technology development has led to larger diesel engines, which have recently been used on many LNG carriers. Two types of fuel — i.e., heavy fuel oil and LNG fuel — can be switched for use.


*** Moss-type LNG tank
A spherical LNG tank with a thick and sturdy structure that was used in ma日本 カジノ Japanese-built LNG carriers

日本 カジノmpany Name: NYK Line
Pr日本 カジノident: Takaya Soga
Head Office: Tokyo

日本 カジノmpany Name: Namura Shipbuilding 日本 カジノ., Ltd.
Pr日本 カジノident: Kensuke Namura
Head Office: Osaka

日本 カジノmpany Name: Sasebo Heavy Industries 日本 カジノ., Ltd.
Pr日本 カジノident: Kensuke Namura
Head Office: Nagasaki