LPG fuel-propelled LPG/ammonia carrier “GAS AMETHYST”
Kawasaki Heavy Industries is 86,700 meters3We have handed over the LPG (liquefied petroleum gas) fuel-propelled LPG/ammonia carrier “GAS AMETHYST” (our 1760 ship).
This ship is the conventional 84,000m3LPG fuel propulsion 86,700 m, which is our newest ship type, which has expanded its cargo capacity from a type LPG carrier and is also capable of transporting ammonia3It is the 5th type LPG/ammonia carrier. This is the 12th ship to use an LPG fuel propulsion engine handed over by our company, and the 75th LPG carrier as a whole.
The LPG/ammonia carrier handed over this time can transport LPG, which is already being used as low-carbon energy, and ammonia, which is expected to be used in the future as a new fuel in a decarbonized society, and can also be combined and transported simultaneously. Furthermore, the volume of the cargo tank has been increased without drastically changing the main aspects of the hull, such as overall length and width, from conventional ship types so that it can enter major LPG terminals around the world.
Furthermore, this ship is equipped with a shaft generator on the shaft connected from the main engine to the propeller, and it is possible to cover onboard electricity from the main engine output. Due to the operation of the shaft generator, the diesel generator is stopped during normal navigation, and a small amount of pilot fuel is removed, making it possible to sail completely on LPG fuel, making it a more environmentally friendly ship.
Based on environmental regulations that are being strengthened worldwide and specific action plans represented by the SDGs, we will continue to develop and provide ship technology that is friendly to the global environment, such as LPG fuel-propelled LPG carriers, LPG/ammonia carriers, and liquefied hydrogen carriers, which are attracting attention as next-generation energy, and contributing to the realization of a low-carbon and decarbonized society.
＜Main items＞
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＜features＞
| 1) | The main engine is the marine electronically controlled liquefied petroleum gas injection diesel engine (ME-LGIP engine) “Kawasaki-MAN B&W 6G60ME-C10.5-LGIP” manufactured by our company. By using LPG as fuel, SOx (sulfur oxide) and CO in exhaust gas compared to when using conventional fuel oil2Emissions can be drastically reduced, and SOx regulations※1and EEDI Phase 3※2It has been adapted to. | |
| 2) | NOx (nitrogen oxide) tertiary regulation※3A system compatible with is adopted, and the main engine is an exhaust gas recirculation device (EGR)※4, the power engine is a selective reduction catalytic denitrification device (SCR)※5It is being applied. This system allows NOx emission control areas (ECA) even when using conventional low-sulphur fuel oil※6It is possible to sail. | |
| 3) | Fuel consumption is reduced by equipping the propeller with a ladder valve with Kawasaki fins, semi-ducts with contrafins, and energy-saving fins. | |
| 4) | This ship has obtained concept design approval from the Japan Maritime Association for using ammonia as ship fuel, and it is possible to change to specifications that can use ammonia as ship fuel in the future. |
| ※1 | SOx Emissions Regulations: Regarding emissions from ships, SOx emission regulations of 0.1% or less of sulfur in fuel have been implemented by the IMO in the European and American Emissions Control Areas (ECA) since 2015/1. Also, from January 2020, ships sailing in all other parts of the world are required to use fuel with a sulfur content of 0.5% or less, or to use alternative devices that equally reduce SOx from exhaust gases. | |
| ※2 | EEDI (Energy Efficiency Design Index) regulations: CO emissions when carrying 1 ton of cargo 1 mile2An international regulation that uses an energy efficiency design index (EEDI) defined as the number of grams of a new ship to enforce compliance with regulatory values for the energy efficiency performance of new ships. EEDI regulation values will be gradually strengthened according to construction contract dates and delivery dates. For some ship types, such as large LPG carriers and LNG (liquefied natural gas) carriers, phase 3 (30% CO from standard value) from construction contract ships after 20222reduction) is required. | |
| ※3 | NOx emission regulations: Emissions from ships are regulated by the IMO, and in the tertiary regulations that have been implemented since 2016, European and American emission control areas (ECA) are limited as designated sea areas, and a further 80% reduction from the primary regulation value is stipulated. | |
| ※4 | Exhaust gas recirculators (EGR): It is a device that reduces NOx emissions by washing part of the exhaust gas of the main engine with clean water and returning it to the main engine as combustion air, thereby lowering the oxygen concentration and combustion temperature of the combustion air and suppressing the oxidation reaction of nitrogen at high temperatures. Furthermore, the washing water used to clean exhaust gases removes soot (soot), oil, etc., and is treated in a harmless state and discharged overboard. | |
| ※5 | Selective reduction catalytic denitrification equipment (SCR): It is a device that reduces NOx emissions by spraying urea water on the high-temperature exhaust gas of a power generator, which reacts with NOx in the exhaust gas via a catalyst such as titanium or vanadium, and reduces nitrogen and water. | |
| ※6 | Emission Control Areas (ECA): It indicates a specific sea area (Baltic Sea area, sea area within 200 nautical miles of the United States/Canada, United States Caribbean Sea, Mediterranean Sea) where application of regulation values for sulfur concentrations stricter than general sea areas is required. |
[Reference link]
Kawasaki Super Green Products (LPG fuel-propelled large LPG carriers)
https://www.khi.co.jp/sustainability/earth/green/2018/lpg.html
Energy saving technology
https://www.khi.co.jp/mobility/marine/technology/energy_saving.html
