Ammonia-fueled engine, Hydrogen-fueled engine
International Maritime Organization (IMO) adopted "GHG reduction strategy“ in 2018, in which declared that the international ships should reduce GHG to zero as soon as possible in this century by reducing the total annual GHG emissions by at least 50% by 2050 compared to 2008, and improving the average fuel economy at least 40% by 2030. And the 77th Marine Environment Protection Committee (MEPC), held in November 2021, updated this strategy by accelerating their efforts and setting a challenging goal.
To promote substitution from conventional fossil fuels to low-carbon/carbon free fuels in international shipping to achieve the above GHG reduction goal, some alternative fuels such as LNG, LPG and methanol have already been used instead of the conventional fuels.
These low-carbon fuels are promising as a bridge solution, however their reduction rate is expected around 20%. We, J-ENG, assume that carbon-free fuels should be used and have determined to develop engines fueled with ammonia and/or hydrogen.
Ammonia-fueled engine : UEC-LSJA
Ammonia-fueled engine will be developed by applying J-ENG’s unique technology of “Stratified Injection”. It is known that ammonia is difficult to burn, but the stratified injection with pilot fuel and post fuel (ammonia) in multiple layers can realize an utmost combustion control and optimize a high suppression of N2O emission, which is said to have a high global warming coefficient, through improved mixed fuel burning ratio of ammonia.
The first ammonia-fueled engine, UEC50LSJA developing around 8,000kW with 50cm bore, will be completed in 2025.
The development work is proceeding in a consortium program subsidized by NEDO’s Green Innovation fund.
▶Visit our press release : “ Demonstration project begins for commercialization of vessels equipped with domestically produced ammonia fuel engine” on 26 October, 2021.
Hydrogen- fueled engine : UEC-LSGH
Hydrogen-fueled engine, UEC-LSGH, will be developed by applying technologies cultivated through the development of dual-fuel (DF) gas engine. The hardest technical challenge of hydrogen-fueled engine development is how to control its easy combustibility. High-pressure hydrogen injection into the combustion chamber can bring stable combustion to solve this issue.
The first hydrogen-fueled engine, UEC35LSGH developing about 5,000 kW with a bore of 35cm, is expected to complete in 2026.
After development of the dual-fuel hydrogen-fueled engine, hydrogen single-fueled engine without pilot fuel will be developed.
A joint investment company, HyENG, was already established with Kawasaki Heavy Industries Ltd. and Yanmer Power Technology Co., Ltd. in 2021 to promote the
hydrogen-fueled engine development as consortium partners.
This development task is nominated as a NEDO’s Green Innovation fund.
▶Visit our press release : “MOL, MOL Drybulk, J-ENG sign agreement for trial of hydrogen-fueled engine equipped onboard” on 9 November 2021.