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･ MHIET will conduct a technical evaluation of 500kW, 6-cyl 100% hydrogen engine･ Installing a 100% hydrogen engine generator set and hydrogen supply facility within Sagamihara Plant for evaluation, MHIET aims to help carbon neutrality through marketing its products

Installation site in Sagamihara Plant

Illustration of hydrogen engine generator set for technical evaluation

Tokyo, July 6, 2023 - Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. (MHIET), a part of Mitsubishi Heavy Industries (MHI) Group, has been developing hydrogen combustion engines referred to in its roadmap to carbon neutrality(Note1) and generator set for commercialization as one product that supports MHI Group's MISSION NET ZERO declaration.

Earlier, MHIET has established technologies to stabilize combustion of 100% hydrogen in a single cylinder engine of 170mm cylinder bore and 220mm piston stroke modified from its GSR series, a gas engine offered in 6 to 16 cylinders at Japan's National Institute of Advanced Industrial Science and Technology (AIST).

As the next step for commercialization, the knowledge gained from the testing has been utilized to develop a 6-cylinder 100% hydrogen engine with 500kW output and integrate it into a generator set. The hydrogen engine generator set as well as hydrogen supply facility will be installed within its Sagamihara Plant, and construction work for the supply facility has begun first. The facility depressurizes the high-pressure hydrogen gas brought in by hydrogen trailers and supplies the hydrogen gas to the generator set. The technical evaluation of the hydrogen engine generator set is planned to start in FY2024.

A thorough performance of the newly developed engine will be evaluated, including combustion, output and reliability. Safety system of the generator set will be closely monitored as hydrogen requires very strict care in handling(Note2).

Reciprocating engines have the unique structure that can burn a variety of fuels. Hydrogen engine generator sets are considered as a promising technology in energy transition that can bring about carbon neutrality of distributed power systems because they emit zero CO2 while responding to power needs. MHIET endeavors to help achieve carbon neutral society through the marketing of fully validated hydrogen-fueled engine products to the world.

■Stable combustion of 100% hydrogen on a single cylinder engineMHIET Conducts Combustion Test for Hydrogen Engine with Pure Hydrogen -- Joint Project with AIST to Achieve Stable Combustion of 100% Hydrogen Fuel for a Carbon-free, Hydrogen Economy -

■Rated operation of hydrogen mixed fuel on commercial gas engine for cogeneration systemToho Gas and MHIET Successfully Conduct Test Operation of City Gas and Hydrogen Mixed-fuel Combustion in a Commercial Gas Engine for a Cogeneration System -- Rated operation at 35% hydrogen mixed fuel burning ratio a first in Japan -

■Future development

Mitsubishi Heavy Industries (MHI) Group is one of the world’s leading industrial groups, spanning energy, smart infrastructure, industrial machinery, aerospace and defense. MHI Group combines cutting-edge technology with deep experience to deliver innovative, integrated solutions that help to realize a carbon neutral world, improve the quality of life and ensure a safer world. For more information, please visit www.mhi.com or follow our insights and stories on spectra.mhi.com.