Hydrogen Co-firing Gas Engine
In response to the urgent global environmental challenges, Kawasaki Heavy Industries is undertaking various initiatives. One such initiative is the Kawasaki Green Gas Engine, which has achieved world-class power generation efficiency and environmental performance. Building on this, we have developed a 30vol% Hydrogen Co-firing engine, based on the Kawasaki Green Gas Engine. While maintaining the performance of the existing engine, this new model achieves further decarbonization, contributing to a better life for people around the world and a sustainable future for our planet.
Key Features
Advanced Technology & Future-Oriented
Based on the KG Series, which has a track record of over 240 units (as of March 2025), we have realized a high-efficiency, high-output Hydrogen Co-firing gas engine.
Retrofit Compatibility
By applying minimal modifications to existing KG Series engines, rapid deployment is possible.
Hydrogen Ready
- Hydrogen co-firing ratio can be adjusted even during operation.
- Flexible response based on hydrogen supply volume.
- Stable operation is possible even at low concentrations (from 5 vol.%).
Output during 0～30 vol% hydrogen co-firing
| Model | Number of cylinders | Output(kW) | |
|---|---|---|---|
| 50Hz/750rpm | 60Hz/720rpm | ||
| KG-18-T.HM | 18 | 7,800 | 7,500 |
Main Changes from Natural Gas Mono-Firing Engines (Main Body)
- Reduction of fuel gas leakage risk
- Reduction of flanged joints where leakage is expected (piping modifications)
- Flanged joints and other areas where fuel gas may leak are covered and monitored with detectors
- The entire area around the cylinder cover is enclosed and monitored with detectors
- Replacement with hydrogen-compatible components (main/sub fuel gas valves, fuel gas pressure sensors, etc.) System Flow
System Flow
Layout Example
Click the buttons in the diagram to view more details.
Hydrogen Trailer Receiving Unit
Compressed hydrogen transported by trailer is received at this unit.
Gas Engine Generator Building
The gas engine generator and auxiliary units are installed in this building, which also provides soundproofing measures.
KGG Module
This module regulates the pressure of the mixed gas received from the Hydrogen Mixing Unit to match the inlet pressure requirements of the gas engine.
Hydrogen Mixing Unit
To ensure stable combustion in the engine, this unit pre-mixes hydrogen with natural gas.
Related Links
- [Press release] Kawasaki Develops Thirty-percent-hydrogen Mixed-fuel Combustion Technology for Large Gas Engines (Mar. 16, 2022)
- [Press release] Kawasaki Builds Japan’s First Thirty-percent-hydrogen Mixed-fuel Large Gas Engine Verification Testing Facility (Apr. 15, 2024)
- [Press release] Kawasaki Successfully Completes Japan’s First Operational Test Run with Thirty-percent-hydrogen Mixed-fuel Large Gas Engine (Jul. 29, 2024)
- [Press release] World’s First Commercial Launch of Hydrogen 30% Co-Firing Large Gas Engine System ～ Towards a Carbon-Neutral Society with Hydrogen Ready Products ～ (Sep. 30, 2025)
Contact
If you need more information about our business,
please feel free to contact us.
