Mitsubishi Heavy Industries: Engine that generates electricity with 100% hydrogen: Established stable combustion method
Mitsubishi Heavy Industries and AIST:
Mitsubishi Heavy Industries and others have established a stable combustion method for an engine that generates electricity with 100% hydrogen.
MHI Engine & Turbocharger (MHIET):
Manufactured an engine that uses hydrogen as fuel.
“We have found conditions for stable combustion with a hydrogen utilization rate of 100%.”
The policy is to utilize the results of this time and aim to put a 1MW class hydrogen engine into practical use.
Conventional problem: Abnormal combustion
Hydrogen is characterized by “a wide flammable range and a high combustion rate”.
Therefore, “abnormal combustion called backfire or knocking” is likely to occur.
When using it as fuel, it is important to take measures against it.
This solution: Stable combustion conditions
This test was based on the MHIET / lean burn gas engine GSR series.
According to the combustion characteristics of hydrogen
Fuel delivery method,
Ignition method,
When to close the air supply valve,
The excess air rate was reviewed.
As a result, we found “stable combustion conditions in the hydrogen-only combustion / premixing method”.
Test results:
Succeeded in test operation up to 340kW in 6-cylinder conversion and 920kW in 16-cylinder conversion.
Furthermore, we will accumulate test data and proceed with the development of multi-cylinder engines.
The policy is to aim for the practical application of a 1MW class hydrogen engine.
Smart Japan
https://www.itmedia.co.jp/smartjapan/articles/2101/22/news042.html
MHIET 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 —
Strengthening efforts to develop a hydrogen engine based on its diesel and gas engines
make it available on the market ･ Achieved stable combustion of 100% hydrogen fuel with a single cylinder engine at AIST
Aims to make 1 MW-class hydrogen engine available for the introduction of hydrogen economy in the 2030s Tokyo,
January 21, 2021
The Mitsubishi Heavy Industries Group
has been working on the development of various products that will have zero CO2 emissions.
MHI Engine & Turbocharger, Ltd. , a part of the group,
is strengthening its efforts to develop a hydrogen engine based on their existing diesel and gas engines.
MHIET
has conducted a combustion test of a hydrogen engine in a joint research project with Japan’s National Institute of Advanced Industrial Science and Technology (AIST).
A modified single cylinder gas engine (bore 170mm x stroke 220mm) based on MHIET’s 4-stroke reciprocating gas engine “GSR series”
offered in 6 to 16 cylinders was installed at the AIST Fukushima Renewable Energy Institute (Koriyama, Fukushima Prefecture).
The test was carried out to identify the conditions to achieve stable combustion of 100% hydrogen without emitting CO2.
MHIET and AIST
began the joint research on combustion of hydrogen on an engine in fiscal 2019.
MHIET and MHI Research Center
designed and built the hydrogen engine using the knowledge of hydrogen combustion technology, industrial-use diesel engines and natural gas engines, studied the conditions for optimum combustion, and analyzed the test data.
AIST constructed and operated the hydrogen supply equipment and the test bench and acquired data utilizing its experience in developing combustion technology for high-power, high thermal efficiency, and low NOx (nitrogen oxide) hydrogen engines for large scale power generation.