International Journal of Gas Turbine, Propulsion and Power Systems
Online ISSN : 1882-5079
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  • Harald H.-W. Funke, Nils Beckmann
    2022 Volume 13 Issue 2 Pages 1-7
    Published: 2022
    Released on J-STAGE: April 27, 2022
    JOURNAL FREE ACCESS
    The role of hydrogen (H2) as a carbon-free energy carrier is discussed since decades for reducing greenhouse gas emissions. As bridge technology towards a hydrogen-based energy supply, fuel mixtures of natural gas or methane (CH4) and hydrogen are possible. The paper presents the first test results of a low-emission Micromix combustor designed for flexible-fuel operation with variable H2/CH4 mixtures. The numerical and experimental approach for considering variable fuel mixtures instead of recently investigated pure hydrogen is described. In the experimental studies, a first generation FuelFlex Micromix combustor geometry is tested at atmospheric pressure at gas turbine operating conditions corresponding to part- and full-load. The H2/CH4 fuel mixture composition is varied between 57 and 100 vol.% hydrogen content. Despite the challenges flexible-fuel operation poses onto the design of a combustion system, the evaluated FuelFlex Micromix prototype shows a significant low NOx performance and high combustion efficiency over a wide fuel range.
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