Authors

K. Pöhlmann, P. Berlet, IAVF Antriebstechnik GmbH, Karlsruhe; M. Kettner, S. Holzberger, X. Fudong, S. Glöckler, N. Rischette, Karlsruhe University of Applied Sciences; N. Albrecht, MAMotec GmbH, Kuppenheim; T. Weißgerber, WEISSGERBER engineering GmbH, Dortmund 

Year

2026

Print Info

Production/Publication ÖVK

Summary

Stationary gas engines in existing combined heat and power (CHP) plants must be upgraded for the desired fuel transformation from fossil natural gas to CO₂-neutral hydrogen. Therefore, a combined injection and ignition system called HydroFit unit is being developed in a cooperation project between Karlsruhe University of Applied Sciences, IAVF Antriebstechnik GmbH, MAMotec GmbH, and WEISSGERBER engineering GmbH. This system uses the existing installation space in the spark plug access hole to enable both direct hydrogen injection and ignition of the mixture via a spark plug. The hydrogen is injected into the combustion chamber via capillary tubes. This paper describes the design of a HydroFit-prototype and presents experimental results along with the derivation of improvements. The influence of operating parameters such as start and duration of injection on engine operation is analysed. The effect of different capillary designs on mixture homogenization was investigated using 3D-CFD simulations in AVL FIRE. In addition, the influence of hydrogen combustion on the wear of different engine components was determined from the experimental investigations.

ISBN

978-3-9504969-5-6

DOI

https://doi.org/10.62626/9jnq-jpon Copy link

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