Sailing yachts have always used wind for propulsion. Today, modern sailing yachts offer high standards in interior fittings and require electrical energy for navigation, safety, secondary propulsion and auxiliary units on board the ship to operate the sports yacht. This energy is provided from fossil primary energy sources. As part of the CF07 project, a functional model for an energy supply with ammonia is to be developed. The functional model will be used as a real laboratory in the partners' future CAMPFIRE Open Innovation Lab for further research projects. The aim is to develop a ship design for a sports yacht with a 750 W SOFC on-board power supply and a 15 kW hydrogen/ammonia engine drive.
As part of its CAMPFIRE sub-project, FVTR GmbH is developing a hydrogen/ammonia engine based on an LPG engine. The test engine will be used to investigate the suitability of ammonia as a marine primary fuel in combination with an ammonia cracker in test bench trials. Once successfully tested, the engine is to become part of an emission-free sports yacht as a drive unit and function here in combination with an SOFC hybrid system. In detail, the following targets are defined for this sub-project:
- Comparative analysis of the concepts for fuel injection and ignition with regard to mixture formation, energy conversion and power control and their suitability for combustion engines in marine applications
- Determination of the design and thermodynamic boundary conditions for energy conversion, taking into account the development targets (literature research +
1D simulation) and derivation of a concept for the conversion of a test engine - Construction and testing of a functional model with flexibly adjustable fuel composition (H2/NH3) on an engine test bench
- Rating of the engine control unit for stationary and transient operation, taking into account the avoidance of undesirable combustion phenomena (e.g. knocking and misfiring)
- Integration of an ammonia cracker into the fuel path
- Conceptual design, construction and commissioning of the integration of the H2/NH3 engine into the sports yacht