Machinery spaces of category A
The methanol machinery space, whether it is for propulsion or power generation, shall be designed in a way that it is gas safe. This is accomplished with double- walled fuel piping. There shall be possibilities to purge the inner pipe and to monitor the annular space for hydrocarbons. The engine itself is subject to the same requirements as a conventional diesel engine, in principal, apart from some added features, such as crankcase gas detection.
The SPIRETH project uses conventional SCANIA diesel engines, modified for OBATE combustion. See Ch. 1.1.2 for further details. For the Stena Germanica, Wärtsilä proposes to use a common rail concept with pilot diesel. See Ch. 220.127.116.11 for further details