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1. WO2019035718 - ZERO EMISSION PROPULSION SYSTEMS AND GENERATOR SETS USING AMMONIA AS FUEL

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Patent claims:

Claim 1)

Zero emission propulsion system and generator sets using ammonia as fuel,

characterised by the use of ammonia (N¾) as fuel for different types of piston engines (9) where an air/ammonia (N¾) mixture is ignited by pilot ignition where hydrogen (¾), biofuels or fossil fuels are used in a separate pilot ignition system consisting of a separate intake (9-5) and prechamber (9-6) with ignition device (9-7) and intake valve (9-8) operated by intake valve control (9-9).

Claim 2)

Zero emission propulsion system and generator sets using ammonia as fuel, according to claim 1 characterised by a hydrogen reactor (4) that can cleave ammonia (N¾) so that hydrogen (¾) can be used as fuel for AIP (air independent propulsion) systems comprising fuel cells (10), Stirling engines (11) or steam turbines (7) where such systems also have their own oxygen tank (22), alternatively as a «booster» fuel for direct combustion along with oxygen (O2) in the steam turbine's inlet/high pressure side (7-1).

Claim 3)

Zero emission propulsion system and generator sets using ammonia as fuel, according to claim 1 characterised in that where no complete zero emission system is required, other fuels such as biofuels or fossil fuels may be blended with ammonia (NH3), be used for pilot ignition and possibly as a main fuel where ammonia (NH3) is not available; in relation to a steam boiler (5) or a Stirling engine (11), this may also include bio or fossil coal.

Claim 4)

Zero emission propulsion system and generator sets using ammonia as fuel, according to claim 1 characterised in that where no complete zero emission system is required, engines and power plants (5, 9, 11) may have more fuel systems to utilize pilot ignition fuel also as the main fuel.

Claim 5)

Zero emission propulsion system and generator sets using ammonia as fuel, according to claim 1 characterised in that when using ammonia (NH3) as fuel for a piston engine (9), valve control (9-9) for the pilot ignition fuel may be controlled by a camshaft, electromagnetically, hydraulically or pneumatically.

Claim 6)

Zero emission propulsion system and generator sets using ammonia as fuel, according to claim 1 characterised in that whether diesel or biodiesel is used as pilot ignition fuel, the diesel system's injector nozzle (9-7) and glow plug (9-7) will be mounted in the prechamber (9-6); the diesel system will have two different modes of operation, one for operation of the pilot ignition system and one for operation as a normal diesel engine if ammonia (N¾) is not available as fuel.

Claim 7)

Zero emission propulsion system and generator sets using ammonia as fuel, according to claim 1 characterised in that the nitrogen (N2) emitted as exhaust gas from a hydrogen reactor (4) can be stored wholly or in part in a nitrogen tank (6) for use as part of a fire extinguishing system, or used as a gas for submarine ballast tank blows.

Claim 8)

Zero emission propulsion system and generator sets using ammonia as fuel, according to claim 1 characterised in that in addition to being powered by direct combustion of ammonia (NH3), hydrogen (¾) or other bio or fossil fuels, a Stirling engine (11) can also be operated with excess heat from the exhaust to the piston engine (9), steam boiler (5), or fuel cell (10); alternatively, the Stirling engine (11) may be part of the steam turbine (7) condensation system (7-2), or a combination of these methods.