APPROPRIATE COMBUSTION ENGINE.docx - APPROPRIATE COMBUSTION ENGINE EXTERNAL COMBUSTION ENGINES(EC ENGINES STIRLING MOTORS In such motors biogas is

APPROPRIATE COMBUSTION ENGINE.docx - APPROPRIATE COMBUSTION...

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APPROPRIATE COMBUSTION ENGINE EXTERNAL COMBUSTION ENGINES (EC ENGINES ) STIRLING MOTORS : In such motors, biogas is combusted externally, which in turn heats the Stirling motor through a heat exchanger. The gas in the Stirling motor hence expands and thereby moves the mechanism of the engine. The resulting work is used to generate electricity. Stirling motors have the advantage of being tolerant of fuel composition and quality. They are, however, relatively expensive and characterized by low efficiency. Their use is therefore limited to a number of very specific applications. In most commercially run biogas power plants today, internal combustion motors have become the standard technology either as gas or diesel motors. INTERNAL COMBUSTION ENGINES DIESEL ENGINES operate on biogas only in dual fuel mode. To facilitate the ignition of the biogas, a small amount of ignition gas is injected together with the biogas. Modern pilot injection gas engines need about 2% additional ignition oil. Almost every diesel engine can
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