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Landfill Gas Energy Technologies

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Landfill Gas Energy Technologies ( landfill-gas-energy-technologies )

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separate landfills and delivered to the site through 40 km of piping. At full operation, the plant produces almost 30 MW of electricity from landfill gas [28]. Picture 16. Landfill gas-fuelled power facility in Archbald, Pennsylvania. Source: [28]. 2.2.3 Mikroturbines Microturbines are small combustion turbines that can be used in stationary power generation application. The basic components of a microturbine are the compressor, turbine generator, and recuperator. In a microturbine, the combustion air (inlet air) is compressed using a compressor and then is preheated in the recuperator using heat from the turbine exhaust in order to increase overall efficiency. The landfill gas is pressurized to 5,5 bar then chilled to 4 ̊C to remove moisture. The reheated gas temperature is kept at a minimum of – 8 ̊C above its dew point. Further treatment of the gas includes reducing siloxane and H2S content. All other gaseous components are destroyed in the microturbine combustion chamber. The heated air and LFG are burned in the combustor chamber, and the release of heat causes the expansion of the gas. The expanding gas, sent through a gas turbine, turns the generator. Then generator is producing electricity [26, 31, 32]. A general schematic of the microturbine process and cross-section of the microturbine are shown in figure 15 and 16. 58

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