Agenda - 03-15-2006-1 - Laserfiche WebLink

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Fuel is supplied to the combustion section of the microt ubine under medium pressure. Air and fuel are burned in the combustor, releasing heat that causes the combustion gas to expand • The expanding gas powers the gas turbine that in turn operates the generator; the generator then produces electricity. • To increase overall efficiency, microturbines are typically equipped with a recuperator that preheats the combustion air using turbine exhaust gas. A microturbine can also be fitted with a waste heat recovery unit to heat water_ 4.2 High -Btu (Pipeline Grade) Gas Production The following treatment technologies are typically used to produce landfill gas of similar quality to natural gas. However, it is sometimes necessary to employ a combination of these technologies to obtain the desired quality. The most commonly used technologies to upgrade landfill gas quality are water absorption and PSA (pressure swing adsorption), which uses active carbon. The PSA process was assumed as the gas treatment technology for this study. 0[—i M]i -I.1 111FIII nI 11 li I� I I's the estimated methane generation and energy production capacity of the County's two landfills were based upon the estimated emissions results using the Environmental Protection Agency's (EPA) landfill gas emissions model LandGEM. This model uses a first - order decomposition rate equation for quantifying emissions from the decomposition of landfilled waste in MSW disposal facilities_ The combined methane generation rate fron both disposal facilities is estimated to peals at approximately 410 cubic feet per minute (CFM) in the years 2008 to 2010 and, subsequently, decline to approximately 180 CFM by the year 2030. Orange County 4 March 2006 Draft