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Consider two power plants each generating electric power W& e at 300 MWe and operating at an annual capacity factor CF of 80% One plant is fueled by bituminous coal and has an overall efficiency

Consider two power plants, each generating electric power W& e at 300 MWe and operating at an annual capacity factor CF of 80%. One plant is fueled by bituminous coal and has an overall efficiency ? of 35%. The other plant is combined­cycle, gas­fired system for which the overall efficiency is 55%. Assuming higher heating values (HHV, kJ/kg­fuel) of 28,000 and 54,000 and carbon contents (CC, Mt­C/Mt­fuel) of 0.67 and 0.74 for the coal and natural gas, respectively, determine the annual fuel requirement and CO2 emissions for each plant. Express your results in tonnes (Mt). If coal and natural gas are priced at $80/Mt and $10/MMBtu, what is the annual fuel cost FC for each system? If CO2 emissions from the gas­fired system were used as the standard for capping power plant emissions, by how much would the standard be exceeded for the coalfired plant? Express your result in Mt­CO2. To discourage business­as­usual practices in the design and operation of coal­fired plants, what carbon taxes would you recommend for emissions exceeding the prescribed standard. Express your result in $ per Mt­C

 

Jul 24 2020 View more View Less

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