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1)How much can the US reduce CO2 emissions from coal from the current 48.9 C? Assume D:C ratios of 1.2 for coal, and 2.23 for natural gas. (a) If we currently use 33.9 D for natural gas, and 11.9 D for coal, what would be the emissions in units of C by eliminating coal power plants with an energy efficiency of 32.2% to natural gas plants with an efficiency of 43.1%? (b) What would be the change in C if the gas plants were 65% efficient? 2) If a coal plant with an efficiency of 32.6% (Dff:C = 1.2) is replaced by a natural gas plant that produces the same amount of electricity but at an efficiency of 43.6% (Dff:C=2.23), what is the percentage of CO2 reduction? Consider both the reduction in CO2 for the energy in the fuel, and the relative efficiency of the plant.

1)How much can the US reduce CO2 emissions from coal from the current 48.9 C? Assume D:C ratios of 1.2 for coal, and 2.23 for natural gas. (a) If we currently use 33.9 D for natural gas, and 11.9 D for coal, what would be the emissions in units of C by eliminating coal power plants with an energy efficiency of 32.2% to natural gas plants with an efficiency of 43.1%? (b) What would be the change in C if the gas plants were 65% efficient? 2) If a coal plant with an efficiency of 32.6% (Dff:C = 1.2) is replaced by a natural gas plant that produces the same amount of electricity but at an efficiency of 43.6% (Dff:C=2.23), what is the percentage of CO2 reduction? Consider both the reduction in CO2 for the energy in the fuel, and the relative efficiency of the plant.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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1)How much can the US reduce CO2 emissions from coal from the current 48.9 C? Assume D:C ratios of 1.2 for coal, and 2.23 for natural gas.

(a) If we currently use 33.9 D for natural gas, and 11.9 D for coal, what would be the emissions in units of C by eliminating coal power plants with an energy efficiency of 32.2% to natural gas plants with an efficiency of 43.1%?

(b) What would be the change in C if the gas plants were 65% efficient?

2) If a coal plant with an efficiency of 32.6% (Dff:C = 1.2) is replaced by a natural gas plant that produces the same amount of electricity but at an efficiency of 43.6% (Dff:C=2.23), what is the percentage of CO2 reduction? Consider both the reduction in CO2 for the energy in the fuel, and the relative efficiency of the plant.

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