Determine the reduction in carbon dioxide emissions (lb/yr) that would occur if
ID: 2324750 • Letter: D
Question
Determine the reduction in carbon dioxide emissions (lb/yr) that would occur if you 1) updated lighting in a single family home, from incandescent to LED lighting, and if you 2) updated your car from a model getting 25 MPG to a model getting 35 MPG. Lighting Data: Assume 20 fixtures, averaging 800 lumens, operating 4 hr/d. Assume your source of electricity is generated from a coal fired power plant. Power Required to Generate 800 Lumens for Various Lighting Types Light Emitting Diode Compact Fluorescent Incandescent Power Required 8 W 15 W 60 W Car data: Assume you drive a gasoline powered Toyota Camry and use E10 gas (10% ethanol). You plan to replace the Camry with a diesel Volkswagen Jetta. Assume your yearly mileage is 12,000 miles/yr. Carbon dioxide emissions data; source: Source: US Energy Information Administration. CO2 Emission Data for Various Fuels. Fuel CO2 Unit Gasoline 19.64 lb/gal E10 gasoline (10% ethanol) 18.95 lb/gal Diesel fuel 22.38 lb/gal Ethanol 12.73 lb/gal Coal 2.13 lb/kWh Natural gas 1.22 lb/kWh #6 fuel oil 1.76 lb/kWh Determine the reduction in carbon dioxide emissions (lb/yr) that would occur if you 1) updated lighting in a single family home, from incandescent to LED lighting, and if you 2) updated your car from a model getting 25 MPG to a model getting 35 MPG. Lighting Data: Assume 20 fixtures, averaging 800 lumens, operating 4 hr/d. Assume your source of electricity is generated from a coal fired power plant. Power Required to Generate 800 Lumens for Various Lighting Types Light Emitting Diode Compact Fluorescent Incandescent Power Required 8 W 15 W 60 W Car data: Assume you drive a gasoline powered Toyota Camry and use E10 gas (10% ethanol). You plan to replace the Camry with a diesel Volkswagen Jetta. Assume your yearly mileage is 12,000 miles/yr. Carbon dioxide emissions data; source: Source: US Energy Information Administration. CO2 Emission Data for Various Fuels. Fuel CO2 Unit Gasoline 19.64 lb/gal E10 gasoline (10% ethanol) 18.95 lb/gal Diesel fuel 22.38 lb/gal Ethanol 12.73 lb/gal Coal 2.13 lb/kWh Natural gas 1.22 lb/kWh #6 fuel oil 1.76 lb/kWh Determine the reduction in carbon dioxide emissions (lb/yr) that would occur if you 1) updated lighting in a single family home, from incandescent to LED lighting, and if you 2) updated your car from a model getting 25 MPG to a model getting 35 MPG. Lighting Data: Assume 20 fixtures, averaging 800 lumens, operating 4 hr/d. Assume your source of electricity is generated from a coal fired power plant. Power Required to Generate 800 Lumens for Various Lighting Types Light Emitting Diode Compact Fluorescent Incandescent Power Required 8 W 15 W 60 W Car data: Assume you drive a gasoline powered Toyota Camry and use E10 gas (10% ethanol). You plan to replace the Camry with a diesel Volkswagen Jetta. Assume your yearly mileage is 12,000 miles/yr. Carbon dioxide emissions data; source: Source: US Energy Information Administration. CO2 Emission Data for Various Fuels. Fuel CO2 Unit Gasoline 19.64 lb/gal E10 gasoline (10% ethanol) 18.95 lb/gal Diesel fuel 22.38 lb/gal Ethanol 12.73 lb/gal Coal 2.13 lb/kWh Natural gas 1.22 lb/kWh #6 fuel oil 1.76 lb/kWhExplanation / Answer
For 20 fixtures, averaging 800 lumens, operating 4 hr/d, the energy consumed per year by:
Incandescent is 20 * 800 lumens * 60W / (800 lumens) * 4 hr/d * 365 d = 1750 KWh
LED is 20 * 800 lumens * 8W / (800 lumens) * 4 hr/d * 365 d * 3600 sec/d = 234 KWh
These energies are from coal burning. Hence, CO2 emitted for:
Incandescent is 1750 KWh * 2.13 lb/KWh = 3727.5 lb
LED is 234 KWh* 2.13 lb/KWh = 498.2 lb
CO2 Reduction from lighting = 3727.5lb - 498.2lb = 3229.08 lb
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Total E10 gas used by Camry per year is (12000 miles/yr) / (25 miles per gal) = 480 gal
CO2 emitted by E10 = 480 gal * 18.95 lb/gal = 9096 lb
Total diesel used by Jetta per year is (12000 miles/yr) / (35 miles per gal) = 342.86 gal
CO2 emitted by diesel = 342.86 gal * 22.38 lb/gal = 7673.143 lb
CO2 Reduction from car = 9096lb - 7673.143lb = 1422.857 lb
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Total CO2 reduction per year = 3229.08 lb + 1422.857 lb = 4651.94 lb
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