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/kWh
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
----------------------
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
_____________________
Total CO2 reduction per year = 3229.08 lb + 1422.857 lb = 4651.94 lb
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