Kristen Diedrich March 12, 2012. Outline Perception of electric vehicles Types of electric vehicles Comparison of environmental impact Cost Comparison.

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Presentation transcript:

Kristen Diedrich March 12, 2012

Outline Perception of electric vehicles Types of electric vehicles Comparison of environmental impact Cost Comparison Possible future improvements

How environmentally friendly are electric cars?

Articles about Electric Cars “Why Electric Vehicles Will Reduce Greenhouse Gas Emissions” -Renewable Energy World “Electric Cars Hold Greater Promise for Reducing Emissions and Lowering US Oil Imports, Study Finds” -Science Daily “Do Electric Cars Really Produce Fewer Emissions?” -The Guardian “Electric Vehicles Losing Their ‘Zero Emissions’ Claim in U.S.” -Inside Climate News “Electric Car Use May Increase Carbon Emissions” -Energy Boom

Zero Emissions? Nissan Leaf Commercial: Zero-Emissions Vehicle “Vehicles which produce no emissions from the on-board source of power” -California Air Resources Board What is the problem with this definition? How do we calculate “actual” emissions?

Types of Electric Vehicles Hybrid Electric Vehicle (HEV)Plug-in Hybrid Electric Vehicle (PHEV) Plug-in Electric Vehicle (PEV or EV)

Method for Comparison Calculate the CO 2 Emissions of both a gas powered car and an electric car Assumptions: Electric Car: Nissan Leaf Gas Car: generic car with average gas mileage

Manufacturing-Related Emissions Gas Powered Vehicle: 12,000 lbs CO 2 per car Electric Vehicle: 28,000 lbs CO 2 per car Main difference: internal combustion engine vs. lithium ion battery

Gas Powered Vehicle Emissions Assume: 19.4 lbs CO 2 per gallon of gasoline 22.4 miles per gallon

Electricity Sources Coal44.9% Natural Gas23.4% Nuclear20.3% Hydroelectric6.9% Other4.5% Emissions: Coal: 2.17 lbs CO 2 per kWh produced Natural Gas: 1.40 lbs CO 2 per kWh produced Assume zero emissions for other sources Average US CO 2 emissions from electricity: (2.17)(0.449) + (1.4)(0.234) = 1.30 lbs CO 2 per kWh produced

Electric Vehicle Emissions Assume: 34 kWh per 100 miles 80% Efficiency (34 kWh)/0.80 = 42.5 kWh needed to travel 100 miles

Breakeven point: 51,000 miles driven

What if… All of your electricity comes from coal? 2.17 lbs CO 2 per kWh produced lbs CO 2 per mile driven Remember, gas powered cars produce lbs CO 2 per mile driven In this situation, gas powered vehicles have a smaller carbon footprint than electric vehicles

What if… 50% of your electricity is from renewable resources? 33% from coal, 17% from national gas lbs CO 2 per kWh produced lbs CO 2 per mile driven Breakeven point with gas powered vehicles: 35,000 miles driven

What if… You live in Wisconsin? 63% from coal, 9% from natural gas 1.49 lbs CO 2 per kWh produced lbs CO 2 per mile driven Breakeven point with gas powered vehicles: 69,000 miles driven

Economic Analysis 54% of people are willing to consider buying an electric vehicle Only 9% willing to pay more than $2,000 extra for an EV Current cost for a Nissan Leaf: $35,200 Average cost of a new car: $29,000

Fuel Cost Comparison Average Gas Price: $3.80 per gallon Average Electricity Price: $0.12 per kWh

Breakeven Point: 52,000 miles driven

Possible Future Advances Improve battery technology Increase battery life Increase range per charge Decrease emissions from manufacturing process Decrease CO 2 emissions from electricity Increase usage of nuclear and renewable fuels Clean Coal? Very politically-charged topic Other ideas?

Questions?