best electric mileage cars image
alwaysyode
for electric cars? The current heat wave is stressing the grid that has had blackouts in the past. I am trying to understand how it would be able to service all the electric cars the industry and government are moving towards.
Answer
It depends upon how it is done and who you ask. Our electric grid is not like a fuel pump. Fuel is produced according to demand. It can be produced 24/7 as it is in many refineries and the capacity of the refineries only have to match the total consumption.
It has not been economical to store our grid electricity. Consumption varies throughout the day. The peak consumption is typically from around 10 am up to around 9 pm. We have to have enough power to supply this peak demand and the number of power plants and their capacity is then sized to the peak load. This leaves a lot of unused capacity in the off peak hours.
If we were to charge electric vehicles in the off peak times estimates of our capacity to power a percentage of our present fleet with our existing power plants range from:
73% http://www.groovygreen.com/groove/?p=1782
to
84% http://www.greenbiz.com/news/2006/12/11/mileage-megawatts-enough-grid-capacity-charge-plug-vehicles
Plug in electric vehicles also have the capacity to make the entire grid more efficient by providing energy storage and "peak shaving:" http://www.govtech.com/gt/articles/766804
http://www.udel.edu/V2G/ Owners of electric vehicles could conceivably use them as an income by having the vehicles charge with cheap off peak electricity and then sell the power back to the grid at peak rates. Electric cars then can effectively increase our peak power capacity without adding any new power plants.
It depends upon how it is done and who you ask. Our electric grid is not like a fuel pump. Fuel is produced according to demand. It can be produced 24/7 as it is in many refineries and the capacity of the refineries only have to match the total consumption.
It has not been economical to store our grid electricity. Consumption varies throughout the day. The peak consumption is typically from around 10 am up to around 9 pm. We have to have enough power to supply this peak demand and the number of power plants and their capacity is then sized to the peak load. This leaves a lot of unused capacity in the off peak hours.
If we were to charge electric vehicles in the off peak times estimates of our capacity to power a percentage of our present fleet with our existing power plants range from:
73% http://www.groovygreen.com/groove/?p=1782
to
84% http://www.greenbiz.com/news/2006/12/11/mileage-megawatts-enough-grid-capacity-charge-plug-vehicles
Plug in electric vehicles also have the capacity to make the entire grid more efficient by providing energy storage and "peak shaving:" http://www.govtech.com/gt/articles/766804
http://www.udel.edu/V2G/ Owners of electric vehicles could conceivably use them as an income by having the vehicles charge with cheap off peak electricity and then sell the power back to the grid at peak rates. Electric cars then can effectively increase our peak power capacity without adding any new power plants.
what do hybrid electrics and natural gas vehicles have in common?
Justin M
What do hybrid electric cars and regular gasoline vehicles have in common? how are they different? thanks.
Answer
Hy brid cars make use of a small gasoline engine and an electric motor that runs at low speeds. A normal gasoline car just has an engine. To get the full benefit of a hybrid, you have to travel slow so that the electric motor will kick in which gets you better mileage
Hy brid cars make use of a small gasoline engine and an electric motor that runs at low speeds. A normal gasoline car just has an engine. To get the full benefit of a hybrid, you have to travel slow so that the electric motor will kick in which gets you better mileage
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Title Post: Can our electric power grid really provide all the electric power needed?
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