[quote]stokedporcupine8 wrote:
Unaware wrote:
Everyone is not going to be driving electric cars any time soon. The math doesn’t work.
In greater LA for example:
Say there are 2.5 million cars on the road during rush hour,
Each car is using average 25 horsepower,
746W per HP,
(2.5 x 10^6)(25)(746) = 4.6 x 10^10 Watts
or ~46 GW peak load
The two reactors at San Onofre produce about a Gigawatt each. So you are looking at 45 new nuclear reactors. Don’t think so.
Edit: 10c a KWh isn’t even that cheap, lots of places generate half that price. This won’t change anything.
More demand + diminishing supply + inflation = higher oil prices
Your calculation is meaningless. Obviously all the cars on the road during rush our aren’t all plugged in at once and drawing power during rush hour. Also, just because a car puts out around 25 hp driving around rush hour traffic doesn’t mean it will constantly draw 25 hp while it’s sitting and charging. Anyway, I don’t know enough about electric cars and whatnot to give any better calculation of how electric cars will affect peak loads, but I do know enough to know yours doesn’t make sense. [/quote]
No its not meaningless, its just simplified. Obviously they are all not plugged in at the same time. But maybe they are all plugged in when they get home after rush hour. You could reduce that by spreading out when people charge, but then theres way more than 2.5 million cars in LA. Either way you are talking about a huge strain on the power grid.
If you prefer:
The US uses 378,000,000 gallons of gasoline a day.
One gallon of gasoline 121 MJ
= 4.5 x 10^16 joules per day
Now 1 GW reactor running 24hours a day produces
1 x 10^9(3600)(24) = 8.64 x 10^14
Or you need ~529 large nuclear reactors to produce the same amount of energy that the US consumes in gasoline everyday. Not going to happen in the next 20 years.
Now you could say that eclectic cars are more efficient, or whatever other mitigating factors that might lead our eclectic cars to use less energy than they do in gas.
I will admit my calculations are crude, but there is no way this portable nuclear reactor is goign to give us $4 oil or let us all use electric cars.
Edit: math