thranx said:
from your first source which compares electric cars to combustion with energy loss.
"The idea of using electric motors that are 90% efficient may sound good, until the issue of generating electricity and distributing it is considered. In the UK, it’s estimated that by the time electricity arrives at your home, it is 33% efficient. In other words, 67% of the original fuel energy has been lost. So even if you assume battery charging is 90% efficient, and the electric motor is 90% efficient, the overall energy efficiency suddenly drops to 26.73%, only 0.73% better than internal combustion engines (see detailed explanation at end of article)."
So with that in mind would it not be better to foucs on making internal combustion engines more efficent so our oil supply lasts longer? Like Volkswagon has with some of their cars bringing the MPG up to 40+? Instead of forcing new technolgies on our economy that are not yet cost effective? Why not make better use of what we have. I think the only way electric cars will be viable is if the US suddenly decides to build Nucleuar Power PLants again. i don't see that happening anytime soon so we need to focus on getting more use out of our fossil fuels. Its my understanding that great strides have beeen made in coal burning powerplants. And what of the damage to enviroment from wind farms and mining for the materials to make solar cells? I really have tried to find ways in which solar and wind power are cost effective as I really wanted to lower my home electric bill, and right now they just aren't. I tried everywhich way I could think of. The only way I found I could possibly lower my bill wa by purchasing a propane powered generator but even than it would be barely worth it to do so. I honestly do care for the enviroment ( i dont care abnout global warming as i dont believe we are a mojor factor) I worry about all of the pollutants we put in the air that cause illnesses and cancer and the only solution I see that is viable and feasible right now is nuclear power. Maybe after a transition to nucleur power we can sart a transition to green energies.
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Now you're talking about creating markets where none exist.
Electric companies have it in their best interest to be as efficient as possible. Car companies do not.....except for the regulations that Obama imposed on them.
Furthermore, a power plant is capable of running off of only 70% fossil fuels, and it's a mix of different fuels of varying sources, so they're not as reliant on gasonline. 30% of their input comes from renewable energy. Additionally, that 33% is for the average combustion power plant. More modern cogeneration plants are up to 50% efficient, and also are capable of boosting it to 80% once you factor in the heat usage. See, the traditional power plant combusts fuels to heat up water which then powers turbines. That results in 2 things, stored energy and heat. The heat then escapes via smokestacks. Cogeneration plants are capable of using that escaping heat to power heating and cooling systems across areas.
See, 200 degress in not very useful in creating energy, but it is still useful in heating water. A good cogeneration plant can heat and cool a large area, including water supply, and also create electrical energy.
So, on the one hand, you have an average car running at around 16%, a car "built" for efficiency (on gas alone) at 25%, using 100% gas (or ethanol mix), and a power plant that is capable of transference of between 30-80% based on the plant type.
I mean, just look at the costs to tell you the whole picture. It costs 4$ to go your mpg in a car (thereabouts), Traveling the same distance on electricity is only 4kWh, roughly 1$. If you're looking at an equivalent size, you still be paying half as much. So what that tells us, is that a portable combustion chamber is at least twice as inefficent as electric power source.
However, advances are still being made in green car techologies including things like cogenerated power sources, ie; a mix of gas and electric (hailed as the best version of green car), that can heat itself, charge itself, and cost 25-50% per distance. Plus your less at prey to market fluctuations over the price of gas. Just in one year, if you put 10$ into your tank every 2 days, you'd save roughly 1000$ per year with a hybrid. the more gas you put in, the higher that savings grows. I know people that put in 50$ a week or more.