Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Strategies & Market Trends : The Residential Real Estate Crash Index -- Ignore unavailable to you. Want to Upgrade?

To: Lizzie Tudor who wrote (169495)	12/6/2008 12:24:36 PM
From: neolib	Read Replies (2) \| Respond to of 306849

Hmm its about .1 kilowatt-hours per mile for a small EV No way. Assume that applies at say 30mph (I'm not sure where the optimal would be, but that is a WAG). Then for 1 hour of driving you go 30 miles, and you claim to use 30 x 0.1KWHr = 3KWHr, which implies (since it takes 1 Hr) a power of 3KW or about 4 Horsepower. Power is power, so the same vehicle could do the same thing using a 4HP gasoline engine as well. Except I don't know of any small EV that could be driven 30mph on 4HP.

To: Lizzie Tudor who wrote (169495)	12/6/2008 4:40:37 PM
From: Dan3	Respond to of 306849

Re: the fact that EVs use electric power including coal which is abundant in the USA, it allows the US economy to keep the 200-800 billion we spend on oil from the middle east today, so its a win for a number of reasons. That's absolutely true. I think there may be some errors in your other numbers, though. A 134HP engine = a 100KW engine. A car (regardless of what powers it) faces power requirements, typically, of 6 to 12 horsepower to cruise at a moderate speed (60 or less) and as much as you want to use to accelerate quickly or go fast. There's a nice analysis here: onlinepubs.trb.org