| Re: Price of electricity for an electric bicycle.
In article
<459e5208$0$9771$afc38c87@news.optusnet.com.au>,
"stu" <nowhere@justyet.com> wrote:
> "Michael Press" <rubrum@pacbell.net> wrote in message
> news:rubrum-A2D2CE.19415504012007@newsclstr02.news.prodigy.com ...
> > I have questions, but no answers. Please help. Thanks.
> >
> > What is the price of electricity at the wall outlet?
> > Here it is $0.13 to $0.23 /(kilowatt-hour) + 7.5% tax.
> > Some electric companies have a stepped price schedule
> > so that the rate increases with total usage.
> >
> > How efficient is a battery charger? Does 60% of the
> > energy out of the wall get into the battery?
> What type of batteries?... but thats sounds about right for a ball park
>
> > How much power goes into overcoming rolling resistance
> > and wind resistance at 15 mph?
> Depends on the type of bike of course.....120W for a ball park
> http://www.kreuzotter.de/english/espeed.htm
>
> >
> > How efficient is the electric motor? 80%?
> >
> Again sounds like a good enough number
>
> > What is the price of electricity from wall outlet to
> > rubber on the road?
> >
> So 120W at the wheel equals 250W out of the wall.
> So if you carry a big enough battery for 4 hours (1kW/hr) it will cost
1 kW/hr is not a measure of energy. Could this be 1 kW-hr?
> between $0.13 to $0.23 + 7.5% tax, not bad for a 60 mile trip, of course at
> 12V that would be a 50Amp/hr battery
50 Amp-hr @ 12 volt?
Keep your units straight, and they will keep you straight.
--
Michael Press
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