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Electric buses at waterloo
On Tue, 17 Jul 2018 13:33:58 +0100
The Other Mike wrote: On Tue, 17 Jul 2018 11:46:47 +0000 (UTC), wrote: the sand, forget this idea of a two minute charge because thats how long it takes for your hydrocarbon car to refuel to do 600 miles to the back end of nowhere without stopping for urinating or whatever and realise the average car is, with absolute certainty, sat doing absolutely nothing but depreciating for many thousands of hours a year. Around half of that almost certainly at home. So what? Its the energy that it uses when it is moving thats the issue. Really? No wait, what am I thinking - its the energy they use when they're switched off and not moving that really matters! When I last commuted to work by car it was a round trip of about 40 miles, say 2 gallons of diesel which is approx 300 million joules of energy. 20mpg from a diesel 'car'? I could nearly get that from a UNIMOG This involved heavy traffic and is a real world mpg, not what you might have been suckered into believing in the EU test figures. Now I don't know about you, but I suspect an extra 240 * 30 = 7.2KW load multiplied by however many houses have electric cars multiplied by 7 hours will be quite a bit extra for the local substation to cope with. How about using real world kWh/distance travelled published for all commercially available electric cars rather than 'guessing'? Guessing? Sorry, was that pre-school maths too complex for you? Plus get this idea out of your head that everyone today drives around with a near full tank of hydrocarbon fuel and/or they all need to do x hundred miles a day and they need to emulate anything even remotely resembling your declared 'charging' regime There are enough people who do high mileages for whom an electric car currently is not viable. Sure, for the old lady who only goes to the supermarket once a week or the guy who drives 2 miles to work and back - win. 27kWh spread across 100 hours per week 'at home', or just 270W when on charge Recharge with 270W? LOL , yeah ok, if you hardly went anywhere you could trickle charge on that Here's some facts for you - a nissan leaf has a 40kwh battery. So to do a full recharge with 270W assuming no losses would take: 40,000 / 270 / 24 = 6 *DAYS* Feel free to point out where I've made an error in that. Or do you think a 6 day recharge time is reasonable? |
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