From time to time I will continue to post some comments on various energy subjects. Here are the first ones on electric cars that I think help put the enthusiasm of advocates and promoters in perspective. The common mistake by most electric car supporters is that they either do not appreciate that the bigger picture must be considered, or they choose to ignore it to advance their case. These come from the London Telegraph and the Washington Post. Before you read them consider the following: A lithium-ion battery, at its best, packs 110 watt-hours of energy per pound. Gasoline has 6,000 watt-hours per pound. Now, a gasoline motor is inefficient, discarding 85% of the fuel’s energy–losing it to the transmission, wasting it on idling and discharging it as heat. Electric motors waste just 10%, but it still leaves gas with a 9-to-1 weight advantage. (And the cost of the battery today is likely more than the cost of the gasoline saved by going electric!) Here’s the reference: http://www.forbes.com/forbes/2010/0628/energy-autos-electric-cars-ibm-nissan-running-on-air.html
London to Edinburgh by electric car: it was quicker by stagecoach.
The BBC’s stunt of taking an electric Mini to Edinburgh reveals just how impractical rechargeable cars are, writes Christopher Booker of the London Telegraph.
Stagecoach, depicted by Van Gogh in one of his letters, Photo: Paul Grover
In its obsessive desire to promote the virtues of electric cars, the BBC proudly showed us last week how its reporter Brian Milligan was able to drive an electric Mini from London to Edinburgh in a mere four days – with nine stops of up to 10 hours to recharge the batteries (with electricity from fossil fuels).
What the BBC omitted to tell us was that in the 1830s, a stagecoach was able to make the same journey in half the time, with two days and nights of continuous driving. This did require 50 stops to change horses, but each of these took only two minutes, giving a total stopping time of just over an hour and a half.
Considering that horse power was carbon-free, emitting only organic fertilizer along the way, isn’t it time the eco-conscious BBC became more technologically savvy? Continue reading