Doctor Drivel wrote:

"The Natural Philosopher" wrote in message
...
Rod wrote:
The Natural Philosopher wrote:
http://www.ft.com/cms/s/0/7f2f081e-2...077b07658.html

But how do you heat an electric car? Not much fun using a totally
unheated behicle in the winter. Even keeping the screens clear
becomes a bit of a problem.

Electric heaters, plus recirculating the odd few hundred watts that
does come off the battery pack. And maybe the motors. You don't need
much more than a couple of hundred watts to heat a decently insulated
car.

A small unit with a heat pump extracting heat from the motors will
increase efficiency greatly, and the car space is small to heat too. If
broke slot out and new one in. Heat pump tumble dryers cut energy
consumption by 50%.

A heat pump might not actually be such a bad idea, as it would be
reversible for aircon with little additional weight penalty or cots penalty.