Quote:
Originally Posted by MazdaMatt
He isn't just bringing a 2gal jug of hot water with him... he'll be running 2gal of hot water through the heat exchanger while keeping it hot, thereby warming the entire car... which WILL hold its heat for a while.
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Well, I'm pretty sure that you would use about the same amount of energy to move the car, as you would need to heat it to a similar level as a gasoline car... Now maybe you don't need to heat the car like a normal one, maybe 1/5 is enough to keep the window clear.
Try it out, on a really windy day, -10 C, bring a 1500W hair dryer into your car and turn it on with the interior fan on. If the temp ever gets above 0C inside the car I would be surprised. From a 72V battery, its a constant 20 amp drain. Now put the hair dryer on low and stick it down the front of your jacket, you will be sweating in 30 seconds.
I'm not trying to be negative but heating the whole interior is inefficient and expensive in a battery powered car, there are heated vests for motorbike riders that will keep your core warm and therefore your limbs for small fraction of the energy.
Ian
Doh, I'm a slow poster, as for the windshield, look into the anti fog stuff hockey players use for clear visors. And dehumidifying the car overnight might help, if the temps are near 0C. Also an old credit card works good for scraping the inside of the windows if your technology fails.