Colour choice affecting range?

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Sorry couldn't resist. 😉🙂👍
 
Theory says a white car is cooler in the sun but warmer at night, and black is hotter in sunshine but colder at night.
As I do I was pondering this overnight.
Making quite a few assumptions, my thoughts went thusly.
power used to cruise on a flat road with no head wind, around 10kW.
power used to run A/C about a tenth of that.
difference in heat between black and white about a tenth of that again,
so a 1% difference in range.

But later on I realised, there's not just radiation to think about, there's also conduction.
Which means the faster you go the more the radiation induced heat is cooled.
So if you go fast enough the car's skin is close to ambient with any colour you choose.

Who started this complicated problem??
 
As I do I was pondering this overnight.
Making quite a few assumptions, my thoughts went thusly.
power used to cruise on a flat road with no head wind, around 10kW.
power used to run A/C about a tenth of that.
difference in heat between black and white about a tenth of that again,
so a 1% difference in range.

But later on I realised, there's not just radiation to think about, there's also conduction.
Which means the faster you go the more the radiation induced heat is cooled.
So if you go fast enough the car's skin is close to ambient with any colour you choose.

Who started this complicated problem??
You, it wasn't complicated before you made it that way :LOL:

T1 Terry
 
White cars have less fewer accidents, you want proof? I have had a few accidents, but never in a white car.
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Negligible I’d say, but interesting question, air con is a big user of battery power, with the S6 I’ll be using the seat cooling function as an alternative as it uses very little from testing it against the change in range.
Air con doesn't use that much power, on the other hand heating does. Aircon is permanently on in my car through winter and summer when needed.
 
Air con doesn't use that much power, on the other hand heating does.
I think it depends on the heating, if it's reverse cycle A/C (I think you guys call that a heat pump), heating should be very similar to cooling. If it's done by forcing current through narrow wires, it will be a lot more.
 
Dunno. The one night I spent in the car with the aircon on (not usually much call for that in the Highlands) I was quite startled in the morning to see how much battery it had used compared to having the heating on.
 
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