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Actual Porsche owner
 
wdfifteen's Avatar
 
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Quote:
Originally Posted by kaisen View Post
I'm in a cold climate. There are tons of them here. If you can keep them plugged in, you can set the climate control to allow "shore power" to heat the car. Then when you drive off it's already warm and you're just maintaining the temp. If it's not plugged in and you need to warm with 100% battery power, you're going to have a limited range (Volt not withstanding).
Great to see you here Eric. Thanks for the knowledge.
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Old 06-10-2014, 12:59 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #21 (permalink)
least common denominator
 
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Originally Posted by vash View Post
^This.

Or warm pixie dust.
Unicorn farts!
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Old 06-10-2014, 01:02 PM
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how much power do you need to heat a car? A couple KWs on a cold day?

A tesla battery is 85 kwH for the large one I think, so with that estimation it would drain the battery at a rate of about 2% per hour for resistance heating

A more interesting question for porsche owners is how is it airconditioned and can the system be adapted to a 911!
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Old 06-10-2014, 01:39 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #23 (permalink)
Get off my lawn!
 
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Quote:
Originally Posted by aschen View Post
how much power do you need to heat a car? A couple KWs on a cold day?

A tesla battery is 85 kwH for the large one I think, so with that estimation it would drain the battery at a rate of about 2% per hour for resistance heating

A more interesting question for porsche owners is how is it airconditioned and can the system be adapted to a 911!
Sure, you just need a 600 amp alternator.
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Old 06-10-2014, 02:25 PM
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Originally Posted by GH85Carrera View Post
Sure, you just need a 600 amp alternator.
you might be able to get away with 200 amps or so. It still sounds easier than snaking a bunch of coolant lines around the car.


2kw of compressor power X a COP of around 3 would = 6kw of heat removal. That sounds like enough but I have no idea in practice.

Not that I am condoning any of this as a good idea really
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Old 06-10-2014, 03:07 PM
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So you will have to ADD 200 amps to the current system. ( pun intended)
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Old 06-10-2014, 03:14 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #26 (permalink)
Just thinking out loud
 
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Quote:
Originally Posted by aschen View Post
A more interesting question for porsche owners is how is it airconditioned and can the system be adapted to a 911!
You need 24volts DC and an electric compressor. The Prius has them. Outside of that, any 12 volt compressor driven by a rotating mass can drive a compressor. A half shaft would suffice.

I hear some 911 racers are doing just that with the tiny Suzuki compressors in order to save weight and remove the theft of HP, all while complying with rules stating the car has to have functional ac.
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Old 06-11-2014, 03:12 AM
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Quote:
Originally Posted by kaisen View Post
I'm in a cold climate. There are tons of them here. If you can keep them plugged in, you can set the climate control to allow "shore power" to heat the car. Then when you drive off it's already warm and you're just maintaining the temp. If it's not plugged in and you need to warm with 100% battery power, you're going to have a limited range (Volt not withstanding).
So their heating system is for moderate climate? I'm talking -30C with snow.
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Old 06-11-2014, 11:32 AM
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Old 06-11-2014, 04:01 PM
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Back in the saddle again
 
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Quote:
Originally Posted by wdfifteen View Post
I am so 20th Century. I would have said resistance heaters. So, smart guy, without any IC engine to produce a vacuum, what makes the wipers go?
Dude, seriously? Where have you been for the last 40 or 50 years. Most wiper motors are electric.
Quote:
Originally Posted by flipper35 View Post
Where does the heat come from on an air (oil) cooled 911? I believe they also have resistance just like a space heater if the system doesn't give enough heat.
The exhaust, purely from air blown over the hot exhaust pipes (except for the rare old option of the gas heater).
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Old 06-11-2014, 04:03 PM
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I assumed both were joking
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Old 06-11-2014, 04:58 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #31 (permalink)
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