google search for "air to air heat exchanger" - there are many
companies that make products that do exactly what you want.
I'd be interested to see if these actually save any money. I'd
guess that the cost of moving the air around is going to be a factor.
Seems to me that you have to move air regardless of what you use to cool it.
Joe
I've seen some designs that actually use water as the transport and
many-finned radiators at each end. Radiator transfer heat into cold water
inside which is pumped up a radiator in the sub-zero temps on the roof and
exchanged and then looped back.
Same basic principle as a traditional residential heat-pump that loops
through the ground 20 feet down or so.
I think using straight air would probably not be as efficient as a
closed-loop water transfer.
The Arctic Region Supercomputing Centre in Fairbanks, Alaska would be a good candidate for this...
* <http://www.arsc.edu/resources/yukon.html>Yukon -- 272-processor CRAY T3E
* <http://www.arsc.edu/resources/chilkoot.html>Chilkoot -- 32-processor CRAY SV1ex
* <http://www.arsc.edu/resources/klondike.html>Klondike -- 512-processor CRAY X1
* <http://www.arsc.edu/resources/icehawk.html>Icehawk -- 200-processor IBM SP
* <http://www.arsc.edu/resources/iceflyer.html>Iceflyer -- 32-processor IBM Regatta
* <http://www.arsc.edu/resources/iceberg.html>Iceberg -- 800-processor IBM System
* <http://www.arsc.edu/resources/rime.html>Rime -- 8-processor CRAY SX-6
http://www.arsc.edu/
For those who have never visited Fairbanks, there is a phenomena observed at -15C and lower known as "square tire". The rubber in tires of parked vehicles will become stiff and freeze into position, making the vehicle impossible to move without destroying the tires. To the best of my knowledge the ARSC does have conventional AC units, as Fairbanks reaches +24C and higher in mid summer.
-Eric Kuhnke
The coldest recorded temperature in North America was -63C in Snag, Yukon on 3 February 1947. On the same day, in Tanacross, Alaska, -59.4C was recorded.
-15C is a normal daytime winter temperature in Southwestern Ontario; a very cold day might approach -30C. There are a fabulous number of places in Canada where the temperature remains below -15C for weeks and months at a time. I haven't been here (in Southwestern Ontario) that long, but I think if there was some danger that tyres would rip off my wheels when I drove off in the morning, someone would have tried to sell me something by now.
It is hard to believe that tyres used in Alaska would cease to be useful at only -15C. That's not even cold, really. Shirt and sandals weather.
Joe
> For those who have never visited Fairbanks, there is a phenomena
> observed at -15C and lower known as "square tire". The rubber in tires
> of parked vehicles will become stiff and freeze into position, making
> the vehicle impossible to move without destroying the tires.The coldest recorded temperature in North America was -63C in Snag,
Yukon on 3 February 1947. On the same day, in Tanacross, Alaska, -59.4C
was recorded.
Of course there have been times that my wife has dropped the temperature
below -63C with one of her looks 
D
I can't speak for Alaska, but I've had to drive at -40(C/F) in northern NY.
Yes, the tires get 'square', and will go a bit wump wump wump until they warm
up (usually after a half mile or so). However, a tire should be able to deal
with this without much trouble (or at least in almost a decade of trying
I never actually managed to damage a tire noticably that way).
What *is* embarassing and potentially a big issue is if you've been driving,
the tires are warmed up, and you park on a layer of several inches of snow/ice,
and return a few hours later to find the tires have melted down into the ice
and then refrozen.....
> > For those who have never visited Fairbanks, there is a phenomena
> > observed at -15C and lower known as "square tire". The rubber
in tires
> > of parked vehicles will become stiff and freeze into position, making
> > the vehicle impossible to move without destroying the tires.
>
> The coldest recorded temperature in North America was -63C in Snag,
> Yukon on 3 February 1947. On the same day, in Tanacross, Alaska, -59.4C
> was recorded.
>Of course there have been times that my wife has dropped the temperature
below -63C with one of her looks
I could make a joke here about destroying onesself if you tried to move from
one of those looks too. 
Instead, I'll just say, "Don't let her look at your car like that."
DJ
Eric Kuhnke wrote:
For those who have never visited Fairbanks, there is a phenomena observed at -15C and lower known as "square tire". The rubber in tires of parked vehicles will become stiff and freeze into position, making the vehicle impossible to move without destroying the tires.
In Ottawa, there's usually a week's worth of -25C as a _high_ temperature for the day during the winter, and occasional dips below -40C. "Square tire" just means it goes thumpity for a few hundred yards. Rubber embrittlement is more a phenomena for the -70Cs (near -100F) and below.
But if you have a tire get frozen into ice, that may be a different story...
More intriguing is what has to be done at high arctic places (like little Ellesmere island, the northernmost mine in the world). Most of the vehicles are Toyota diesel pickups (winter weight fuel, you betcha!). They never shut the engines down. Except when they're indoors for an oil change.
Chris Lewis wrote:
More intriguing is what has to be done at high arctic places (like
little Ellesmere island, the northernmost mine in the world). Most of
the vehicles are Toyota diesel pickups (winter weight fuel, you
betcha!). They never shut the engines down. Except when they're
indoors for an oil change.
You "foreigners" are scary. As a UK resident, born in Oz many many years
ago, I consider -10C to be very very cold.
Peter
For those who have never visited Fairbanks, there is a phenomena observed at -15C and lower known as "square tire". The rubber in tires of parked vehicles will become stiff and freeze into position, making the vehicle impossible to move without destroying the tires. To the best of my knowledge the ARSC does have conventional AC units, as Fairbanks reaches +24C and higher in mid summer.
As someone who has lived in Saskatchewan all his life, I can tell you that "square tire" does not usually involve destruction of the tire. If your tire is slightly flat, it can certainly freeze with a flat side. This makes driving interesting for a while, but the tire will thaw as it is driven on.
Peter Galbavy wrote:
You "foreigners" are scary. As a UK resident, born in Oz many many years
ago, I consider -10C to be very very cold.
You know it's cold when you have to deal with diesel fuel in chunk form by shovel. (Well, actually, with a fork. It solidifies into a rather waxy/oozy gunk. In a previous life, I worked in a refinery lab, testing for fuel freezing points down to -100F/-80F amongst other fun things.).
A friend of mine was on a crew that was setting up a drilling rig in the mountains of Wyoming. In an effort to get -any- kind of
heat, they opened the valve on the propane tank and it blubed a couple of times into a steel bucket. They all stood around throwing
matches at it but it wouldn't lite. They finally gave up and went back to the truck to get warm. The whiskey which was on the
dashboard was frozen solid.
Uhm, 9/5 * -10 +32 . . . 14 degrees ? Peshaw. As long as it's over 0 I'm
OK.