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Old 08-25-2005, 02:47 PM   #1
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air chiller idea

sorry for the rant, i just had an idea type deal thing and if this is in the wrong section, could a moderator please move it. thanks

i started thinking about this a while back when i read an article about a supra using dry ice to cool the air being blown into the engine. the extremely cool air gave it about 103hp extra.

so, using what i had learned from pc cooling at XS, i began thinking what a small home made chiller would be capable of. it would replace the intercooler and could possible save some space within the engine bay. i have built some units to cool pc's in the past that ranged from -25C to-35C using ordinary propane (its pretty much a universal refrigerant), hell ive got one beside me that'll do -80C. theses things weigh about 20-30 pounds and can be made pretty small, about 2 cubic feet.

i'd like to have some input in the idea if anyone thinks that it would be worth while to think out further or if im just blowing smoke. what do you guy's think, could this work?

and her's a pic to clear thing up a bit:


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Old 08-25-2005, 03:04 PM   #2
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How much heat can the chiller remove? It might make cold air, but is it's for a computer, it must be on a small scale. What is the power sourse of the cooler.

Persoanlly, I wouldn't be too excited about having propane under the hood. Kind of flammable.
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Old 08-25-2005, 03:06 PM   #3
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other than the propane it sounds like you are onto something
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Old 08-25-2005, 03:53 PM   #4
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propane is just the easyest gas to get. other gasses can be used such as r22 (no flamable and much safer), but you have to remeber that gasoline is also highly flamable and combustible ;). propane just came to mind because it will work with any refrigeration oil where r22 and many other gasses require POE oil. as for load, it can vary by alot. small units can handle up to 300+ watts and higher with the right gasses and a tune. larger units can keep a 300 watt heatload well below -100C.

power sources are 110v normally but cars have an ac compressor that uses r134a to cool the car. i was thinking that recharging such a compressor with r290 (propane), stripping the car of the no longer needed ac components except compressor, add a descent condensor and see what it'll do. there are also valves called txv's (automatically adjustable) and pev (manually adjustable) that can be be used to adjust the flow of refrigerant to compensate for different load conditions/ heat loads.

its like a fridge strapped to the roof of your car. an evil vampire fridge that foams from the mouth and has blood dripping off its teeth with tatoos all over its arms and a mean biker attitude
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Old 08-25-2005, 05:23 PM   #5
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so basically you want to use your air conditioner for intake air ??
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Old 08-25-2005, 05:39 PM   #6
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in a sense that would be sort of like what im thinking of but with an heat exchanger instead
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Old 08-25-2005, 07:02 PM   #7
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remember, running the AC compressor takes power away from the wheels. are you gonna be able to chill the air enough to make enough extra power to make it worth it? and don't forget you'll have to bypass the WOT AC disable switch
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Old 08-25-2005, 10:47 PM   #8
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Has anyone besides me thought about using one of those round inline intercoolers that are Air to water and just plumb in the freon lines to replace the water?
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Old 08-25-2005, 11:19 PM   #9
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You could use TECs (thermoelectric coolers, aka peltiers) to provide the refrigeration, the problem would be cooling those. On a TEC one side gets hot and the other gets cold; the cooler the "hot" side, the colder the cold side gets...sometimes spectarularly so. Its not uncommon (with a high enough watt TEC) to see something like a hot side temperature of 60* F and a cold side temperature of -20* F. I suppose it would be entirely feasable to rig an independent radiator system that only cooled the TECs, they you'd just have to fabricate a heat exchanger.
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Old 08-26-2005, 07:14 AM   #10
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what would worry me is the propane on board and all the heat you would have to get rid of to make the cool side work

Also the weight

Other than that it would work fine

Tom
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