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-   -   Homemade A/C, requesting thinkers. (https://www.homemadeturbo.com/fabrication-14/homemade-c-requesting-thinkers-79181/)

idiot-stick 06-18-2007 11:51 AM

Re: Homemade A/C, requesting thinkers.
 
First off, if you havent already, tint your windows.

After that, get a bigger alternator.

Do some thermodynamics mathimications and come up with how many peltiers you will need for reasonably cool air.

Hook up hoses to an evaporator core thats stock for your car and put it in your evap box. Circulate cold air created through the peltiers through the evap core. Use a fan to direct ambient air from the inside of the car to the hot side of the peltiers and dump the peltier waste heat outside the car.

im the ------- genius. You can probably do all this for <$300. not sure if it would work or not but it sounds feasable.

If everything worked as it should, you could just click on your stock AC button to engage the peltier array and accompanying fans and cold air would come out the stock vents.

MikeJ-2009 06-18-2007 12:14 PM

Re: Homemade A/C, requesting thinkers.
 

Originally Posted by SloS13


Do some thermodynamics mathimications and come up with how many peltiers you will need for reasonably cool air.

It may be easier to just eat hollow points for breakfast. Let me go see..... :'(

SpankedYA! 06-18-2007 12:32 PM

Re: Homemade A/C, requesting thinkers.
 
Peltiers are the least effective way to cool anything. When I was into overclocking a lot of guys went that way.........for a short while.

kirby-h23 06-18-2007 01:08 PM

Re: Homemade A/C, requesting thinkers.
 
you could try a system like this but it would require you to run an ac compressor and im not sure the gains would be enough to make up for that and have a little extra. plus it takes up space and is heavy.

http://www.freeimagehosting.net/uplo...13f5e4e095.jpg

im not a tuner nor have any tuning experience:
what caught my eye with this system is that your air intake temperatures should always stay the same correct?(the pump would always run)

well wouldnt this give you a sort of intercooler spray that is constant?

like intercooler spray drastically lowers your air intake temperatures all of a sudden and the air molecules become denser.
your car was tuned with normal air through the intercooler.
wouldnt that cause a lean condition? or is the temperature difference not enough to make a difference?

with the a/c system you could tune your car for running indefinatly on the same colder air and thus be able to make a finer tune and make more power. maybe?


gen4acclude 06-18-2007 01:51 PM

Re: Homemade A/C, requesting thinkers.
 
just put the stock ac in it problem solved

stenseltizm 06-18-2007 02:51 PM

Re: Homemade A/C, requesting thinkers.
 

Originally Posted by rawr
ac's work by compressing mad refrigerant.

the refrigerant "heats up" because its so compressed, it doesn't loose any energy, so its "hotter"

this heat energy and compressed refrigerant is taken to the condenser coil, this coil dissipates heat energy thats collected when the gas is compressed


the room temperature compressed air is then taken to the evaporator coil (the intercooler), this coil allows the gas to expand. When the low heat energy gas expands it only has so much energy to disperse across the medium that is the refrigerant so the refrigerant has a net heat energy loss per molecule. This is what makes "cold". that core that the air blows through is just making the ambient air lose enery as the refrigerant is trying to go back to an atmospheric temperature/ an equilibrium with the heat energy of everything in its surrounding environment.

Like dave said, AC isn't some chemical reaction that creates cold, its actually just rapidly removing heat energy from a system. It takes a lot of power/energy to carry all of that heat away, its a really inefficent process. Your best bet is using some gold bond on your nuts and rolling with the heat. I hope that explains it some?

Exactly, so theoretically steve could run a bottle of co2, no2, or basically any compressed gas that he could run through his core. The compressed gas looses its extra heat energy gained by compression while it sits in the tank before he even bolts it into his car. then he could just run it through the expansion valve and stock core just like a stock system does. but then vent that to the atmosphere. no need for a condenser or heat exchanger or pump. you need all that to recompress the gas, then loose the gained heat, so the system isn't expendable and doesnt need refilled.

I have no idea how efficient it would be, or how long one bottle would last. but it would cool some air for some amount of time, it would just be half of the a/c system. Though I have no experience with that ----, so one bottle could only last 5 seconds, or it could last your 2 hr drive. I have no clue.

jinxy 06-18-2007 04:05 PM

Re: Homemade A/C, requesting thinkers.
 
it would work, but do you really want to drive around with a 3k psi bottle of co2 or something in your car?

y7turbo 06-18-2007 05:44 PM

Re: Homemade A/C, requesting thinkers.
 
https://i111.photobucket.com/albums/...urbo/carac.jpg

WTF 06-18-2007 05:49 PM

Re: Homemade A/C, requesting thinkers.
 
seriously my friend was just talking about putting a small window unit in the hatch of his integra, not sticking out but sittin in back and piping the exhaust out, and getting a decent sized inverter to run it, i think he said the smaller ones at walmart only need 500watts and you can get 1000w inverters for under $100

we talked about it for a while and it seems doable to me i was even considering it, i think it could be done for about $200 hmt style

a tiny window unit would make your car ice cold in probly a minute

im in the same boat, theres nothing left of my ac, either side of the firewall :3 i use a spray bottle for now it helps

rexsk8er 06-18-2007 06:34 PM

Re: Homemade A/C, requesting thinkers.
 
why dont you just hook up the regular ac system, than design an intercooler that works on the ac system to supercool your charge air sorta like a water to air ic only with refrigerant , in turn makeing up in hp what your loosing in engine drag and weight.

actually a system was done similar to that on a volvo in a recent issue of euro tuner


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