Homemade A/C, requesting thinkers.
06-18-2007, 11:51 AM
#11
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Join Date: Apr 2004
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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.
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.
06-18-2007, 12:14 PM
#12
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Join Date: Feb 2003
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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.
06-18-2007, 01:08 PM
#14
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Join Date: Mar 2007
Posts: 33
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.
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?
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?
06-18-2007, 02:51 PM
#16
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Join Date: Sep 2004
Posts: 1,588
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?
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?
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.
06-18-2007, 05:49 PM
#19
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Join Date: Jan 2006
Posts: 2,057
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
i use a spray bottle for now it helps
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
i use a spray bottle for now it helps
06-18-2007, 06:34 PM
#20
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Join Date: Oct 2004
Posts: 277
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
actually a system was done similar to that on a volvo in a recent issue of euro tuner
