General AC Question...

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NeedMoreSleep - 24 Jul 2005 20:35 GMT

Hi, I’ve been lookin online for some info on AC systems. Basically I
have an idea for a general device to lower cooling temperatures in
modern cars, but I need to know some general info to see if it is
feasable. On most modern cars the AC system recirculates the air from
inside the car and cools that air; thus making it more efficient.
What I need to know is where this air is drawn in from the cabin to be
cooled further? Basically, is there a semi-common area that cars pull
the cabin air in for further cooling, or is it different for each car.
Also, if you have the info, what type of ducting system is used for
this air en route to the coils from the cabin?

Thanx guys :-)

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SnoMan - 24 Jul 2005 20:36 GMT

>Hi, I’ve been lookin online for some info on AC systems.
>Basically I have an idea for a general device to lower cooling
>temperatures in modern cars, but I need to know some general info to
>see if it is feasable. On most modern cars the AC system

recirculates

>the air from inside the car and cools that air; thus making it more
>efficient. What I need to know is where this air is drawn in from

the

>cabin to be cooled further? Basically, is there a semi-common area
>that cars pull the cabin air in for further cooling, or is it
[quoted text clipped - 3 lines]
>
>Thanx guys :-)

The best way to increase the efficency of a car A/C is to insulate the
car because they basically have zero insulation and even if you took
the return air from a different spot, it is still going to take "x"
amount of BTU’s to cool the cabin, You could insulate the airconditier
ducting as I did me in my 89 burb because the A/C evaporator and
"box" is located under the hood that year and a lot of cooling is
lost there if not insulated. (I found some thin self sticking hi temp
insulation on line that worked grear for that) Also you could insulate
the return lines for the freon and the receiver drier so that the
return freon is heated less under the hood before it is re compressed,
cooled and expanded again.

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roger53 - 25 Jul 2005 21:55 GMT

Most all cars have the return for the A/C under the dash somewhere, each one
being somewhat different. The intact of air is generally located at the
blower wheel and facing the firewall, so as to pick up less trash.
Most GM and other American cars do not have a way to completely shut off
the outside air and will always draw in a percentage of outside air and mix
that with the inside air thus adding warm outside air and cutting down on
the a/c's effiencency.

Roger

>>Hi, I've been lookin online for some info on AC systems.
>>Basically I have an idea for a general device to lower cooling
[quoted text clipped - 23 lines]
> return freon is heated less under the hood before it is re compressed,
> cooled and expanded again.

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