Homegrown air dryer idea - don't laugh please

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Homegrown air dryer idea - don't laugh please AWN 11-30-2007
Posted by AWN on November 30, 2007, 2:21 pm
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I have read many articles about folks using well-designed relay-driven fans
and intercoolers, etc. to cool their shop air to reduce moisture. I have
been looking at an 'easy way' to achieve similar or maybe even better
results. I there any real reason why I couldn't get a cheap bar fridge and
coil copper inside of it with a fitting IN/OUT on the casing? Better yet, I
could have the top half full with copper coils boxed in and the bottom could
contain wobbly pops. Obviously a drain system would need to be looked at
inside the cooler or upstream. My other plan is to use an old AC condenser
I have with a fan but that gets kind of bulky and elaborate. Any thoughts
on this hack of a plan?

I know this might not be the best ng for this but I know a lot of folks
running plasma cutters could use dry air ideas... And may have some of their
own. If I drop my air temp by 20d F, I will reduce moisture content by 50%.
This seems like a no-brainer.

Thanks,
Andrew.


Posted by Ignoramus22774 on November 30, 2007, 3:11 pm
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> I have read many articles about folks using well-designed relay-driven fans
> and intercoolers, etc. to cool their shop air to reduce moisture. I have
> been looking at an 'easy way' to achieve similar or maybe even better
> results.

The easiest is to buy a desiccant based air dryer from me, I have
several more military surplus air dryers.

http://yabe.algebra.com/~ichudov/misc/ebay/Logis-Tech-Dehumidifier/

These also work in sub freezing weather.

> I there any real reason why I couldn't get a cheap bar fridge and
> coil copper inside of it with a fitting IN/OUT on the casing?

probably it would end up being too small.

> Better yet, I could have the top half full with copper coils boxed
> in and the bottom could contain wobbly pops. Obviously a drain
> system would need to be looked at inside the cooler or upstream. My
> other plan is to use an old AC condenser I have with a fan but that
> gets kind of bulky and elaborate. Any thoughts on this hack of a
> plan?
>
> I know this might not be the best ng for this but I know a lot of folks
> running plasma cutters could use dry air ideas... And may have some of their
> own. If I drop my air temp by 20d F, I will reduce moisture content by 50%.
> This seems like a no-brainer.

You also would be dealing with issues like refrigerant, etc.

i

Posted by theChas. on November 30, 2007, 4:45 pm
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How about taking the hot output right off he compressor and running it into
the top of an automobile A/C condensor? Put a small reserviour with a drain
trap on the bottom of the condensor, and a nice fan to cool the condensor.
Run the cooled, dry air through the pressure relief switch and you are set.
One could even put an auto moisture dump valve on the drain trap. Put a
relay on the fan that is slave to the motor.



--
Posted via a free Usenet account from http://www.teranews.com


Posted by AWN on November 30, 2007, 9:37 pm
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Thanks for the input guys. I will have to think on this a little I guess
first. Now that I think of it though I have a brand new untouched AC
condenser for a project car I'm working out (either way I will have a spare
to play with for this type of project). As far as I know the AC condensers
should be fine for the psi rating of that compressor (I believe they're
rated somewhere well over 200psi).

Thanks again,
Andrew.

Oh yeah look here for a working model or ideas ->
http://www.pro-touring.com/forum/showthread.php?t=11675&highlight=air+compre
ssor


On 11/30/07 7:41 PM, in article
wrote:

>
>> How about taking the hot output right off he compressor and running it into
>> the top of an automobile A/C condensor? Put a small reserviour with a drain
>> trap on the bottom of the condensor, and a nice fan to cool the condensor.
>> Run the cooled, dry air through the pressure relief switch and you are set.
>> One could even put an auto moisture dump valve on the drain trap. Put a
>> relay on the fan that is slave to the motor.
>>
>
> I already have a used A/C rediator for this purpose. Can I connect the
> compressor to it using standard plumbing copper tubing, or is special tubing
> needed? The compressor is an old cast iron 2 stage 5HP unit, 175 psi max.
>
> Would stainless flex gas line work? I don't know what the operating temp and
> pressure for this stuff would be.
>
> Bob
>
>


Posted by Bob F on December 14, 2007, 7:58 pm
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Sorry, but I haven't actually put it together yet. I recently acquired the
condensor that I will use when I have time for that project.

Bob

> Bob,
>
> I'm sure you have better things to do but it you think of it, can you
> take some pictures of the condenser/tubing you use with your drier? Thanks
> for the feedback.
>
> Andrew.
>
>
>
> On 12/14/07 2:58 AM, in article
> wrote:
>
>> The only issue with a car A/c condensor would be the size of the tubing. The
>> unit I have has larger tubes splitting into several paths through the unit,
>> which would reduce pressure drop. The car a/c units I've seen have a
>> relatively
>> small diameter tubing with just one path through the unit.
>>
>> Bob
>>
>>> Thanks for the input guys. I will have to think on this a little I guess
>>> first. Now that I think of it though I have a brand new untouched AC
>>> condenser for a project car I'm working out (either way I will have a spare
>>> to play with for this type of project). As far as I know the AC condensers
>>> should be fine for the psi rating of that compressor (I believe they're
>>> rated somewhere well over 200psi).
>>>
>>> Thanks again,
>>> Andrew.
>>>
>>> Oh yeah look here for a working model or ideas ->
>>> http://www.pro-touring.com/forum/showthread.php?t=11675&highlight=air+compre
>>> ssor
>>>
>>>
>>> On 11/30/07 7:41 PM, in article
>>> wrote:
>>>
>>>>
>>>>> How about taking the hot output right off he compressor and running it
>>>>> into
>>>>> the top of an automobile A/C condensor? Put a small reserviour with a
>>>>> drain
>>>>> trap on the bottom of the condensor, and a nice fan to cool the condensor.
>>>>> Run the cooled, dry air through the pressure relief switch and you are
>>>>> set.
>>>>> One could even put an auto moisture dump valve on the drain trap. Put a
>>>>> relay on the fan that is slave to the motor.
>>>>>
>>>>
>>>> I already have a used A/C rediator for this purpose. Can I connect the
>>>> compressor to it using standard plumbing copper tubing, or is special
>>>> tubing
>>>> needed? The compressor is an old cast iron 2 stage 5HP unit, 175 psi max.
>>>>
>>>> Would stainless flex gas line work? I don't know what the operating temp
>>>> and
>>>> pressure for this stuff would be.
>>>>
>>>> Bob
>>>>
>>>>
>>>
>>
>>
>



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