[Shop-talk] Looking to buy a compressor

[Darrell Walker]

HI Arvid,

I agree that between the compressor and tank is better, I’m just not willing to start re-plumbing a new compressor (though it does look pretty straight forward to do).  But if it isn’t effective where I’m putting it, I will certainly consider it.

-Darrell

> On Aug 12, 2020, at 9:16 AM, Arvid <arvidj999 at gmail.com> wrote:
> 
> I would highly recommend it be between the compressor and the tank.
> 
> My, possibly faulty, logic.
> 
> The air coming from the compressor is really hot. This would enhance the differential temperature between the radiator and the cooling air would be at it's largest point. It would seem to make the radiator work as efficiently as possible. In my case, 175 psi two stage, the input is over 200f and the output seems to be close to 100f. The fan is blowing 70f room air over a 200f+ radiator.
> 
> The air would now be cooler as it enters the tank and hopefully most of the condensation that is going to take place would be in the tank. Great for one-place-to-drain.
> 
> No matter what the air will also cool while it is in the tank. This is a good thing for condensation but it also means that, if the radiator comes after the tank, the radiator will see considerably lower incoming air temperatures. On my compressor the air coming out of the tank is often room temperature and is seldom more than 10 degrees above room temperature. Therefore a radiator after the tank would not have a huge differential to work with. At best it would be blowing 70f air over a 90f radiator. Plus there is now need to have a local drain for the condensation it might produce.
> 
> My thought is between the compressor and the tank, a condensate filter\water separator and additional filters after the tank and then drains below coupling on the drops.
> 
> Just my thought,
> 
> Arvid
> 
> On 8/12/20 10:53 AM, Darrell Walker wrote:
>> 
>> The transmission cooler I’m looking to use is a "stacked plate” design, and has a pressure rating of 200 PSI.  It says it has a 29,200 BTU rating:
>> 
>> https://www.summitracing.com/parts/BMM-70274 <https://www.summitracing.com/parts/BMM-70274>
>> 
>> I do plan to put a small box fan to blow through it as well.
>> 
>> Here are some pictures, but these all seem to be between the compressor and tank, mine will be mounted on the wall after the tank.
>> 
>> https://www.cnccookbook.com/aftercooling-a-compressor-to-cut-down-on-moisture/ <https://www.cnccookbook.com/aftercooling-a-compressor-to-cut-down-on-moisture/>
>> 
>> 
>> -Darrell
>> 
>> 
>>> On Aug 12, 2020, at 8:35 AM, Jeff Scarbrough <fishplate at gmail.com> <mailto:fishplate at gmail.com> wrote:
>>> 
>>> Good point.  I hadn't thought of air flow rate.  Hook several in parallel?
>>> 
>>> On Wed, Aug 12, 2020 at 11:26 AM DAVID MASSEY <dave1massey at cs.com <mailto:dave1massey at cs.com>> wrote:
>>> That's a clever idea.  It is an excellent heat exchanger and is good for the pressure.  But it could restrict air flow.  Most are just a long, serpentine tube with fins.  It all depends on what air tools you are using.  It is possible that you couldn't run a sand blast cabinet through it.  But you could hook up the high volume users to bypass the cooler and save the dry air for the tools that need it.
>>> 
>>> Dave 
>>> 
>>> 
>>> 
>>> -----Original Message-----
>>> From: Jeff Scarbrough <fishplate at gmail.com <mailto:fishplate at gmail.com>>
>>> To: shop-talk at autox.team.net <mailto:shop-talk at autox.team.net> <Shop-talk at autox.team.net <mailto:Shop-talk at autox.team.net>>
>>> Sent: Wed, Aug 12, 2020 10:12 am
>>> Subject: Re: [Shop-talk] Looking to buy a compressor
>>> 
>>> 
>>> 
>>> On Wed, Aug 12, 2020 at 11:08 AM Pat Horne <patintexas at icloud.com <mailto:patintexas at icloud.com>> wrote:
>>> 
>>> I’d be concerned with using a transmission cooler for an aIr cooler because they are not designed for pressure use. I wouldn’t think a trans cooler would need to be rated at more than 10psi.
>>> 
>>> An air conditioner condenser would probably be better.  It even has "condenser" in the name.... 
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>> 
>> 
>> 
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