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Thread: Air Compressor Problem
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2nd September 2013, 07:02 PM #31Philomath in training
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2nd September 2013 07:02 PM # ADSGoogle Adsense Advertisement
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3rd September 2013, 08:48 PM #32
After a bit of searching for materials to use for the vertical air drier I found just what I wanted.
The support pole holding up my shed! There is one right next to the compressor position. 2 inch diam galv pipe. Top is welded to roof bar. Bottom is buried in concrete.
So a little playing around with the angle grinder and welder and I get a multipurpose unit.
Have I mentioned yet that I am a bit tight with the folding stuff?
Dean
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4th September 2013, 01:40 AM #33Member
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I agree that a condenser would be a good project idea, but sometimes it can be an overkill, here's an example I found on the internet...
aij.jpg
I think I may go with the simple cold pipe set up.
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4th September 2013, 09:42 AM #34SENIOR MEMBER
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LOL.
You don't actually need a fan on a setup using a car condensor.
Passive cooling and convective air flow does it nicely - from what I've read.
RobThe worst that can happen is you will fail.
But at least you tried.
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7th September 2013, 09:19 AM #35GOLD MEMBER
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7th September 2013, 09:24 AM #36SENIOR MEMBER
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He has all the heat wash going back onto the compressor - LOL
Should be turned 90 degrees to get it away.
RobThe worst that can happen is you will fail.
But at least you tried.
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7th September 2013, 09:55 AM #37.
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7th September 2013, 10:21 AM #38GOLD MEMBER
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Yes but its better than no airflow over the compressor
all that air is coming off the condenser is still at a lower temp than the discharge temp the compressor temp its self....this in turn will help keep the compressor cooler and including a lower continuous operating temp
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7th September 2013, 10:23 AM #39GOLD MEMBER
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yeah...left unchecked he could find his roof a tad lower than normal one day..after all its only galv on the outside (meant to reply to that a few days ago)
all that condensation and other impurities is actually acidic....not much at first but it does increase if left alone
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7th September 2013, 10:32 AM #40GOLD MEMBER
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water to air would be better efficiency....not best
a refrigerated air dryer would be best...but then we aint talking about economics of it all
water aint cheap either these days so static air to air heat exchange is best from an economic point...then would come forced air to air...eg a fan blowing over a condenser
forgot about geothermal...but that means a lot of diggin
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7th September 2013, 11:53 AM #41
See? Thats why this is such a great forum. A good point Bob. Thanks for pointing it out. I did not consider that aspect. The shed has been standing for about 60 yrs now and with luck will get quite a few more years.
Bob and Eskimo. I was thinking of making a section of round with a tapered hole then drill and tap into the side for a drain tap so all water was expelled. I think this pole would last as long as I needed it but I am not about to do something that will affect the shed structure.
yeah...left unchecked he could find his roof a tad lower than normal one day..after all its only galv on the outside (meant to reply to that a few days ago)
all that condensation and other impurities is actually acidic....not much at first but it does increase if left alone
Dean
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9th September 2013, 11:54 PM #42Member
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I made the following on Sunday...I apologize for the poor picture quality.
I have since put it up on the shed wall up against the cold metal structure. All copper made. Brazed all of the joints.
Air enters from the left, goes up, then down to the first exit, the bottom is for expelling the water.
All works well, but have not used it long enough to trap any moisture. I will be adding another pneumatic air/water filter to it (when it eventually arrives).
I was limited to the amount of pipe I could use, but this is about 2 meters tall.
P73063000.jpg
Bill
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24th October 2014, 04:08 PM #43Senior Member
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I'm jumping on board this thread seeing as I've just gone and got a compressor. It's portable, so ideally I don't want a fixed solution. What about something like a Davies Craig Ultra-Cool tube/fin oil cooler:
http://www.daviescraig.com.au/Oil_Co...4-details.aspx
It's tested to 150psi so all good there (an older document from their website says 300psi). It isn't too restrictive like their plate/fin coolers:
http://www.daviescraig.com.au/Oil_Co...8-details.aspx
The plate/fin coolers are more efficient at removing heat, but I came across some stats page that showed pressure drop at certain flows, and they were all at < 10Lpm whereas I've got ~380Lpm. I think the tube/fin design wouldn't be too restrictive and I could combo it with a fan that turned on with the compressor pressure switch.
My only issue is that it's only about 2m of tube all up - is it big enough to be worth it in terms of condensing out the water? The catalogue says it can cool 12,000Btu/h, or roughly 3500W, which seems like quite a lot to me.
And where would I put it - after the tank and before the filter/regulator? Or after the compressor and before the tank?
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24th October 2014, 04:16 PM #44Senior Member
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If that's not big enough, Derale make some bigger ones with 10 passes made of copper/aluminium. Their website doesn't say what pressure they are rated to.
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24th October 2014, 11:55 PM #45Tool addict
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In case you didn't see my setup in the other thread, here it is.
Not sure how much copper is in the coil, it was about half of a large pack from Bunnings, so maybe 5m worth.
Filled with sand (slow, slow job), bent around a large diameter tube (laborious) and fitted in place (A bit touch & go).
The separator is the main bit - if you put a condensor before the tank without any way to bleed the water, it's a pointless excursion in my opinion, there'll still be a mist present. Might be able to get away with a small tap on a low point instead of a separator, I just wanted to go overboard at the time
Before doing it, I was having issues with moisture affecting the operation of my plasma cutter. The little separator/regulator 3m away from the tank just wasn't able to pull its weight it seemed.
After the setup, it's been perfect.
If you do go for one of those radiators, I'd consider putting a fan on it if it is used before the tank, because the entire coil does heat up after a few cycles on my setup.
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