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Warning Shop Vac brand bean cooler...
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TheArtfuldodger
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TheArtfuldodger
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Posted Thu Sep 30, 2004, 9:47am
Subject: Warning Shop Vac brand bean cooler...
 

This morning I roasted three pounds Sumatra Mandeling in my BBQ roaster. Everything went as planed. Roasted to Full city+ pulled drum dumped into my shop vac bean cooler
to cool. The smoke was pouring out of the shop vac then I noticed it slowed suddenly that when I saw the plastic hose had collapsed on it self and restricting the flow of air.

The moral of this story is roasted coffee is hot! And Plastic melts.

I have a 4.5 HP Shop Vac brand vacuum. I guess it is back to the drawing board. I think I'll try PVC or maybe pick up an old vacuum hose at Goodwill. Any suggestions?

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CraigA
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CraigA
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Posted Thu Sep 30, 2004, 10:02am
Subject: Re: Warning Shop Vac brand bean cooler...
 

Hi George, Maybe match it up to the smallest aluminum flexible clothes dryer vent tubing, (3" I.D.) with the appropriate swadged reducer coupling to match your application.

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drsmith
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Joined: 8 May 2004
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Posted Sat Oct 2, 2004, 6:10am
Subject: Re: Warning Shop Vac brand bean cooler...
 

CraigA Said:

Hi George, Maybe match it up to the smallest aluminum flexible clothes dryer vent tubing, (3" I.D.) with the appropriate swadged reducer coupling to match your application.

Posted September 30, 2004 link

I'd have to agree with this suggestion.  However, do make sure you stretch out that hose to it's maximum length so the air can cool off before it hits the shop vac's internals.  Wouldn't want to melt the shop vac's motor housing.

If you want to take this to the geekiest limit,  there's a heat exchanger that's sold for wood stove flu's.  It's basically a sheet metal box with a bunch of tubes run through it and a fan to push room temperature air through the tubes.  The idea is to recover heat that would other wise be run up the chimney and lost to the great outdoors in the winter.  With some adapters, you might be able to put this in the line going to the shop vac.
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ljguitar
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Posted Sat Oct 2, 2004, 8:46am
Subject: Re: Warning Shop Vac brand bean cooler...
 

Wow George!
Melt down city...the pvc idea sounds interesting. No reason it shouldn't work as long as the pvc can withstand the heat without producing any kind of toxic gaseous release.

You made me think about a different cooling arrangement if I decide to increase capacity over 1/2 pound batches.

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snoboy
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Posted Sat Oct 2, 2004, 9:01am
Subject: Re: Warning Shop Vac brand bean cooler...
 

I have been thinking about this, and figure that when I get around to larger batches, I am going to build something that incorporates a fan built from this book:

Lindsay Books check out the second one on the page.

Lots of other good books for tinkerers available from these guys.

I envision a centrifugal fan on it's side, with a colander sitting in a gasketed hole built into the casing. Maybe something to stir??
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brokencup
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Posted Sat Oct 2, 2004, 9:21pm
Subject: Re: Warning Shop Vac brand bean cooler...
 

George,

Reverse the flow and blow air through the beans instead of sucking into the vac.

Bob
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TheArtfuldodger
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TheArtfuldodger
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Posted Tue Oct 5, 2004, 10:40am
Subject: Re: Warning Shop Vac brand bean cooler...
 

Went to Lowes found some high pressure flex PVC. Looks like it would have no problem handeling the tempreture of the beans.

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TheArtfuldodger
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TheArtfuldodger
Joined: 28 Jun 2004
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Location: Waxhaw,NC
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Posted Tue Oct 5, 2004, 10:53am
Subject: Re: Warning Shop Vac brand bean cooler...
 

Today is roasting day I have five and a half pounds of coffee to roast. The more I think about the temperature of my beans I wonder how long my shop vac motor will be able to deal with the heat. I could increase the length of hose to give the air time to cool or take Bob's advice and reverse the air flow and blow air threw the beans.
I like the idea of sucking the air threw the beans the bucket catch all the chaff. But I also like my shop vac. So folks I now have a Roseman Bean Blower. It's a little messy. Chaff blowing all over the garage but I guess the leave blower will take care of that.

George

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JonR10
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Posted Tue Oct 5, 2004, 11:05am
Subject: Re: Warning Shop Vac brand bean cooler...
 

TheArtfuldodger Said:

So folks I now have a Roseman Bean Blower. It's a little messy. Chaff blowing all over the garage...

Posted October 5, 2004 link

LOL!!!  

Would it work to place a second empty collander upside-down on top of the beans to act as a chaff collector and reduce your mess?

 
Jon Rosenthal
Houston, TX
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TheArtfuldodger
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TheArtfuldodger
Joined: 28 Jun 2004
Posts: 629
Location: Waxhaw,NC
Expertise: I live coffee

Espresso: Saeco Classico W/ non...
Grinder: Macap-4,Zassenhaus Box
Vac Pot: Vintage, Cory, Bodum and...
Drip: Bodum French Press
Roaster: Hot Top-RK Drum
Posted Tue Oct 5, 2004, 11:23am
Subject: Re: Warning Shop Vac brand bean cooler...
 

JonR10 Said:

LOL!!!  

Would it work to place a second empty collander upside-down on top of the beans to act as a chaff collector and reduce your mess?

Posted October 5, 2004 link

That would take all the fun out of it.
What must the neighbors think? Smoke and chaff pouring from the garage. :).
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