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?
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.
drsmith Senior Member Joined: 8 May 2004 Posts: 178 Location: ny Expertise: I live coffee
Espresso: Mr Coffee Grinder: Crank by hand Vac Pot: n/a Drip: Bunn Roaster: Hearthware prec.; Whirley...
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.
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.
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.
snoboy Senior Member Joined: 4 Jun 2004 Posts: 452 Location: Rossland, BC Expertise: I love coffee
Espresso: famous Silvia... now PID Grinder: modded Rocky SD Roaster: SC/CO
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:
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.
Symbols: = New Posts since your last visit = No New Posts since last visit = Newest post
Forum Rules: No profanity, illegal acts or personal attacks will be tolerated in these discussion boards. No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum. No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum. Who Can Read The Forum? Anyone can read posts in these discussion boards. Who Can Post New Topics? Any registered CoffeeGeek member can post new topics. Who Can Post Replies? Any registered CoffeeGeek member can post replies. Can Photos be posted? Anyone can post photos in their new topics or replies. Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts. Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.
![TheArtfuldodger: Too-Hot.jpg](javascript:ImagePopup("/images/11378/Too-Hot.jpg", 640, 480, "TheArtfuldodger: Too-Hot.jpg");)
![CraigA: Pict0108.jpg](javascript:ImagePopup("/images/11379/Pict0108.jpg", 352, 288, "CraigA: Pict0108.jpg");)
![TheArtfuldodger: High-Pressure-PVC.jpg](javascript:ImagePopup("/images/11521/High-Pressure-PVC.jpg", 640, 480, "TheArtfuldodger: High-Pressure-PVC.jpg");)
![TheArtfuldodger: Roseman-Bean-Blower.jpg](javascript:ImagePopup("/images/11523/Roseman-Bean-Blower.jpg", 640, 559, "TheArtfuldodger: Roseman-Bean-Blower.jpg");)
= No New Posts since last visit 