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Homeroasters - Home Roasting Coffee Community » THE ART OF ROASTING COFFEE » Roasting Coffee

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Fast Cooler
metal	#1 Posted on 02/06/2006 6:48 AM
1/4 Pounder Posts: 81 Joined: February 05, 2006	Here are a couple pictures of a simple cooler. This unit cools up to 8 pounds of beans cool to the touch in under 5 min. The bowl is from a resturant supply. The fittings and hose from a pool supply. The trash can was chose for having a flat top to cut the hole for the industrial collander. With my roaster this helps remove the last bit of chaff also. Works great! This was a proto-type I used before building a more proffesional model. Hope this will help some of you who are trying to cool bigger batches. If this draws some intrest I may post the finished product.


framey	#2 Posted on 02/06/2006 7:05 AM
Newbie Posts: 2 Joined: January 28, 2006	Will the hot air from the beans eventually damage the motor of a shop vac? I'm not overly familiar with the airflow path... Is there going to be a plastic fan exposed to high temperatures?


metal	#3 Posted on 02/06/2006 7:08 AM
1/4 Pounder Posts: 81 Joined: February 05, 2006	The shop vac model above helped me design this stainless steel cooling bin. I am in the final stages of another proto-type that has stiring /blending arms. The new model actually samples the temp of the cooling beans 10 times a second then dumps the beans at 10 deg above ambient temp. I build the roaster with the option of no cooling bin. This saves people alot of money if they can build a shop vac model on their own


David	#4 Posted on 02/06/2006 7:46 AM
1 1/2 Pounder Posts: 690 Joined: October 27, 2005	Wow! That's some flashy-lookiing piece of equipment, Metalcrafter! What are it's dimensions? capacity? s:1 Edited by David on 02/06/2006 7:46 AM


metal	#5 Posted on 02/06/2006 8:21 AM
1/4 Pounder Posts: 81 Joined: February 05, 2006	roaster is 14w x 27h x 38L capacity 8 pounds green productivity approx 30 pounds an hour. I can do 1/2 pound today and get up tomorrow and roast 300 lbs. I have a 33 pound Toper and I would rather use this all day than ten loads in the bohemoth that takes nearly twice the fuel per pound. Guts are a little like old school probat with a twist or two I understand.


David	#6 Posted on 02/06/2006 8:49 AM
1 1/2 Pounder Posts: 690 Joined: October 27, 2005	Quote framey wrote: Will the hot air from the beans eventually damage the motor of a shop vac? I'm not overly familiar with the airflow path... Is there going to be a plastic fan exposed to high temperatures? That's a great question. I have heard stories of melted hoses on shopvac coolers and having the large bucket/drum under the colander seems to have been the solution. But, for an 8 pound roast....that's a lot of heat. I have used a lawn leaf blower to cool roasts up to 1 kilogram. I usually have it upside down so the air draws in through a colander. (See picture) After a hundred uses, I think I see some effects on the plastic impeller. I have started to use the exhaust end of the leaf blower lately. For this, I put a second colander over the first to make an dome and hold the "dome" in front of the output business end of the blower. Talk about Rollerdome!! The beans swirl about and a kilo gets to ambient temp in under two minutes. I think I could go up on the capacity of the Rollerdome quite a ways before I'd hit its limit. (no picture of that one yet.) David attached the following image:


metal	#7 Posted on 02/06/2006 9:47 AM
1/4 Pounder Posts: 81 Joined: February 05, 2006	Quote That's a great question. I have heard stories of melted hoses on shopvac coolers and having the large bucket/drum under the colander seems to have been the solution. But, for an 8 pound roast....that's a lot of heat. the shop-vac unit here is somewhat of a heat/exchanger/ambient mixing chamber...I cooled nearly a ton (green weight) of beans with this set-up before moving on. I don't have temperatures of this test, but can say the surface of the garbage can, hoses, shop-vac have been only warm to the touch. I used no filter in the vac, the only ill efect to the impeler seems to be a little cafe' oil. I like the rollerdome idea! s:2 any problems with bean damage from rapid cool or high velocity?

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