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Best Cooling Design
Tony_C
Top  #1 Print Post
Posted on 11/18/2015 10:03 PM
So from everyone's experience, which direction cools better, using a vacuum to pull air through the beans? i.e. Open air on the beans end, pulling into a closed space... Or using a fan to blow upwards through the beans?

I want to make a 5 gallon bucket type cooler. I see the simplest end of the spectrum being a colander on top with a hose leading to a vacuum drawing air downwards through the beans. This both collect smaller particles of chaff as well as cooling the beans. But wonder if it is faster or more efficient to cool by blowing air up into the beans using a fan. I only ask because of experiencing a slower manual cooling on a Colombian, and actually seeing the beans further roast a bit and darken while cooling.

Or is this just over thinking it?
 
Koffee Kosmo
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Posted on 11/18/2015 10:48 PM
This is my design on the link - http://forum.home...ad_id=1183

Its never let me down

KK
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://homeroast...ad_id=1142

https://docs.goog...lide=id.i0
Blog - http://koffeekosm...gspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
 
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Tony_C
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Posted on 11/19/2015 10:03 PM
Very nice...very nice indeed. I like that it is pulling the air through the beans downwards, and the holes at the bottom increase the airflow and circulation.

That gives me a good idea. Thank you KK!
 
Koffee Kosmo
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Posted on 11/20/2015 7:53 PM
For the top section
I now use two wire sieve units with different size holes

They are commonly called soil sieves
https://en.m.wiki...es_BMK.jpg

KK
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://homeroast...ad_id=1142

https://docs.goog...lide=id.i0
Blog - http://koffeekosm...gspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
 
Web
Tony_C
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Posted on 11/20/2015 11:00 PM
Ooooo, those are nice. Are those available retail in the states?
 
comfortableshoes
Top  #6 Print Post
Posted on 11/20/2015 11:44 PM
You can use cake dusting pans, they don't come with the super large gauge openings but you can get them on amazon and they are a similar design.
 
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Koffee Kosmo
Top  #7 Print Post
Posted on 11/20/2015 11:46 PM

Quote

Tony_C wrote:

Ooooo, those are nice. Are those available retail in the states?


They were probably invented in the States for the gold rush

My father in-law gave me my 2 units

KK
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://homeroast...ad_id=1142

https://docs.goog...lide=id.i0
Blog - http://koffeekosm...gspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
 
Web
Tony_C
Top  #8 Print Post
Posted on 11/21/2015 9:15 PM
Cool, thanks both of you!
 
oldgearhead
Top  #9 Print Post
Posted on 11/29/2015 8:44 AM
This one is six years-old. It's made from a PVC pipe fitting
(5x5x2). I wanted something that would out-last a plastic bucket. I don't use it to cool anymore, but I use it as a cleaner and blend tool.
oldgearhead attached the following image:
coffeecooler3_6.jpg
No oil on my beans...
 
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