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10/15/2021 2:19 AM
merlot85, maycondelpiero and hoeltz, Welcome !

10/14/2021 10:06 AM
Thanks for the addition to the group. Seriously considering building a drum roaster along the lines of oldgrumpus's. Love the design and craftsmanship.

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Bounce house blower for bean cooler?
Scooter Dog
Has anybody used a bounce house blower for a bean cooler? I roast 10lb batches and have a 24"x18" cooling tray that sits in a wooden box. I currently have a large bathroom exhaust fan that moves about 200 CFM. This setup worked pretty good until it started getting hot this summer. I found some used bounce house blowers that move 350 CFM that are pretty cheap. I was also considering a leaf blower, but I don't think they handle pressure as well and they a pretty loud too.

Thanks,

Daniel
Koffee Kosmo
That is overkill
I would recommend a 12 volt raidiator fan
They can handle the heat as they are normally bolted onto the radiator and operate in a heated engine compartment

Sometimes they are also available with metal blades
You can also use two fans in tandem

KK
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...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.
Scooter Dog
I looked into radiator fans... They move more CFM, but cand they handle sucking through the bean mass? Also, converting 120v AC to 12v DC gives me a little worries.
Koffee Kosmo

Quote

Scooter Dog wrote:

I looked into radiator fans... They move more CFM, but cand they handle sucking through the bean mass? Also, converting 120v AC to 12v DC gives me a little worries.


You will find that those fans are capable and are able to handle up to 24 Volts
So a high amp 5 + computer power supply may be the ticket

KK
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...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.
Scooter Dog
Thanks KK,

I found a 9 inch radiator fan on ebay for less than $20.00 and it is 12V/24V 80 watts. I looked around and found a Dell laptop docking station power supply that is 19V and putts out 88 watts.

I'll reply back and let you know how it goes.

Dan
oldgearhead
You can buy a small shop vac for $30 and it's very useful for other things.
oldgearhead attached the following image:
coffeecooler3_8.jpg

No oil on my beans...
Ringo
Go to a shop that installs heaters and ask for a used blower, they will sell you one very cheap. I think mine was $20. Made to move lots on air with high pressure. I can cool 6 pounds in 30 seconds to 45 seconds.
All you need in life is ignorance and confidence, and then success is sure. Mark Twain
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