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How do you cool your beans?

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  • How do you cool your beans?

    Anyone feel like sharing their external cooling methods?

    This takes about 2-3mins to cool a 300-400gm (Behmor) charge down to around 30C (gestimate).

    Click image for larger version

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  • #2
    I use to use a dust extractor, flexi duct, a cardboard box (bigger enough to house a stainless steel sieve cut in the top). I would seal the box and sieve with duct tape, duct would go from dust extractor to cardboard box which i would also seal off with tape.
    Pour the beans onto the sieve after roasting and turn the dust extractor on and stir a few times. Cools down in about a 1-1:30min.

    This was cooling 2kg of coffee.

    Worked effectively

    Chris

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    • #3
      Large stainless steel colander, hairdryer set on cool, hand strirred with a wooden paddle.
      I do batches of about 500g once a week. Takes 3-4 minutes to cool.

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      • #4
        I press cool on the behmor and crack open the door! :-)

        Previously had a stainless sieve sitting in a bathroom extraction fan (sucking air).

        Prior to that I had a garden blower vac. Cut down the suction tube, cut a hole in a bucket to suit and placed a sieve inside the bucket. Cooled them in less than a minute. Bloody noisy though! And once the sieve moved and it sucked in some if the beans, sprayed the garage with grounds!!!

        Cheers

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        • #5
          40cm baker's sieve that sits inside a plastic plant pot with a bathroom exhaust fan below the sieve to sucks air through the roast.

          It was almost as if the plant pot was designed to hold the sieve. It has an inside diameter slightly larger than the sieve and a ridge that runs just below the rim of the pot that the sieve sits neatly on. Works brilliantly to cool the beans in about 2 mins.
          Click image for larger version

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          • #6
            Lots of good info to be found here...
            http://coffeesnobs.com.au/home-roast...step-step.html

            Took three seconds to find using the Search Tool above...

            Mal.

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            • #7
              Just did some quick and dirty research on volume of air moved:

              My cordless makita, ~ 2.5m3/min
              Exhaust fan, ~ 4-6m3/min
              Electric or petrol blower-vac, ~ 12-15m3/min
              Dust extraction ~7-20m3/min

              Hmm, I have a 240v blower not doing much....

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              • #8
                I dont know about the rest but i was lucky enough at the time to pick up a dust extractor for $50.

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                • #9
                  My homemade cooler can be seen on youtube: https://www.youtube.com/watch?v=NYzh4kCqcJU

                  I also have my homemade one plus pound roaster posted there too: https://www.youtube.com/watch?v=DWZp_85vGsQ

                  See:
                  http://www.bobbooks.net
                  Last edited by bobbooks; 22 August 2016, 01:37 PM.

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                  • #10
                    Here's a pic' of mine...
                    Cools ~630g of roasted beans to just above ambient in about 45 seconds. Air is pulled through the bean mass...

                    Base is a round kitchen tidy/bin, fan is a standard bathroom vent' fan and screen is a prospector's grading screen with 3mm mesh. Works a treat...

                    Mal.

                    Click image for larger version

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                    • #11
                      Version 2: Bean cooler using a blower vac. This baby sucks so hard I have to wear ear muffs. Goes from 200C down to 16C (ambient) in around 30sec. I want to roast just so I can use it!

                      Click image for larger version

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                      Last edited by MrFreddofrog; 5 September 2016, 06:51 AM.

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                      • #12
                        ingenious!

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                        • #13
                          Mine's as quiet as a whisper...

                          Mal.

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                          • #14
                            I had a blower vac cooler but switched to a bathroom fan. I do most roasts in the evening and the jet engine noise wasn't too welcome late at night. Was crazy fast though!

                            Cheers

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                            • #15
                              Originally posted by Dimal View Post
                              Mine's as quiet as a whisper...

                              Mal.
                              Spot on Mal.

                              My cooler is a 20 liter bucket with grading sieve using an exhaust fan, cools real fast and like Mal's, barely audible.

                              First posted details with pics on Coffee Snobs about 7 years ago.
                              Attached Files

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