Probe Placement and Bean Mass Question

[SusanJoM]

But my temp-curves are not really comparable with other Huky users.

That is the most noticeable difference I noted when I roasted 150 gm in the perforated drum last week.  The roast is fine;  the profile is fine;  it just doesn't compare to anything anyone else is seeing, which means the learning can't be shared the way it can when we are all doing the same stuff.  It's more interesting, though....:-)))

[CGwynne]

Fantastic work beananimal!

I'm struck not only by how the BT could be better placed with all the charge amounts, even with 500g it's less than ideal and not as submerged in the bean mass as could be, but additionally the ET is not as unmolested by beans as I would hope and might consider moving that too.

Edit: Should add that I can see there's clearly room for a trier with a slightly larger diameter. Trying to pull enough samples to cup takes 5 tries

[beananimal]

Hello, here is the next set of "Mr. bean - videos":
Without probe, to see the undisturbed bean flow. The bean trier is inside the tunnel at the begin and in the second half it is in the normal position.

Just remember, there is a circle in the frontplate showing the inside diameter of the blades, in the middle of the drum. Directly at the frontplate the free diameter is a bit larger as the blades are a little bit less high, which adapts in form of a conus.

Huky, 100g, green beans, 72 rpm, solid drum, no probe, at start no trier, at end with trier, S2, 2017-02-22
https://youtu.be/Un_PEyrTnb0

Huky, 150g, green beans, 72 rpm, solid drum, no probe, at start no trier, at end with trier, S2, 2017-02-22
https://youtu.be/_jdLWQjJ5PE

Huky, 250g, green beans, 72 rpm, solid drum, no probe, at start no trier, at end with trier, S2, 2017-02-22
https://youtu.be/Su0tV9fcYtw

Huky, 330g, green beans, 72 rpm, solid drum, no probe, at start no trier, at end with trier, S2, 2017-02-22
https://youtu.be/WNWU8kf8qVI

Huky, 400g, green beans, 72 rpm, solid drum, no probe, at start no trier, at end with trier, S2, 2017-02-22
https://youtu.be/PvlIIMlkh10

Huky, 500g, green beans, 72 rpm, solid drum, no probe, at start no trier, at end with trier, S2, 2017-02-22
https://youtu.be/niMNuGpSL-k

[beananimal]

Fantastic work beananimal!

I'm struck not only by how the BT could be better placed with all the charge amounts, even with 500g it's less than ideal and not as submerged in the bean mass as could be, but additionally the ET is not as unmolested by beans as I would hope and might consider moving that too.

Edit: Should add that I can see there's clearly room for a trier with a slightly larger diameter. Trying to pull enough samples to cup takes 5 tries

I just checked the diameters inside = space between the blades:
For everything that is longer than 5cm, the available diameter is ~65mm.
For shorter probes (or trier) as the diameter increases about 0,5cm / cm, I can say that for a 3cm long probe you could use an inner diameter of 75mm.

If you are going to drill just take care: This is not the center point for drilling!
And personally I would plan a clearance of minimum of 5 mm to avoid high forces from the blades onto the probe.

[Brent]

For some reason, those last set of links are FTP protocol, rather than HTTP.  I replaced the FTP with HTTPS and they worked

[beananimal]

As the links seem to be broken in my former text,
I put it here again and hope it will work:

This set is without probe, to see the undisturbed bean flow. The bean trier inside the tunnel at the begin and in the second half it is in the normal position.

Huky, 100g, green beans, 72 rpm, solid drum, no probe, at start no trier, at end with trier, S2, 2017-02-22
https://youtu.be/Un_PEyrTnb0

Huky, 150g, green beans, 72 rpm, solid drum, no probe, at start no trier, at end with trier, S2, 2017-02-22
https://youtu.be/_jdLWQjJ5PE

Huky, 250g, green beans, 72 rpm, solid drum, no probe, at start no trier, at end with trier, S2, 2017-02-22
https://youtu.be/Su0tV9fcYtw

Huky, 330g, green beans, 72 rpm, solid drum, no probe, at start no trier, at end with trier, S2, 2017-02-22
https://youtu.be/WNWU8kf8qVI

Huky, 400g, green beans, 72 rpm, solid drum, no probe, at start no trier, at end with trier, S2, 2017-02-22
https://youtu.be/PvlIIMlkh10

Huky, 500g, green beans, 72 rpm, solid drum, no probe, at start no trier, at end with trier, S2, 2017-02-22
https://youtu.be/niMNuGpSL-k

[SusanJoM]

Thank you for re-loading these links.
If anything else got lost in the software update, please let me know.

[beananimal]

No new videos, but some pictures on an additional probe



Meanwhile I got some additional shorter probes. Type K, 10mm and 17mm length.
They are diameter M6 to allow smaller holes.



https://www.sensorshop24.de/temperaturfuehler/einschraubfuehler-mit-kabel/einschraubfuehler-mit-einem-m6-gewinde/einschraubfuehler-mit-m6-gewinde-und-17mm-einbaulaenge-bis-550-c-15df65d/a-40149/

The 10mm is for the exhaust pipe, right above the elbow, to have an integrative air temperature without local air flow effects. I used already a cable-type-probe in the U-pipe, but this is inconvenient for beans filling in and the recorded chart shows funny temperature curves as the U-pipe must be removed for several seconds.



The 17mm version is for the BT readings closer to the blades, deeper in the beans. I drilled a hole 35mm left from the axis and it looks fine. (the original BT is 20mm from the axis). The tip is still about 6mm away from the blades and there is no long parallel narrow corridor for the beans.
The height is more or less the same as a deeper position is occupied by the bean outlet flap and according to the former pictures it seem to be not really critical as the beans are climbing up very hight with the rotation of the drum.

For solid drum Huky, the 17mm probe version would be good to place it in the Huky rear plate, at the lower edge of the drum, to measure the inlet air temp. A delta-curve between inlet and outlet could show if the Huky is really heated-up, or the effects of exothermic first crack effects.



But for any comparison of temperatures readings of different BT-probe places or air temp probes, a calibration in ice-water and boiling water will be necessary, to get reasonable results. This is for mid-term planning.



For further experiments it will use this perforated drum. To allow 72 or 48 rpm or any other drum speed, I have now a power supply with different voltage.

[beananimal]

Bean mass distribution
As we could see in some videos, it seems that there are much more beans close to the front plate than at the rear end of the Huky.


Now with the clear view through the Huky from front or from back side, I have to apologize to Mr. Li.
At least for full load (I had a run with 500g of green beans today) the distribution front to back is at the same level, although it look different if you are looking only from the front side into the Huky.