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Posts uit december, 2021 tonen

Roasting Ethiopia Limu Mansur / energy use

Afbeelding
Batch 24: Came out a littke light at Tonino #101 but good development time, beans looking good too.   Lowest energy use so far.

Roasting Ethiopia Sidamo Bensa Natural Bombe beans / energy use

Afbeelding
 A shorter roast than some other beans, hence a little less energy use The date info on the Fritz!DECT210 is not always correct. Sometimes the energy use appears 'stacked' on the column of the previous day and then the next day moved to that new day even if I didn't roast at all that day.

LONDINIUM LR24 Low-High preinfusion

Afbeelding
The Ethiopian beans I have in one of my grinders are delicious but can extract a little 'thin' so this time I did a long pre-infusion at a low pressure: Then, as Bob's little mirror showed that the bottom of the filter basket filled with droplets, I swiped up the pre-infusion pressure to 5bar and raised the lever. Out came a creamy full bodied delight:

Roasting Guatemala with an eye on energy use

Afbeelding
First tweaked the sliders in Artisan to heat up the machine with a lower airflow, keeping more heat inside the machine. This cost 0.087 kWh Warmup started at 19:31 for 15 minutes, using 0.686 kWh CHARGE happened at 19:47. Shortly after, energy use declines as ever less heat is needed. FC at 19:58 DROP at 20:01 after using 1.264 kWh Cooling of the roasted beans took 2 minutes Switched OFF the roaster at 20:05 having used a total of 1.274 kWh for the roast of 1700g green beans Batch 8: Start warmup 16:04 CHARGE 16:19 at 0.732 kWh DROP 16:34 1.272 kWh Machine OFF 16:35 1.277 kWh B9 on 27 dec 2021: ON 19:15 CHARGE 19:29 at 0.667 kWh DROP 19:44 at 1.24 kWh OFF 19:45 at 1.246 kWh batch 10, 1500g green: batch 11, 1500g: Warmup 0,63 kWh FC at 1,132 kWh OFF at 1,212 kWh

Roasting PNG with an eye on energy use

Afbeelding
  I pre-heated the FZ94 more than before to see if I could save energy overall. I used a bit more energy actually. Maybe I can lower the fan during warmup, because the fan sucks hot air out of the machine into the exhaust. I do want some airflow though, to ensure an even distribution of the heat. Taking care its not just the bottom of the machine getting hot. Switched the machine on at 18:02 After warmup, 0.9 kWh had been used. Gradually, the heater power declines from 2800W to 2000W during roasting.  1t 18:35 I DROPped the beans at 1.389 kWh used After roasting, the machine with just some airflow and drum rolling takes 180W 13 December roast total 1.305 kWh : Warmup started 19:46, ready in 14min, 0.641 kWh FC 20:12 after 12min, 1.137 kWh DROP 20:15, 1.278 kWh COOL ending at 1.305 kWh B4: 1.21 kWh Batch 5: batch 6 (1500g) Warmup took 0.667 kWh FC at 1.067 kWh OFF at 1.213 kWh

Bob's Espresso Flow Monitor

Afbeelding
 

Lever magazine #4 is out!

Afbeelding
  But what is meant by a 'trick with sugar granules' here?

Tracking roasting energy consumption

Afbeelding
    I got a little Fritz!Dect210 device that's able to pass enough kW to feed my FZ94 roaster and now I can track its energy use.The most recent roast of 1700g Ethiopian beans took 1.3kWh.The device provides interesting graphs: Roasting all in all took about half an hour. Warmup starts around 20:04 at full power and Voltage drops from about 232V to 224V. First part of the roast is full power also, then as the heater gradually takes less power, the Voltage rises. After the heating elements shut down, power useage drops steeply and the cooling fan briefly takes some extra power.  On Nov 25 I did one roast, next day two roasts, on Dec 2 one roast that consumed 1.315 kWh Last night room temp gradually dropped and after we woke up the room got warmer. When I started roasting and opened windows and doors, the room cooled down. After the end of the roast I let the roaster cool down and the exhaust pipe blew out hot air from the drum near the Fritz! which assumed the room got quite hot (b