I modified a Breville Dual Boiler with an ultrasonic transducer-horn to make cold brew in three minutes
I modified a Breville Dual Boiler with an ultrasonic transducer-horn to make cold brew in three minutes
by unsw
6 Comments
unsw
Hi all, I’m Francisco Trujillo a researcher here at UNSW borrowing our Reddit account to share this very unique project I’ve been working on for the past five years studying the effects of ultrasound on coffee brewing.
The idea behind the project was to bring the brew time for cold brew down from 24 hours to just a few minutes and we achieved this by modifying a Breville Dual Boiler with an ultrasonic transducer-horn designed to inject sound waves at 38.8 kHz through the walls of a filter basket of the espresso machine.
The ultrasound created by the transducer-horn induced waves through the walls of the filter basket due to resonance, transforming the filter basket into a very potent ultrasonic reactor – Speeding up the extraction process and yielding brews with the same unique flavours and aromas of cold brew much quicker than the normal steeping process.
The pics and videos in the post above show some of our prototypes, an example of how the ultrasonic treatment affects the grinds in the basket and of course some examples of the pulls we’ve been getting!
We’ve had samples from the ultrasonic process analysed against normal steeped cold brew and the results are really promising with our one and three minute brews exhibiting very similar properties to the steeped sample.
Let me know if you have any questions about the project or the ultrasonic process!
bijouxself
“But how does it taste?”
chowder-san
Ultrasonic coffee. Sounds incredibly cool
Evening-Nobody-7674
Sounds cool, couple questions for you.
1) If you are making cold brew, does that mean you killed the power to the coffee boiler and are just using pump pressure to move water through the portafilter?
2) How are you measuring the effectiveness between the different extraction processes?
6 Comments
Hi all, I’m Francisco Trujillo a researcher here at UNSW borrowing our Reddit account to share this very unique project I’ve been working on for the past five years studying the effects of ultrasound on coffee brewing.
The idea behind the project was to bring the brew time for cold brew down from 24 hours to just a few minutes and we achieved this by modifying a Breville Dual Boiler with an ultrasonic transducer-horn designed to inject sound waves at 38.8 kHz through the walls of a filter basket of the espresso machine.
The ultrasound created by the transducer-horn induced waves through the walls of the filter basket due to resonance, transforming the filter basket into a very potent ultrasonic reactor – Speeding up the extraction process and yielding brews with the same unique flavours and aromas of cold brew much quicker than the normal steeping process.
https://preview.redd.it/hekmly2xzvyc1.jpeg?width=2479&format=pjpg&auto=webp&s=22b2f31eb496df6a964a379fec4e9dc7ed4dfd93
The pics and videos in the post above show some of our prototypes, an example of how the ultrasonic treatment affects the grinds in the basket and of course some examples of the pulls we’ve been getting!
We’ve had samples from the ultrasonic process analysed against normal steeped cold brew and the results are really promising with our one and three minute brews exhibiting very similar properties to the steeped sample.
Let me know if you have any questions about the project or the ultrasonic process!
“But how does it taste?”
Ultrasonic coffee. Sounds incredibly cool
Sounds cool, couple questions for you.
1) If you are making cold brew, does that mean you killed the power to the coffee boiler and are just using pump pressure to move water through the portafilter?
2) How are you measuring the effectiveness between the different extraction processes?
I thought I was on r/vxjunkies for a second
