🍵 😮
The ultrasound creates a phenomenon called acoustic cavitation, which is a rapid formation and collapse of microscopic bubbles in the liquid. When these tiny bubbles collapse near the coffee particles, they act like microscopic scrubbing brushes or jets of liquid, pitting and fracturing the coffee grounds and accelerating the bewing process.
That is such a cool use of an observed phenomenon.
Just what we needed, merging of the espresso nerd and audiophile demographics.
😆
A few months ago I saw a video of someone who used an ultrasonic cleaner to make extracts, so i tried it. I did 30 - 60 mins for each of orange peel, banana peel, pepper corn, anise, vanilla bean, cinnamon, and coffee. The coffee smelled absolutely disgusting, but this was like an hour rather than 3 mins. I had no idea how much time was appropriate. I also used vodka instead of water. Idk why I thought the coffee would work. The rest seem roughly what I’d expect. I’ve done traditional extracts previously. It makes sense to try water for coffee. I feel dumb for not trying that obvious combination.
sounds like the thought emporium?
The video that I watched? It was from How to Drink, which iirc he said he decided to try and make his video after watching a video that talked about speeding up extracts via ultrasonic cleaner, but I don’t recall what he said what was the video he watched.
They better have used The Hottest 100…
lol imagine you got different versions, turn on the coffee machine, start hearing a little ac/dc playing from inside it 🤣
I wonder if an AccaDacca brew tastes different to an Air Supply brew lol
I wonder how well it would work for tea
Is coffee-brewing energy use even remotely a concern?
Depends what context. For environmental reasons it’d be a negligible impact, but every bit counts. From a business like Masters Coffee Chill probably a nice little boost to productivity by swapping ongoing electricity costs for a one time capital allocation and 25% the ongoing cost for brewing than before.
I suppose for matketing 'green’credentials its technically useful as well, but you’d not design a whole campaign around it otherwise you’d leave yourself open to credible allegations of greenwashing.
The cost of brewing includes the machine cost over its lifetime. The electricity cost is near zero.
Apparently yes because of all the different products made from brewed coffee. 🙅♀️
Ah yes the most important thing to save energy on: the 1500 watt appliance that’s on for 15 minutes daily.
Well, in the home it is, but this is more likely to be impactful for coffee shops. We might end up surprised at where tech like this could take us, even if it doesnt go far in the barista world
Professional espresso machines have to keep ~10L of water at boiling for the entire day. This absolutely could save a lot of energy.
The first thing I thought of: The Hardcore Coffee Machine https://www.youtube.com/watch?v=i5OYQOyceoM
Second thing was:
Dutch startup BlueHeart Energy is testing its thermoacoustic heat pump engine in residential settings, with a limited European launch expected in spring 2027, followed by gradual scaling. The system uses sound waves instead of refrigerants, aiming for quiet, flexible, low-maintenance heating suited especially for retrofits and renewable integration.
But back to the original article:
Saving up to 75% of energy by not heating the water is a minor benefit for home users or small coffee shops. But for companies making ready-to-drink coffee products at industrial scale, it could be very significant indeed.
I was going to say that my coffee machine runs off solar/battery so no use here but I’m certain a good majority of coffee shops are not running on solar or solar battery and this would be amazing
Here’s hoping they can commercialise it
That heat pump is an interesting read. Thank you for the link.
They recently started doing this with whisky first and i thats when i wanted to go down the path of trying it on all of types of liquids but never had the time or money to do it.
The essence of convection “without” heat?
