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Cold brew coffee in 3 minutes using acoustic cavitation

unsw.edu.au

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Re: Cold brew coffee in 3 minutes using acoustic cavitation

#291

Post by WilTimSon »

solardev wrote: post #225
dahart wrote: post #17

Recently I discovered that many coffee shops, maybe half in my sampling of a couple dozen in different cities, are selling cold coffee (brewed hot, then refrigerated) under the name cold brew, and even the ones that actually cold-brew them seem to be under the impression that it needs to be served cold. I was laughed at in one hipster joint for asking for a steamed or warmed cold-brew, and another one initially refus…

This is why I love my fully automated luxury mediocre espresso maker ( https://www.seattlecoffeegear.com/blogs/scg-blog/jura-a1-rev... ). I push a button, it grinds the coffee and does stuff inside that I can't see, then moments later I have a perfectly average cup of something resembling burnt bean soup. I don't know whether it's megasonically brewed or absolute-zero infused or just wet caffeine pills. Sometimes it'…

Well, you're lucky to not have spoiled your palate, in a way. I learned to love good coffee through my friends and I now only drink regular espressos from a machine if there's no other choice. And I'm not being snobby or anything, I fully understand why people drink it, I used to do it all the time. But my friends had to go and teach me about brewing methods and beans and yadda yadda.

Friend of mine had a similar issue where his parents were wine people and, ever since he could drink, taught him how to pick good wine. Except he realised he does not want to pay that much for alcohol so he now just sticks to beer.

Re: Cold brew coffee in 3 minutes using acoustic cavitation

#292

Post by beAbU »

ChrisMarshallNY wrote: post #240
solardev wrote: post #225

Earlier quoted context omitted.

This is why I love my fully automated luxury mediocre espresso maker ( https://www.seattlecoffeegear.com/blogs/scg-blog/jura-a1-rev... ). I push a button, it grinds the coffee and does stuff inside that I can't see, then moments later I have a perfectly average cup of something resembling burnt bean soup. I don't know whether it's megasonically brewed or absolute-zero infused or just wet caffeine pills. Sometimes it'…

Friend of mine, with money , has a coffee machine, by a company I’d never heard of, called “Jura”[0]. I’d not heard of it, because it’s not for plebes, like me. Grinds and brews a perfect cuppa in about a minute. I used to have a toddy maker, where you dumped a whole pound of ground coffee into a bucket of water, let it sit overnight, in the fridge, then you drained through a filter. The resulting thick liquid was li…

We have 2x Juras in my office. They cost a significant portion of my annual salary last time I checked.

Reliable, repeatable, the coffee is not super duper excellent, but it's also not terrible. It's perfectly passable and it's free. My type of coffee.

Re: Cold brew coffee in 3 minutes using acoustic cavitation

#293

Post by paulcole »

janalsncm wrote: post #195
deadlydose wrote: post #118

Earlier quoted context omitted.

Risky to buy? It's not real estate it's a cup of coffee. And if you're worried about people faking it, just buy a $2 mason jar and make some in the fridge while you sleep. I don't get the fascination with paying exorbitant prices and constantly complaining when it's next to zero effort to make it at home, cold or hot. And the best part is you get to choose where your beans come from, you don't have to worry about the…

Yes, risky to buy. In the same way a slot machine has an expected value of 80-99% payout it’s still a bad use of money even if you only put in $5. If you object to the word “risky” I used it in the sense of “uncertain you will get the value you expected”. Perhaps there’s a better word.

> In the same way a slot machine has an expected value of 80-99% payout it’s still a bad use of money even if you only put in $5.

Why is this a bad use of money? When I go to a restaurant and give them $20 for dinner, it’s not like I’m getting $20 worth of ingredients.

It sounds like you just don’t like gambling?

Re: Cold brew coffee in 3 minutes using acoustic cavitation

#294

Post by throwaway2037 »

m463 wrote: post #134
dahart wrote: post #17

Recently I discovered that many coffee shops, maybe half in my sampling of a couple dozen in different cities, are selling cold coffee (brewed hot, then refrigerated) under the name cold brew, and even the ones that actually cold-brew them seem to be under the impression that it needs to be served cold. I was laughed at in one hipster joint for asking for a steamed or warmed cold-brew, and another one initially refus…

I've been doing cold brew for a while now. There seems to be two ways to cold brew coffee. The more traditional method (like in the toddy system) uses paper filters, and the newer method uses reusable metal filters. They are slightly different. the paper filters remove the oil, while the metal filters let it through. I suspect this might have flavor/aroma effects. I also read because of the oils, the metal filter met…

I did a double take here:

    > higher on cholesterol
As I understand, cholesterol only occurs in animal products. That is why vegan diets are cholesterol-free. Zero trolling here: I assume that coffee beans are animal-free.

Google tells me:

    > Though brewed coffee does not contain actual cholesterol, it does have two natural oils that contain chemical compounds -- cafestol and kahweol -- which can raise cholesterol levels. And studies have shown that older coffee drinkers have higher levels of cholesterol.

Re: Cold brew coffee in 3 minutes using acoustic cavitation

#295

Post by Cthulhu_ »

ChrisMarshallNY wrote: post #240
solardev wrote: post #225

Earlier quoted context omitted.

This is why I love my fully automated luxury mediocre espresso maker ( https://www.seattlecoffeegear.com/blogs/scg-blog/jura-a1-rev... ). I push a button, it grinds the coffee and does stuff inside that I can't see, then moments later I have a perfectly average cup of something resembling burnt bean soup. I don't know whether it's megasonically brewed or absolute-zero infused or just wet caffeine pills. Sometimes it'…

Friend of mine, with money , has a coffee machine, by a company I’d never heard of, called “Jura”[0]. I’d not heard of it, because it’s not for plebes, like me. Grinds and brews a perfect cuppa in about a minute. I used to have a toddy maker, where you dumped a whole pound of ground coffee into a bucket of water, let it sit overnight, in the fridge, then you drained through a filter. The resulting thick liquid was li…

Jura seems to be more aimed at companies (who also have money), we had a few at HQ until we "upgraded" to a full on coffee/espresso machine, the type you see at proper coffee shops.

Re: Cold brew coffee in 3 minutes using acoustic cavitation

#296

Post by CydeWeys »

beAbU wrote: post #292
ChrisMarshallNY wrote: post #240

Earlier quoted context omitted.

Friend of mine, with money , has a coffee machine, by a company I’d never heard of, called “Jura”[0]. I’d not heard of it, because it’s not for plebes, like me. Grinds and brews a perfect cuppa in about a minute. I used to have a toddy maker, where you dumped a whole pound of ground coffee into a bucket of water, let it sit overnight, in the fridge, then you drained through a filter. The resulting thick liquid was li…

We have 2x Juras in my office. They cost a significant portion of my annual salary last time I checked. Reliable, repeatable, the coffee is not super duper excellent, but it's also not terrible. It's perfectly passable and it's free. My type of coffee.

I'm not sure I'd even want a Jura in a home environment. There's so much cleaning and maintenance required! My style is more like good hand grinder (simple, very low maintenance, doesn't take up counter-top space) and an Aeropress and V60 (both simple pieces of plastic, super easy to clean).

It's kind of unavoidable that it's going to be expensive and higher-maintenance to be able to make espresso at home, so I simply don't. Not worth it for me when I already have access to high-end espresso machines at work 5 days a week.

Re: Cold brew coffee in 3 minutes using acoustic cavitation

#297

Post by fch42 »

Cthulhu_ wrote: post #295
ChrisMarshallNY wrote: post #240

Earlier quoted context omitted.

Friend of mine, with money , has a coffee machine, by a company I’d never heard of, called “Jura”[0]. I’d not heard of it, because it’s not for plebes, like me. Grinds and brews a perfect cuppa in about a minute. I used to have a toddy maker, where you dumped a whole pound of ground coffee into a bucket of water, let it sit overnight, in the fridge, then you drained through a filter. The resulting thick liquid was li…

Jura seems to be more aimed at companies (who also have money), we had a few at HQ until we "upgraded" to a full on coffee/espresso machine, the type you see at proper coffee shops.

In Germany, Jura coffee machines do come up on the used market frequently enough if you really want one. If you're "lucky" enough to work in an office / for a company that is shutting down, you may get a "sweetened deal" with your layoff ...

Anyway, as others said ... good coffee they make, and some effort on cleaning they need (deserve).

On office coffee machines ... give me anything but syrup post-mix. Douwe-Egberts, I call you out. You make decent machines as well, stop peddling those abominations.

Re: Cold brew coffee in 3 minutes using acoustic cavitation

#298

Post by fch42 »

petre wrote: post #71
dahart wrote: post #44

Earlier quoted context omitted.

Very interesting, and I missed the 100W bit, thanks! Yeah that would be really hard to do by hand for 2 minutes. Maybe Guinness records needs to see who can shake their cold brew hardest/longest. So this begs further questions for me, like can I shake with 10W for 30 minutes, or 10 minutes, or…? Does the frequency matter? Can we use one of those chem lab agitator machines to cold brew?

Yes, it's the frequency and also the amplitude that makes it faster. One could use a lab agitator but it would still be too slow. I think if you pour the water into an ultrasonic cleaner along with the coffee and filter the mix you might get the same result.

That's precisely the thought which has taken hold of me now as well.

The ultrasonic cleaner is always stashed away somewhere safe for its once-a-year use ... I think can't resist to experiment.

Re: Cold brew coffee in 3 minutes using acoustic cavitation

#299

Post by beAbU »

CydeWeys wrote: post #296
beAbU wrote: post #292

Earlier quoted context omitted.

We have 2x Juras in my office. They cost a significant portion of my annual salary last time I checked. Reliable, repeatable, the coffee is not super duper excellent, but it's also not terrible. It's perfectly passable and it's free. My type of coffee.

I'm not sure I'd even want a Jura in a home environment. There's so much cleaning and maintenance required! My style is more like good hand grinder (simple, very low maintenance, doesn't take up counter-top space) and an Aeropress and V60 (both simple pieces of plastic, super easy to clean). It's kind of unavoidable that it's going to be expensive and higher-maintenance to be able to make espresso at home, so I simpl…

Oh yeah, weekly cleaning cycles, filters, special rinsing fluids and milk tubing that requires daily flushing. Also the machine needs to keep it's water block hot, else the startup time is a few minutes - so constant power draw.

If you have an office where the machine makes 100+ coffees it makes perfect sense. In a domestic setup it makes 0 sense.

Re: Cold brew coffee in 3 minutes using acoustic cavitation

#300

Post by CydeWeys »

beAbU wrote: post #299
CydeWeys wrote: post #296

Earlier quoted context omitted.

I'm not sure I'd even want a Jura in a home environment. There's so much cleaning and maintenance required! My style is more like good hand grinder (simple, very low maintenance, doesn't take up counter-top space) and an Aeropress and V60 (both simple pieces of plastic, super easy to clean). It's kind of unavoidable that it's going to be expensive and higher-maintenance to be able to make espresso at home, so I simpl…

Oh yeah, weekly cleaning cycles, filters, special rinsing fluids and milk tubing that requires daily flushing. Also the machine needs to keep it's water block hot, else the startup time is a few minutes - so constant power draw. If you have an office where the machine makes 100+ coffees it makes perfect sense. In a domestic setup it makes 0 sense.

Yeah, good point on the constant power draw too. I forgot to mention the last bit of kit I use to make my simple at-home coffees: an electric kettle. (And speaking of which, if I ever build my own home, I'm putting 240V counter-top outlets in the kitchen.)
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