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I used sound waves to make espresso

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Re: I used sound waves to make espresso

#61

Post by brian-m »

hdndjsbbs wrote: post #43
kowalej wrote: post #35

This seems very interesting, at least from a pure coffee nerd standpoint and what it could mean for improving espresso brewing in general. However, I'm going through the research paper, and am a bit skeptical of the energy savings angle, especially considering the many variables with espresso machine in terms of how they heat and brew (single vs dual boilers, heat exchangers vs dippers, spring lever machines vs pump…

"room temperature espresso" was the first thing I thought of - espresso is meant to be drunk hot, right away. If you let a good shot cool off and compare it to a bad shot you're not going to notice the difference as much because you made them both worse by letting them sit and cool. For industrial processes it probably doesn't matter - look at how nescafe is manufactured.

Would be awesome for industrial processes if it can be scaled, is comparable in price to heating water, and preserves what makes a good espresso a good espresso.

Was talking with a roaster who was providing espresso to a distillery recently. The distiller had tried a range of other products but only espresso shots were giving the flavour they were chasing. Needless to say, it ended up being a pretty limited run because the guys grew tired of pulling litres of shots for a batch!

Re: I used sound waves to make espresso

#62

Post by mh- »

zaat wrote: post #20
kylehotchkiss wrote: post #11

As I glance at my (checks notes) $200 power bill in San Diego apartment used entirely to run 3 ceiling fans and a box fan, I’m getting curious about all the ways power consumption can be reduced. No AC, LED lights, all gas appliances. I am going to switch over to a bunch of DC tower fans which claim to cut energy usage substantially. I wish more appliances would just switch to DC motors.

How much do you pay for kWh?

(I'm not the person you're replying to, but I live in San Diego too.)

We have the most expensive electricity rates in the country - both summer and winter are over $0.50/kWh.

Re: I used sound waves to make espresso

#63

Post by danielvaughn »

behnamoh wrote: post #57
neves wrote: post #53

The guy is from Colombia, so I can believe it is a good method

Is it sarcasm? In any case, I think there are frauds in all ranks of universities. I've seen people in CMU steal someone else's research idea or even a whole paper and the university doesn't punish the professors who did this. It's the PhD students whose work and life gets destroyed by such things.

I'm pretty sure the original comment is about Colombia's reputation for great coffee.

Re: I used sound waves to make espresso

#64

Post by klvino »

tadfisher wrote: post #34
wil421 wrote: post #17

Earlier quoted context omitted.

I have an ultrasound cleaner and it definitely vibrates and is noisy.

I think that's just a sound cleaner.

Applause for the pun.

When working with ultrasound, I think of it the context of a micro-agitator versus the large scale shaking, snipping, and slapping clothes against rocks methods.

Re: I used sound waves to make espresso

#65

Post by pfdietz »

hdndjsbbs wrote: post #43
kowalej wrote: post #35

This seems very interesting, at least from a pure coffee nerd standpoint and what it could mean for improving espresso brewing in general. However, I'm going through the research paper, and am a bit skeptical of the energy savings angle, especially considering the many variables with espresso machine in terms of how they heat and brew (single vs dual boilers, heat exchangers vs dippers, spring lever machines vs pump…

"room temperature espresso" was the first thing I thought of - espresso is meant to be drunk hot, right away. If you let a good shot cool off and compare it to a bad shot you're not going to notice the difference as much because you made them both worse by letting them sit and cool. For industrial processes it probably doesn't matter - look at how nescafe is manufactured.

I wonder if this process would work if the water were replaced with milk. Milk would degrade at high temperature, but this (at least in bulk) is at room temperature.

Re: I used sound waves to make espresso

#66

Post by bch »

danielvaughn wrote: post #63
behnamoh wrote: post #57

Earlier quoted context omitted.

Is it sarcasm? In any case, I think there are frauds in all ranks of universities. I've seen people in CMU steal someone else's research idea or even a whole paper and the university doesn't punish the professors who did this. It's the PhD students whose work and life gets destroyed by such things.

I'm pretty sure the original comment is about Colombia's reputation for great coffee.

^-- this comment was typed on a computer, similar to the computers the worlds most advanced AI is developed on, so you know he knows what he's talking about.

Re: I used sound waves to make espresso

#67

Post by zaat »

kruffalon wrote: post #50
zaat wrote: post #23

Earlier quoted context omitted.

Sparkling water (8-10C is the recommendation on the bottle in my hand). Bread (fresh from the oven, toast). Chicken Soup. And leaving aside examples, many things do taste better when they are hotter then 25, the heat helps more particles reach the olfactory receptors in your nose.

I'm sure that is correct for many people, but as I said: to _me_ things taste better at around room temperature. Even though I don't doubt your claim that some particles travel easier at higher degrees I suspect the difference is too small to notice before the rise in temperature becomes distracting to _me_.

Well, you know what's taste good and what's not - for you. You are the only judge for your own experience, and taste is an experience of the brain, not something out there. Nevertheless, most people do prefer hot meals, and there's scientifically explanation for that.

Re: I used sound waves to make espresso

#68

Post by zaat »

mh- wrote: post #62
zaat wrote: post #20

Earlier quoted context omitted.

How much do you pay for kWh?

(I'm not the person you're replying to, but I live in San Diego too.) We have the most expensive electricity rates in the country - both summer and winter are over $0.50/kWh.

I just checked my plan yesterday, I pay 0.13 Eur, summer and winter. I can commit to my provider for a year and lower it to 0.11, but with slightly higher fixed monthly cost (which is about 50 eur, regardless of consumption). With this prices you less likely to think about the efficiency of fans - it will probably will years to return the cost of fan replacement.

I pay 0.45 Euro for public car charging, returning the cost of installing a charger at my (rented) house will probably take 2 years.

Re: I used sound waves to make espresso

#69

Post by tadfisher »

Alupis wrote: post #42
tadfisher wrote: post #34

Earlier quoted context omitted.

I think that's just a sound cleaner.

Every ultrasound device makes sound, sometimes a lot of sound, because it's vibrating all of the materials, liquids, and air around it.

So does every piece of baryonic matter in the universe, in which case I am proud to be an ultrasound device.
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