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Staying cool without refrigerants: Next-generation Peltier cooling

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Re: Staying cool without refrigerants: Next-generation Peltier cooling

#261

Post by ChoGGi »

jmb99 wrote: post #154
jfengel wrote: post #114

Earlier quoted context omitted.

I suspect it's that. Most inexpensive refrigerators don't have thermostats. Which seems insane; it cannot add that much to the price. 8C is a perfectly fine temperature for a wine fridge. And they usually have thermostats because a wine fridge is a luxury item. As opposed to keeping people from getting foodborne illness.

> Which seems insane; it cannot add that much to the price. Be careful what you wish for. When buying my current fridge, I specifically tried to go out of my way to avoid complexity, but the opening for my fridge is an odd size so my choices were limited. The only fridge I could buy that didn’t have a bunch of crap that’s was guaranteed to break (ice maker, water dispenser [seriously? aren’t most fridges right next t…

> water dispenser [seriously? aren’t most fridges right next to a faucet?

Same reason you'd keep a container of filtered water in your fridge.

Re: Staying cool without refrigerants: Next-generation Peltier cooling

#262

Post by bluGill »

achow wrote: post #244
zevv wrote: post #229

Earlier quoted context omitted.

Could you summarize the contents of this video so we don't have to watch it?

[dead]

How much of that is because of fundamental limitations, and how much just the best we can do with current technology but more effort could solve?

Re: Staying cool without refrigerants: Next-generation Peltier cooling

#263

Post by [deleted] »

fghorow wrote: post #27

For those worried about tiny COPs from these gizmos, trawling through the actual paper -- as well as the PR from JHU APL -- in this HN post [1] shows claims of COPs of ~15 for Delta Ts of 1.3°C. A compressor based cooler gets a COP of about 4 in the real world. I'm pretty sure this is an apples to oranges comparison to an expert (I am not one of those) but a factor of 3+ increase in COP is fairly noteworthy -- if it…

[deleted]

Re: Staying cool without refrigerants: Next-generation Peltier cooling

#264

Post by jameshart »

cactusfrog wrote: post #155
SchemaLoad wrote: post #144

This article uses the term AI 5 times to talk about basic microcontroller sensor readings.

My process control theory textbook has a chapter on neural networks and a lot of the language in control theory has an AI like tinge to it. I think this AI language is native to control theory so it might not be as overblown as it first sounds.

If you type ‘fuzzy logic’ in to google the autocomplete suggested search is ‘fuzzy logic rice cooker’. Control theory has been stealing ML terminology for a long time.

Re: Staying cool without refrigerants: Next-generation Peltier cooling

#265

Post by BobbyTables2 »

gsf_emergency_2 wrote: post #163
BobbyTables2 wrote: post #149

Earlier quoted context omitted.

Had a similar experience myself. The thinness of Peltier devices bothers me. Amazing temperature differences… without any room to insulate such!

I don't know how people can convince themselves that they can understand these effects. Unusually effective heat insulation is exactly how they work. (This is tempered by eg radiative losses, so making them thicker doesn't work better.) placing poorer heat (vs electrical) insulators between peltier material is counterproductive, similar to using resistors to improve conduction between copper wires Don't ask me for a…

Indeed, but in practical use (like a mini refrigerator), one will want to insulate the hot and cold sides from each other.

If one makes the walls thick, then they end up with a hole for the Peltier device and somehow sandwich two heatsinks on the device while maintaining insulation around it.

Perhaps easier to deal with in CPU cooling and such since one side is simply smacked into the thing being cooled.

Re: Staying cool without refrigerants: Next-generation Peltier cooling

#266

Post by TechDebtDevin »

oneshtein wrote: post #252
Seb-C wrote: post #247

Earlier quoted context omitted.

I purchased a book the other day, and when I turn the pages, it automatically shows me the text that I want to read. It must be powered by AI.

It looks like joke today, but it's not a joke anymore. Book can look at your search history youtube history, or reading history to have insight about your points of interest to create list of topics you like, then generate pages on the fly using LLM.

I imagine theres going to be an entire new class of intelligent humans powered by LLMs that

learn this way, and they are going to be at such a disadvantage to the people that do it the old fashioned way and dont take shortcuts.

The vast majority of humans are going to offload all their critical think skills to LLMs. I dont want to be friends with those people.

I want to start a blog about these people called "Artifically Intelligent"

Re: Staying cool without refrigerants: Next-generation Peltier cooling

#267

Post by ggus »

razakel wrote: post #198
SchemaLoad wrote: post #144

This article uses the term AI 5 times to talk about basic microcontroller sensor readings.

"Sorry, your subscription has expired and now all your food is mouldy. If you have any complaints, call 1-800-FUCK-YOU and we'll just laugh at you."

Even worse: If you have any complaints, call a number we won't publish anywhere on our site and a robotic voice will just laugh at you.

Re: Staying cool without refrigerants: Next-generation Peltier cooling

#268

Post by HighGoldstein »

lillecarl wrote: post #256
Hackbraten wrote: post #184

Earlier quoted context omitted.

So we need both AI and Kubernetes.

Hating on Kubernetes in 2025 doesn't really dong the gong like it used to, if you want to control your workloads through a well integrated API and not be bound to a cloud vendor there aren't many realistic options. Kubernetes is only hard because people make it hard and never bothered to understand the basics of their workload scheduler. Kubernetes is NOT AI hype, it solves real problems for real people everywhere. "…

I think a lot of the Kubernetes hate comes from non-technical people deciding to use it in cases where it either doesn't actually solve any problem, or the overhead is much greater than the benefit. There's a reason it originated from Google, and as much as it pains MBA factory graduates, the project or organizaton they manage is nowhere near Google scale.

Re: Staying cool without refrigerants: Next-generation Peltier cooling

#269

Post by artursapek »

TechDebtDevin wrote: post #266
oneshtein wrote: post #252

Earlier quoted context omitted.

It looks like joke today, but it's not a joke anymore. Book can look at your search history youtube history, or reading history to have insight about your points of interest to create list of topics you like, then generate pages on the fly using LLM.

I imagine theres going to be an entire new class of intelligent humans powered by LLMs that learn this way, and they are going to be at such a disadvantage to the people that do it the old fashioned way and dont take shortcuts. The vast majority of humans are going to offload all their critical think skills to LLMs. I dont want to be friends with those people. I want to start a blog about these people called "Artific…

They exist already, and are the people who watch a lot of cable TV. They are called NPCs

Re: Staying cool without refrigerants: Next-generation Peltier cooling

#270

Post by tlocke »

mousethatroared wrote: post #250
gsf_emergency_2 wrote: post #163

Earlier quoted context omitted.

I don't know how people can convince themselves that they can understand these effects. Unusually effective heat insulation is exactly how they work. (This is tempered by eg radiative losses, so making them thicker doesn't work better.) placing poorer heat (vs electrical) insulators between peltier material is counterproductive, similar to using resistors to improve conduction between copper wires Don't ask me for a…

What is exergy? The one time a mechanical engineering colleagues tried to explain it to me, he reached the wrong conclusion on the problem we were working on. I haven't seen it in any physics thermodynamics book, and only mech eng. seem to know what it is, and then only in the US. Faires (undergrad MIT Thermo book from the 50s) makes no mention of it as far as I can tell.

Exergy is the amount of work that a system can potentially do. It was on my physics course in the UK I'm fairly sure.
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