171–180 of 329 posts
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You can hear your refrigerator???
You can't? Refrigerators have always made a noticeable background noise as they cycle on and off. The advantage of the newer variable speed scroll compressors in some high end fridges is that they can run continuously at a slower speed.
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.
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What about a ΔT of say 20°C? I'd reckon most refrigerators and air conditioners are around there (temp difference of refrigerant between evaporator and condenser). Stacking a bunch of these Peltiers to give more temperature difference would give a pretty low CoP. Say, for a 13°C temperature difference you'd have to stack 10 of them and use 10x the power. It's even worse actually as the hotter ones have to also pump t…
Note that a small temperature difference that is sustained very consistently over a long time using a tiny amount of electricity (let's say half of what the parent post cited, so like a COP of 8) could add up to a lot of nearly-free cooling. You'd chill your walls for weeks and when a heat wave comes with hot nights for a week, if you(r home automation) close(s) the blinds during the heat of the day, the more-powerfu…
A brick wall is on the heavy side and you'd be able to store a whopping 1/8 of a ton of AC in ten feet of brick wall. It'd save about 0.1kWh of AC power use. A whole house will have many lengths of wall but also multiple tons of cooling requirements, so that doesn't help much. And how are you going to distribute those small temperature differences without wasting a ton of power?
And that's after you figure out how to trap a temperature difference in your walls for more than a day.
This article uses the term AI 5 times to talk about basic microcontroller sensor readings.
What I want is a silent refrigerator, will this bring that? pray
Absorption refrigerators have been around for approximately a century, are silent, and a little more efficient than peltiers.
Earlier quoted context omitted.
You can't? Refrigerators have always made a noticeable background noise as they cycle on and off. The advantage of the newer variable speed scroll compressors in some high end fridges is that they can run continuously at a slower speed.
I'm not the same person, but I do not (and never have) noticed any noise when my fridge is running. Whether that means we have different fridges or different tolerances for noise, I'm not sure.
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The latest wave of appliances is really fucking loud for some reason. I think they're using different kinds of motor windings, bearings, insulation, etc. it's not related to the refrigerant or other system parameters. I've had older r600a fridges that were dead silent compared to anything sitting in a Best Buy showroom right now.
They use lighter lubricant oils than were historically used, which allows more vibration. It’s also why compressors burn out far more quickly than they used to.
This article uses the term AI 5 times to talk about basic microcontroller sensor readings.