Normal Operating Sounds
251–260 of 273 posts
Re: Normal Operating Sounds
#252Earlier quoted context omitted.
Using a cryptominer or GP computer at full tilt for the purpose of making heat is less than 100% efficient, because some of the input power gets used on computing. A pure resistive heater is also less than 100% efficient, but it's very very close.
Where does the energy "used on computing" go? The power consumption of a CPU is dissipated as heat.
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Re: Normal Operating Sounds
#253Earlier quoted context omitted.
Using a cryptominer or GP computer at full tilt for the purpose of making heat is less than 100% efficient, because some of the input power gets used on computing. A pure resistive heater is also less than 100% efficient, but it's very very close.
Your computer is not doing work (in the thermodynamic sense) that gets stored anywhere in the computer, and it is not transmitting a significant amount of energy out the Ethernet port either. (It is moving some energy out the port, copper or fiber, but it’s likely receiving an almost equal amount back, and the power is question is negligible.)
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Re: Normal Operating Sounds
#254Earlier quoted context omitted.
Using a cryptominer or GP computer at full tilt for the purpose of making heat is less than 100% efficient, because some of the input power gets used on computing. A pure resistive heater is also less than 100% efficient, but it's very very close.
Your computer is not doing work (in the thermodynamic sense) that gets stored anywhere in the computer, and it is not transmitting a significant amount of energy out the Ethernet port either. (It is moving some energy out the port, copper or fiber, but it’s likely receiving an almost equal amount back, and the power is question is negligible.)
I think what you're saying is that Max Planck knew a thing or two.
Re: Normal Operating Sounds
#255Earlier quoted context omitted.
Similar mechanism as your attic noises. There's a giant metal plate on the bottom of the thing, so all the heat generated while it's supercharging (in a very cold environment) causes that 'snap' which makes a loud noise. Same thing happens if you've ever heated up a thin metal baking sheet. It'll 'snap' from one position to another and make a horrible racket. Same thing apparently happens if you are heavy on regenera…
Something else interesting when supercharging in the cold...LOTS of steam(?) at times. Shocked me the first time it happened. Cold (~5F outside), low and hot battery (just went from 80 to ~5%). Legit thought the car was on fire at first.
Never experienced the steam myself, although I can't say I've ever tried supercharging the car at 5F. Coldest I've ever done it was probably in the 40s, which is plenty cold enough to cause that popping sound when it's pulling 250kW.
Re: Normal Operating Sounds
#256"Creaking From the Tires or Brakes" I don't have a Tesla, but I hear this sound in my own car, especially now that it's winter. I began hearing this after my recent car service that involved a ~real~ rear brakes replacement. When I took my car to the service guy, it was afternoon and I was no longer able to reproduce the noise. This was driving me crazy until now! I now know it's nothing to worry about.
Likely a bit of rust on the rotor. In addition, it is crazy how fast rotors rust when unused.
Example https://www.audizine.com/forum/showthread.php/623429-New-Bra...
Re: Normal Operating Sounds
#257Earlier quoted context omitted.
It's a joke. That clip is supposed to be your passengers.
I still don't understand. Is that a feature of the vehicle or not? Is this an April Fool's joke or is there a setting that cheers on the driver while accelerating? I see some individuals took insult to my question. Some of the sounds are pings and pops and knocks to mimic a combustable engine. What is this sound for?
The car doesn't make the sound. The documentation jokes that your passengers do.
Re: Normal Operating Sounds
#258Earlier quoted context omitted.
It would highly depend on the brand and model: one would expect Rolls-Royce EVs or even some like Lexus not to make any annoying noises.
Wouldn't one also expect that of Teslas, which are as expensive or more expensive than EVs made by legacy luxury brands like Lexus?
Tesla is new and mostly for tech-oriented people, the expectations are new and more techy things are ok. Legacy brands have expectations set in peoples' minds, so they have to keep up with their history.
Re: Normal Operating Sounds
#259Earlier quoted context omitted.
This. The latter is also useful to check for impending headgasket doom (or cracks) before it is otherwise visible.
Here's the oil analysis from my most recent change: https://bbot.org/etc/oct2022change.png The cold starts aren't great for driver comfort, but don't seem to have a big effect on engine internals.
The problem is that that cold oil is like sludge to pump around but your oil pump will try anyway. The result of that is insane oil pressure until the oil has warmed up enough to flow and that can cause all kinds of issue, from pump failure to cracks in lines. So it really isn't good but it will not show up in your oil analysis until something fails (and likely catastrophically) leaving your engine entirely without lubrication (you should get an immediate oil pressure alarm though when that happens, the sooner you can switch it off after that smaller the chance of damage).
On my car even with the 0W30 in it in winter the oil pressure starts almost at the top of the scale and as the oil warms up it drops, by the time it is warm enough at idle it sits at the lowest point on the scale + 1 unit. If I use the more sluggish summer oil for too long in winter I'll see it peg the needle on the oil pressure meter, and I have no idea how high it really is. So there is a substantial difference between the two, running temp is more or less the same when the engine is well and truly warmed up.
Re: Normal Operating Sounds
#260Earlier quoted context omitted.
Your computer is not doing work (in the thermodynamic sense) that gets stored anywhere in the computer, and it is not transmitting a significant amount of energy out the Ethernet port either. (It is moving some energy out the port, copper or fiber, but it’s likely receiving an almost equal amount back, and the power is question is negligible.)
I think what you're saying is that Max Planck knew a thing or two.
Huh? Maybe Rolf Landauer.
But this is really just conservation of energy or the first law of thermodynamics, and those predate Planck.